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  • 201.
    Adlarson, Patrik
    et al.
    Uppsala University, Disciplinary Domain of Science and Technology, Physics, Department of Physics and Astronomy, Nuclear Physics.
    Adolph, C.
    Augustyniak, W.
    Bardan, W.
    Bashkanov, M.
    Bednarski, T.
    Bergmann, F. S.
    Berlowski, M.
    Bhatt, H.
    Brinkmann, K. -T
    Buescher, M.
    Calén, Hans
    Clement, H
    Coderre, D.
    Czerwinski, E.
    Doroshkevich, E.
    Engels, R.
    Erven, W.
    Eyrich, W.
    Fedorets, P.
    Foehl, K.
    Fransson, Kjell
    Uppsala University, Disciplinary Domain of Science and Technology, Physics, Department of Physics and Astronomy, Nuclear Physics.
    Goldenbaum, F.
    Goslawski, P.
    Grigoryev, K.
    Gullström, Carl-Oscar
    Uppsala University, Disciplinary Domain of Science and Technology, Physics, Department of Physics and Astronomy, Nuclear Physics.
    Hanhart, C.
    Heijkenskjöld, Lena
    Uppsala University, Disciplinary Domain of Science and Technology, Physics, Department of Physics and Astronomy, Nuclear Physics.
    Heimlich, J.
    Hejny, V.
    Hinterberger, F.
    Hodana, M.
    Höistad, Bo
    Uppsala University, Disciplinary Domain of Science and Technology, Physics, Department of Physics and Astronomy, Nuclear Physics.
    Jacewicz, Marek
    Uppsala University, Disciplinary Domain of Science and Technology, Physics, Department of Physics and Astronomy, High Energy Physics.
    Jany, A.
    Jany, B. R.
    Jarczyk, L.
    Johansson, Tord
    Uppsala University, Disciplinary Domain of Science and Technology, Physics, Department of Physics and Astronomy, Nuclear Physics.
    Kamys, B.
    Kemmerling, G.
    Khakimova, O.
    Khoukaz, A.
    Kistryn, S.
    Klaja, J.
    Kleines, H.
    Klos, B.
    Kren, F.
    Krzemien, W.
    Kulessa, P.
    Kupsc, Andrzej
    Uppsala University, Disciplinary Domain of Science and Technology, Physics, Department of Physics and Astronomy, Nuclear Physics.
    Lalwani, K.
    Leupold, Stefan
    Uppsala University, Disciplinary Domain of Science and Technology, Physics, Department of Physics and Astronomy, Nuclear Physics.
    Lorentz, B.
    Magiera, A.
    Maier, R.
    Marianski, B.
    Marciniewski, Pawel
    Uppsala University, Disciplinary Domain of Science and Technology, Physics, Department of Physics and Astronomy, Nuclear Physics.
    Meissner, U-G
    Mikirtychiants, M.
    Morsch, H. -P
    Moskal, P.
    Nandi, B. K.
    Niedzwiecki, S.
    Ohm, H.
    Passfeld, A.
    Pauly, C.
    del Rio, E. Perez
    Petri, T.
    Petukhov, Y.
    Piskunov, N.
    Plucinski, Pawel
    Uppsala University, Disciplinary Domain of Science and Technology, Physics, Department of Physics and Astronomy, Nuclear Physics.
    Podkopal, P.
    Povtoreyko, A.
    Prasuhn, D.
    Pricking, A.
    Pysz, K.
    Pyszniak, A.
    Rausmann, T.
    Redmer, Cristoph F.
    Uppsala University, Disciplinary Domain of Science and Technology, Physics, Department of Physics and Astronomy, Nuclear Physics.
    Ritman, J.
    Roy, A.
    Rudy, Z.
    Sawant, S.
    Schadmand, S.
    Schmidt, A.
    Sefzick, T.
    Serdyuk, V.
    Shah, N.
    Siemaszko, M.
    Siudak, R.
    Skorodko, T.
    Skurzok, M.
    Smyrski, J.
    Sopov, V.
    Stassen, R.
    Stepaniak, J.
    Sterzenbach, G.
    Stockhorst, H.
    Stollenwerk, F.
    Stroeher, H.
    Szczurek, A.
    Taeschner, A.
    Terschlüsen, Carla
    Uppsala University, Disciplinary Domain of Science and Technology, Physics, Department of Physics and Astronomy, Nuclear Physics.
    Tolba, T.
    Trzcinski, A.
    Varma, R.
    Vlasov, P.
    Wagner, G. J.
    Weglorz, W.
    Winnemoeller, A.
    Wirzba, A.
    Wolke, Magnus
    Uppsala University, Disciplinary Domain of Science and Technology, Physics, Department of Physics and Astronomy, Nuclear Physics.
    Wronska, A.
    Wuestner, P.
    Wurm, P.
    Yuan, X.
    Yurev, L.
    Zabierowski, J.
    Zheng, C.
    Zielinski, M. J.
    Zipper, W.
    Zlomanczuk, Jozef
    Uppsala University, Disciplinary Domain of Science and Technology, Physics, Department of Physics and Astronomy, Nuclear Physics.
    Zupranski, P.
    Exclusive measurement of the eta -> pi(+) pi(-) gamma decay2012In: Physics Letters B, ISSN 0370-2693, E-ISSN 1873-2445, Vol. 707, no 2, p. 243-249Article in journal (Refereed)
    Abstract [en]

    An exclusive measurement of the decay eta -> pi(+) pi(-) gamma has been performed at the WASA facility at COSY. The eta mesons were produced in the fusion reaction pd -> He-3 X at a proton beam momentum of 1.7 GeV/c. Efficiency corrected differential distributions have been extracted based on 13 960 +/- 140 events after background subtraction. The measured pion angular distribution is consistent with a relative p-wave of the two-pion system, whereas the measured photon energy spectrum was found at variance with the simplest gauge invariant matrix element of eta -> pi(+) pi(-) gamma. A parameterization of the data can be achieved by the additional inclusion of the empirical pion vector form factor multiplied by a first-order polynomial in the squared invariant mass of the pi(+) pi(-) system.

  • 202.
    Adlarson, Patrik
    et al.
    Uppsala University, Disciplinary Domain of Science and Technology, Physics, Department of Physics and Astronomy, Nuclear Physics.
    Adolph, C.
    Augustyniak, W.
    Baru, V.
    Bashkanov, M.
    Bednarski, T.
    Bergmann, F. S.
    Berlowski, M.
    Bhatt, H.
    Brinkmann, K. -T
    Buescher, M.
    Calén, Hans
    Uppsala University, Disciplinary Domain of Science and Technology, Physics, Department of Physics and Astronomy, Nuclear Physics.
    Clement, H.
    Coderre, D.
    Czerwinski, E.
    Doroshkevich, E.
    Ekstrom, C.
    Engels, R.
    Erven, W.
    Eyrich, W.
    Fedorets, P.
    Foehl, K.
    Fransson, Kjell
    Uppsala University, Disciplinary Domain of Science and Technology, Physics, Department of Physics and Astronomy, Nuclear Physics.
    Goldenbaum, F.
    Goslawski, P.
    Grigoryev, K.
    Grishina, V.
    Gullström, Carl-Oscar
    Uppsala University, Disciplinary Domain of Science and Technology, Physics, Department of Physics and Astronomy, Nuclear Physics.
    Hampe, J.
    Hanhart, C.
    Heijkenskjöld, Lena
    Uppsala University, Disciplinary Domain of Science and Technology, Physics, Department of Physics and Astronomy, Nuclear Physics.
    Hejny, V.
    Hinterberger, F.
    Hodana, M.
    Höistad, Bo
    Uppsala University, Disciplinary Domain of Science and Technology, Physics, Department of Physics and Astronomy, Nuclear Physics.
    Jacewicz, Marek
    Uppsala University, Disciplinary Domain of Science and Technology, Physics, Department of Physics and Astronomy, High Energy Physics.
    Janusz, M.
    Jany, A.
    Jany, B. R.
    Jarczyk, L.
    Johansson, Tord
    Uppsala University, Disciplinary Domain of Science and Technology, Physics, Department of Physics and Astronomy, Nuclear Physics.
    Kamys, B.
    Kemmerling, G.
    Khakimova, O.
    Khoukaz, A.
    Kistryn, S.
    Klaja, J.
    Kleines, H.
    Klos, B.
    Kren, F.
    Krzemien, W.
    Kulessa, P.
    Kullander, Sven
    Uppsala University, Disciplinary Domain of Science and Technology, Physics, Department of Physics and Astronomy, High Energy Physics.
    Kupsc, Andrzej
    Uppsala University, Disciplinary Domain of Science and Technology, Physics, Department of Physics and Astronomy, Nuclear Physics.
    Lalwani, K.
    Lorentz, B.
    Magiera, A.
    Maier, R.
    Marciniewski, Pavel
    Uppsala University, Disciplinary Domain of Science and Technology, Physics, Department of Physics and Astronomy, Nuclear Physics.
    Marianski, B.
    Mikirtychiants, M.
    Moskal, P.
    Morsch, H. -P
    Nandi, B. K.
    Niedzwiecki, S.
    Ohm, H.
    Passfeld, A.
    Pauly, C.
    del Rio, E. Perez
    Petukhov, Y.
    Piskunov, N.
    Plucinski, Pawel
    Uppsala University, Disciplinary Domain of Science and Technology, Physics, Department of Physics and Astronomy, Nuclear Physics.
    Podkopal, P.
    Povtoreyko, A.
    Prasuhn, D.
    Pricking, A.
    Pysz, K.
    Rausmann, T.
    Redmer, Christoph F.
    Uppsala University, Disciplinary Domain of Science and Technology, Physics, Department of Physics and Astronomy, Nuclear Physics.
    Ritman, J.
    Roy, A.
    Ruber, Roger J. M. Y.
    Uppsala University, Disciplinary Domain of Science and Technology, Physics, Department of Physics and Astronomy, High Energy Physics.
    Rudy, Z.
    Sawant, S.
    Schadmand, S.
    Schmidt, A.
    Schroeder, W.
    Sefzick, T.
    Serdyuk, V.
    Shah, N.
    Siemaszko, M.
    Siudak, R.
    Skorodko, T.
    Skurzok, M.
    Smyrski, J.
    Sopov, V.
    Stassen, R.
    Stepaniak, J.
    Sterzenbach, G.
    Stockhorst, H.
    Stroeher, H.
    Szczurek, A.
    Taeschner, A.
    Tolba, T.
    Trzcinski, A.
    Varma, R.
    Vlasov, P.
    Wagner, G. J.
    Weglorz, W.
    Winnemoeller, A.
    Wirzba, A.
    Wolke, Magnus
    Uppsala University, Disciplinary Domain of Science and Technology, Physics, Department of Physics and Astronomy, Nuclear Physics.
    Wronska, A.
    Wuestner, P.
    Wurm, P.
    Yuan, X.
    Yurev, L.
    Zabierowski, J.
    Zheng, C.
    Zielinski, M. J.
    Zipper, W.
    Zlomanczuk, Jozef
    Uppsala University, Disciplinary Domain of Science and Technology, Physics, Department of Physics and Astronomy, Nuclear Physics.
    Zupranski, P.
    Abashian-Booth-Crowe Effect in Basic Double-Pionic Fusion: A New Resonance?2011In: Physical Review Letters, ISSN 0031-9007, E-ISSN 1079-7114, Vol. 106, no 24, p. 242302-Article in journal (Refereed)
    Abstract [en]

    We report on an exclusive and kinematically complete high-statistics measurement of the basic double-pionic fusion reaction pn -> d pi(0)pi(0) over the full energy region of the ABC effect, a pronounced low-mass enhancement in the pi pi-invariant mass spectrum. The measurements, which cover also the transition region to the conventional t- channel Delta Delta process, were performed with the upgraded WASA detector setup at COSY. The data reveal the Abashian-Booth-Crowe effect to be uniquely correlated with a Lorentzian energy dependence in the integral cross section. The observables are consistent with a narrow resonance with m = 2.37 GeV, Gamma approximate to 70 MeV and I(J(P)) = 0(3(+)) in both pn and Delta Delta systems. Necessary further tests of the resonance interpretation are discussed.

  • 203.
    Adlarson, Patrik
    et al.
    Uppsala University, Disciplinary Domain of Science and Technology, Physics, Department of Physics and Astronomy, Nuclear Physics.
    Adolph, C.
    Augustyniak, W.
    Bashkanov, M.
    Bednarski, T.
    Bergmann, F. S.
    Berlowski, M.
    Bhatt, H.
    Brinkmann, K. -T
    Buescher, M.
    Calén, Hans
    Uppsala University, Disciplinary Domain of Science and Technology, Physics, Department of Physics and Astronomy, Nuclear Physics.
    Clement, H.
    Coderre, D.
    Czerwinski, E.
    Doroshkevich, E.
    Engels, R.
    Erven, W.
    Eyrich, W.
    Fedorets, P.
    Foehl, K.
    Fransson, Kjell
    Uppsala University, Disciplinary Domain of Science and Technology, Physics, Department of Physics and Astronomy, Nuclear Physics.
    Goldenbaum, F.
    Goslawski, P.
    Grigoryev, K.
    Gullström, Carl-Oskar
    Uppsala University, Disciplinary Domain of Science and Technology, Physics, Department of Physics and Astronomy, Nuclear Physics.
    Heijkenskjöld, Lena
    Uppsala University, Disciplinary Domain of Science and Technology, Physics, Department of Physics and Astronomy, Nuclear Physics.
    Heimlich, J.
    Hejny, V.
    Hinterberger, F.
    Hodana, M.
    Höistad, Bo
    Uppsala University, Disciplinary Domain of Science and Technology, Physics, Department of Physics and Astronomy, Nuclear Physics.
    Jacewicz, Marek
    Uppsala University, Disciplinary Domain of Science and Technology, Physics, Department of Physics and Astronomy, Nuclear Physics.
    Janusz, M.
    Jany, A.
    Jany, B. R.
    Jarczyk, L.
    Johansson, Tord
    Uppsala University, Disciplinary Domain of Science and Technology, Physics, Department of Physics and Astronomy, Nuclear Physics.
    Kamys, B.
    Kemmerling, G.
    Khakimova, O.
    Khoukaz, A.
    Kistryn, S.
    Klaja, J.
    Kleines, H.
    Klos, B.
    Kren, F.
    Krzemien, W.
    Kulessa, P.
    Kupsc, Andrzej
    Uppsala University, Disciplinary Domain of Science and Technology, Physics, Department of Physics and Astronomy, Nuclear Physics.
    Lalwani, K.
    Lorentz, B.
    Magiera, A.
    Maier, R.
    Marianski, B.
    Marciniewski, Pawel
    Uppsala University, Disciplinary Domain of Science and Technology, Physics, Department of Physics and Astronomy, Nuclear Physics.
    Mikirtychiants, M.
    Morsch, H. -P
    Moskal, P.
    Nandi, B. K.
    Niedzwiecki, S.
    Ohm, H.
    Passfeld, A.
    Pauly, C.
    del Rio, E. Perez
    Petukhov, Y.
    Piskunov, N.
    Plucinski, Pawel
    Uppsala University, Disciplinary Domain of Science and Technology, Physics, Department of Physics and Astronomy, Nuclear Physics.
    Podkopal, P.
    Povtoreyko, A.
    Prasuhn, D.
    Pricking, A.
    Pysz, K.
    Rausmann, T.
    Redmer, Christoph F.
    Uppsala University, Disciplinary Domain of Science and Technology, Physics, Department of Physics and Astronomy, Nuclear Physics.
    Ritman, J.
    Roy, A.
    Rudy, Z.
    Sawant, S.
    Schadmand, S.
    Schmidt, A.
    Sefzick, T.
    Serdyuk, V.
    Shah, N.
    Siemaszko, M.
    Skorodko, T.
    Skurzok, M.
    Smyrski, J.
    Sopov, V.
    Stassen, R.
    Stepaniak, J.
    Sterzenbach, G.
    Stockhorst, H.
    Stroeher, H.
    Szczurek, A.
    Taeschner, A.
    Tolba, T.
    Trzcinski, A.
    Varma, R.
    Vlasov, P.
    Wagner, G. J.
    Weglorz, W.
    Wiedner, U.
    Winnemoeller, A.
    Wolke, Magnus
    Uppsala University, Disciplinary Domain of Science and Technology, Physics, Department of Physics and Astronomy, Nuclear Physics.
    Wronska, A.
    Wuestner, P.
    Wurm, P.
    Yuan, X.
    Yurev, L.
    Zabierowski, J.
    Zheng, C.
    Zielinski, M. J.
    Zipper, W.
    Zlomanczuk, Jozef
    Uppsala University, Disciplinary Domain of Science and Technology, Physics, Department of Physics and Astronomy, Nuclear Physics.
    Zupranski, P.
    pi(0)pi(0) Production in proton-proton collisions at T-p=1.4 GeV The WASA-at-COSY Collaboration2012In: Physics Letters B, ISSN 0370-2693, E-ISSN 1873-2445, Vol. 706, no 4-5, p. 256-262Article in journal (Refereed)
    Abstract [en]

    The reaction pp -> pp pi(0)pi(0) has been investigated at a beam energy of 1.4 GeV using the WASA-at-COSY facility. The total cross section is found to be (324 +/- 21(systematic) +/- 58(normalization)) mu b. In order to study the production mechanism, differential kinematic distributions have been evaluated. The differential distributions indicate that both initial state protons are excited into intermediate Delta(1232) resonances, each decaying into a proton and a single pion, thereby producing the pion pair in the final state. No significant contribution of the Roper resonance N*(1440) via its decay into a proton and two pions is found.

  • 204.
    Adlarson, Patrik
    et al.
    Uppsala University, Disciplinary Domain of Science and Technology, Physics, Department of Physics and Astronomy, Nuclear Physics.
    Augustyniak, W.
    Natl Ctr Nucl Res, Dept Nucl Phys, Ul Hoza 69, PL-00681 Warsaw, Poland..
    Bardan, W.
    Jagiellonian Univ, Inst Phys, Prof Stanislawa Lojasiewicza 11, PL-30348 Krakow, Poland..
    Bashkanov, M.
    Univ Edinburgh, Sch Phys & Astron, James Clerk Maxwell Bldg,Peter Guthrie Tait Rd, Edinburgh EH9 3FD, Midlothian, Scotland..
    Bass, S. D.
    Bergmann, F. S.
    Westfal Wilhelms Univ Munster, Inst Kernphys, Wilhelm Klemm Str 9, D-48149 Munster, Germany..
    Berlowski, M.
    Natl Ctr Nucl Res, High Energy Phys Dept, Ul Hoza 69, PL-00681 Warsaw, Poland..
    Bondar, A.
    SB RAS, Budker Inst Nucl Phys, 11 Aka Lavrentieva Prospect, Novosibirsk 630090, Russia.;Novosibirsk State Univ, 2 Pirogova Str, Novosibirsk 630090, Russia..
    Buscher, M.
    Forschungszentrum Julich, Inst Kernphys, D-52425 Julich, Germany.;Forschungszentrum Julich, PGI Elekt Eigensch 6, Peter Grunberg Inst, D-52425 Julich, Germany.;Heinrich Heine Univ Dusseldorf, Inst Laser & Plasmaphys, Univ Str 1, D-40225 Dusseldorf, Germany..
    Calén, Hans
    Uppsala University, Disciplinary Domain of Science and Technology, Physics, Department of Physics and Astronomy, Nuclear Physics.
    Ciepal, I.
    Polish Acad Sci, Henryk Niewodniczanski Inst Nucl Phys, 152 Radzikowskiego St, PL-31342 Krakow, Poland..
    Clement, H.
    Eberhard Karls Univ Tubingen, Phys Inst, Morgenstelle 14, D-72076 Tubingen, Germany.;Univ Tubingen, Phys Inst, Kepler Ctr Astro & Teilchenphys, D-72076 Tubingen, Germany..
    Czerwinski, E.
    Jagiellonian Univ, Inst Phys, Prof Stanislawa Lojasiewicza 11, PL-30348 Krakow, Poland..
    Demmich, K.
    Westfal Wilhelms Univ Munster, Inst Kernphys, Wilhelm Klemm Str 9, D-48149 Munster, Germany..
    Engels, R.
    Forschungszentrum Julich, Inst Kernphys, D-52425 Julich, Germany..
    Erven, A.
    Erven, W.
    Forschungszentrum Julich, ZentralInst Engn Elekt & Analyt, D-52425 Julich, Germany..
    Eyrich, W.
    Friedrich Alexander Univ Erlangen Nurnberg, Phys Inst, Erwin Rommel Str 1, D-91058 Erlangen, Germany..
    Fedorets, P.
    Forschungszentrum Julich, Inst Kernphys, D-52425 Julich, Germany.;State Sci Ctr Russian Federat, Inst Theoret & Expt Phys, Bolshaya Cheremushkinskaya 25, Moscow 117218, Russia..
    Fohl, K.
    Justus Liebig Univ Giessen, Phys Inst 2, Heinrich Buff Ring 16, D-35392 Giessen, Germany..
    Fransson, Kjell
    Uppsala University, Disciplinary Domain of Science and Technology, Physics, Department of Physics and Astronomy, Nuclear Physics.
    Goldenbaum, F.
    Forschungszentrum Julich, Inst Kernphys, D-52425 Julich, Germany..
    Goswami, A.
    Forschungszentrum Julich, Inst Kernphys, D-52425 Julich, Germany.;Indian Inst Technol Indore, Dept Phys, Indore 453552, Madhya Pradesh, India..
    Grigoryev, K.
    Forschungszentrum Julich, Inst Kernphys, D-52425 Julich, Germany.;Petersburg Nucl Phys Inst, High Energy Phys Div, Orlova Rosha 2, Gatchina, Russia..
    Gullström, Carl-Oskar
    Uppsala University, Disciplinary Domain of Science and Technology, Physics, Department of Physics and Astronomy, Nuclear Physics.
    Heijkenskjöld, Lena
    Uppsala University, Disciplinary Domain of Science and Technology, Physics, Department of Physics and Astronomy, Nuclear Physics. Institut für Kernphysik, Johannes Gutenberg-Universität Mainz, Mainz, Germany.
    Hejny, V.
    Forschungszentrum Julich, Inst Kernphys, D-52425 Julich, Germany..
    Husken, N.
    Westfal Wilhelms Univ Munster, Inst Kernphys, Wilhelm Klemm Str 9, D-48149 Munster, Germany..
    Jarczyk, L.
    Jagiellonian Univ, Inst Phys, Prof Stanislawa Lojasiewicza 11, PL-30348 Krakow, Poland..
    Johansson, Tord
    Uppsala University, Disciplinary Domain of Science and Technology, Physics, Department of Physics and Astronomy, Nuclear Physics.
    Kamys, B.
    Jagiellonian Univ, Inst Phys, Prof Stanislawa Lojasiewicza 11, PL-30348 Krakow, Poland..
    Kemmerling, G.
    Forschungszentrum Julich, ZentralInst Engn Elekt & Analyt, D-52425 Julich, Germany..
    Khatri, G.
    Jagiellonian Univ, Inst Phys, Prof Stanislawa Lojasiewicza 11, PL-30348 Krakow, Poland.;Harvard Univ, Dept Phys, 17 Oxford St, Cambridge, MA 02138 USA..
    Khoukaz, A.
    Westfal Wilhelms Univ Munster, Inst Kernphys, Wilhelm Klemm Str 9, D-48149 Munster, Germany..
    Khreptak, O.
    Jagiellonian Univ, Inst Phys, Prof Stanislawa Lojasiewicza 11, PL-30348 Krakow, Poland..
    Kirillov, D. A.
    Joint Inst Nucl Phys, Veksler & Baldin Lab High Energiy Phys, 6 Joliot Curie, Dubna 141980, Russia..
    Kistryn, S.
    Kleines, H.
    Forschungszentrum Julich, Julich Ctr Neutron Sci JCNS, D-52425 Julich, Germany..
    Klos, B.
    Univ Silesia, August Chelkowski Inst Phys, Uniwersytecka 4, PL-40007 Katowice, Poland..
    Krzemien, W.
    Kulessa, P.
    Polish Acad Sci, Henryk Niewodniczanski Inst Nucl Phys, 152 Radzikowskiego St, PL-31342 Krakow, Poland..
    Kupsc, Andrzej
    Uppsala University, Disciplinary Domain of Science and Technology, Physics, Department of Physics and Astronomy, Nuclear Physics. Natl Ctr Nucl Res, High Energy Phys Dept, Warsaw, Poland.
    Kuzmin, A.
    SB RAS, Budker Inst Nucl Phys, 11 Aka Lavrentieva Prospect, Novosibirsk 630090, Russia..
    Lalwani, K.
    Malaviya Natl Inst Technol Jaipur, Dept Phys, JLN Marg, Jaipur 302017, Rajasthan, India..
    Lersch, D.
    Forschungszentrum Julich, Inst Kernphys, D-52425 Julich, Germany..
    Lorentz, B.
    Forschungszentrum Julich, Inst Kernphys, D-52425 Julich, Germany..
    Magiera, A.
    Maier, R.
    Forschungszentrum Julich, Inst Kernphys, D-52425 Julich, Germany.;Forschungszentrum Julich, Julich Aachen Res Alliance, FAME, JARA, D-52425 Julich, Germany.;Rhein Westfal TH Aachen, D-52056 Aachen, Germany..
    Marciniewski, Pawel
    Uppsala University, Disciplinary Domain of Science and Technology, Physics, Department of Physics and Astronomy, Nuclear Physics.
    Marianski, B.
    Morsch, H. -P
    Moskal, P.
    Ohm, H.
    Forschungszentrum Julich, Inst Kernphys, D-52425 Julich, Germany..
    Parol, W.
    Polish Acad Sci, Henryk Niewodniczanski Inst Nucl Phys, 152 Radzikowskiego St, PL-31342 Krakow, Poland..
    del Rio, E. Perez
    Eberhard Karls Univ Tubingen, Phys Inst, Morgenstelle 14, D-72076 Tubingen, Germany.;Univ Tubingen, Phys Inst, Kepler Ctr Astro & Teilchenphys, D-72076 Tubingen, Germany.;Ist Nazl Fis Nucl, Lab Nazl Frascati, Via E Fermi 40, I-00044 Frascati, Roma, Italy..
    Piskunov, N. M.
    Prasuhn, D.
    Forschungszentrum Julich, Inst Kernphys, D-52425 Julich, Germany..
    Pszczel, Damian
    Uppsala University, Disciplinary Domain of Science and Technology, Physics, Department of Physics and Astronomy, Nuclear Physics. Natl Ctr Nucl Res, High Energy Phys Dept, Warsaw, Poland.
    Pysz, K.
    Polish Acad Sci, Henryk Niewodniczanski Inst Nucl Phys, 152 Radzikowskiego St, PL-31342 Krakow, Poland..
    Pyszniak, A.
    Uppsala University, Disciplinary Domain of Science and Technology, Physics, Department of Physics and Astronomy, Nuclear Physics.
    Ritman, J.
    Forschungszentrum Julich, Julich Aachen Res Alliance, FAME, JARA, D-52425 Julich, Germany.;Rhein Westfal TH Aachen, D-52056 Aachen, Germany.;Ruhr Univ Bochum, Inst Expt Phys 1, Univ Str 150, D-44780 Bochum, Germany..
    Roy, A.
    Rudy, Z.
    Rundel, O.
    Sawant, S.
    Indian Inst Technol, Dept Phys, Bombay 400076, Maharashtra, India..
    Schadmand, S.
    Schatti-Ozerianska, I.
    Jagiellonian Univ, Inst Phys, Prof Stanislawa Lojasiewicza 11, PL-30348 Krakow, Poland..
    Sefzick, T.
    Forschungszentrum Julich, Inst Kernphys, D-52425 Julich, Germany..
    Serdyuk, V.
    Forschungszentrum Julich, Inst Kernphys, D-52425 Julich, Germany..
    Shwartz, B.
    Sitterberg, K.
    Skorodko, T.
    Eberhard Karls Univ Tubingen, Phys Inst, Morgenstelle 14, D-72076 Tubingen, Germany.;Univ Tubingen, Phys Inst, Kepler Ctr Astro & Teilchenphys, D-72076 Tubingen, Germany.;Tomsk State Univ, Dept Phys, 36 Lenina Ave, Tomsk 634050, Russia..
    Skurzok, M.
    Jagiellonian Univ, Inst Phys, Prof Stanislawa Lojasiewicza 11, PL-30348 Krakow, Poland..
    Smyrski, J.
    Sopov, V.
    Stassen, R.
    Forschungszentrum Julich, Inst Kernphys, D-52425 Julich, Germany..
    Stepaniak, J.
    Stephan, E.
    Sterzenbach, G.
    Forschungszentrum Julich, Inst Kernphys, D-52425 Julich, Germany..
    Stockhorst, H.
    Forschungszentrum Julich, Inst Kernphys, D-52425 Julich, Germany..
    Stroeher, H.
    Forschungszentrum Julich, Inst Kernphys, D-52425 Julich, Germany.;Forschungszentrum Julich, Julich Aachen Res Alliance, FAME, JARA, D-52425 Julich, Germany.;Rhein Westfal TH Aachen, D-52056 Aachen, Germany..
    Szczurek, A.
    Polish Acad Sci, Henryk Niewodniczanski Inst Nucl Phys, 152 Radzikowskiego St, PL-31342 Krakow, Poland..
    Trzcinski, A.
    Natl Ctr Nucl Res, Dept Nucl Phys, Ul Hoza 69, PL-00681 Warsaw, Poland..
    Wolke, Magnus
    Uppsala University, Disciplinary Domain of Science and Technology, Physics, Department of Physics and Astronomy, Nuclear Physics.
    Wronska, A.
    Jagiellonian Univ, Inst Phys, Prof Stanislawa Lojasiewicza 11, PL-30348 Krakow, Poland..
    Wustner, P.
    Forschungszentrum Julich, ZentralInst Engn Elekt & Analyt, D-52425 Julich, Germany..
    Yamamoto, A.
    High Energy Accelerator Res Org KEK, Tsukuba, Ibaraki 3050801, Japan..
    Zabierowski, J.
    Natl Ctr Nucl Res, Dept Astrophys, PL-90950 Lodz, Poland..
    Zielinski, M. J.
    Zlomanczuk, Jozef
    Uppsala University, Disciplinary Domain of Science and Technology, Physics, Department of Physics and Astronomy, Nuclear Physics.
    Zupranski, P.
    Natl Ctr Nucl Res, Dept Nucl Phys, Ul Hoza 69, PL-00681 Warsaw, Poland..
    Zurek, M.
    Forschungszentrum Julich, Inst Kernphys, D-52425 Julich, Germany..
    Spin Dependence of eta Meson Production in Proton-Proton Collisions Close to Threshold2018In: Physical Review Letters, ISSN 0031-9007, E-ISSN 1079-7114, Vol. 120, no 2, article id 022002Article in journal (Refereed)
    Abstract [en]

    Taking advantage of the high acceptance and axial symmetry of the WASA-at-COSY detector, and the high polarization degree of the proton beam of COSY, the reaction →pp→ppη has been measured close to threshold to explore the analyzing power Ay. The angular distribution of Ay is determined with the precision improved by more than 1 order of magnitude with respect to previous results, allowing a first accurate comparison with theoretical predictions. The determined analyzing power is consistent with zero for an excess energy of Q=15  MeV, signaling s-wave production with no evidence for higher partial waves. At Q=72  MeV the data reveal strong interference of Ps and Pp partial waves and cancellation of (Pp)2 and Ss∗Sd contributions. These results rule out the presently available theoretical predictions for the production mechanism of the η meson.

  • 205.
    Adlarson, Patrik
    et al.
    Uppsala University, Disciplinary Domain of Science and Technology, Physics, Department of Physics and Astronomy, Nuclear Physics.
    Augustyniak, W.
    Bardan, W.
    Bashkanov, M.
    Bednarski, T.
    Bergmann, F. S.
    Berlowski, M.
    Bhatt, H.
    Brinkmann, K. -T
    Buescher, M.
    Calén, Hans
    Uppsala University, Disciplinary Domain of Science and Technology, Physics, Department of Physics and Astronomy, Nuclear Physics.
    Clement, H.
    Coderre, D.
    Czerwinski, E.
    Demmich, K.
    Doroshkevich, E.
    Engels, R.
    Erven, W.
    Eyrich, W.
    Fedorets, P.
    Foehl, K.
    Fransson, Kjell
    Uppsala University, Disciplinary Domain of Science and Technology, Physics, Department of Physics and Astronomy, Nuclear Physics.
    Goldenbaum, F.
    Goslawski, P.
    Grigoryev, K.
    Gullström, Carl-Oscar
    Uppsala University, Disciplinary Domain of Science and Technology, Physics, Department of Physics and Astronomy, Nuclear Physics.
    Hauenstein, F.
    Heijkenskjöld, Lena
    Uppsala University, Disciplinary Domain of Science and Technology, Physics, Department of Physics and Astronomy, Nuclear Physics.
    Hejny, V.
    Hinterberger, F.
    Hodana, M.
    Höistad, Bo
    Uppsala University, Disciplinary Domain of Science and Technology, Physics, Department of Physics and Astronomy, Nuclear Physics.
    Husmann, C.
    Jany, A.
    Jany, B. R.
    Jarczyk, L.
    Johansson, Tord
    Uppsala University, Disciplinary Domain of Science and Technology, Physics, Department of Physics and Astronomy, Nuclear Physics.
    Kamys, B.
    Kemmerling, G.
    Khan, F. A.
    Khoukaz, A.
    Kistryn, S.
    Klaja, J.
    Kleines, H.
    Klos, B.
    Krzemien, W.
    Kulessa, P.
    Kupsc, Andrzej
    Uppsala University, Disciplinary Domain of Science and Technology, Physics, Department of Physics and Astronomy, Nuclear Physics.
    Lalwani, K.
    Lersch, D.
    Li, L.
    Lorentz, B.
    Magiera, A.
    Maier, R.
    Marciniewski, Pawel
    Uppsala University, Disciplinary Domain of Science and Technology, Physics, Department of Physics and Astronomy, Nuclear Physics.
    Marianski, B.
    Mikirtychiants, M.
    Morsch, H. -P
    Moskal, P.
    Nandi, B. K.
    Niedzwiecki, S.
    Ohm, H.
    Ozerianska, I.
    Pauly, C.
    del Rio, E. Perez
    Petukhov, Y.
    Plucinski, Pawel
    Uppsala University, Disciplinary Domain of Science and Technology, Physics, Department of Physics and Astronomy, Nuclear Physics.
    Podkopal, P.
    Prasuhn, D.
    Pricking, A.
    Pszczel, D.
    Pysz, K.
    Pyszniak, Andzej
    Uppsala University, Disciplinary Domain of Science and Technology, Physics, Department of Physics and Astronomy, Nuclear Physics.
    Redmer, Christoph F.
    Uppsala University, Disciplinary Domain of Science and Technology, Physics, Department of Physics and Astronomy, Nuclear Physics.
    Ritman, J.
    Roy, A.
    Rudy, Z.
    Sawant, S.
    Schadmand, S.
    Schmidt, A.
    Serdyuk, V.
    Shah, N.
    Siudak, R.
    Skorodko, T.
    Skurzok, M.
    Smyrski, J.
    Sopov, V.
    Stassen, R.
    Stepaniak, J.
    Sterzenbach, G.
    Stockhorst, H.
    Stroeher, H.
    Szczurek, A.
    Tolba, T.
    Trzcinski, A.
    Varma, R.
    Vlasov, P.
    Wagner, G. J.
    Weglorz, W.
    Wolke, Magnus
    Uppsala University, Disciplinary Domain of Science and Technology, Physics, Department of Physics and Astronomy, Nuclear Physics.
    Wronska, A.
    Wuestner, P.
    Wurm, P.
    Yamamoto, A.
    Yuan, X.
    Yurev, L.
    Zabierowski, J.
    Zheng, C.
    Zielinski, M. J.
    Zipper, W.
    Zlomanczuk, Jozef
    Uppsala University, Disciplinary Domain of Science and Technology, Physics, Department of Physics and Astronomy, Nuclear Physics.
    Zupranski, P.
    Abashian-Booth-Crowe resonance structure in the double pionic fusion to He-42012In: Physical Review C. Nuclear Physics, ISSN 0556-2813, E-ISSN 1089-490X, Vol. 86, no 3, p. 032201-Article in journal (Refereed)
    Abstract [en]

    Exclusive and kinematically complete high-statistics measurements of the double pionic fusion reaction dd -> He-4 pi(0)pi(0) have been performed in the energy range 0.8-1.4 GeV covering thus the region of the Abashian-Booth-Crowe effect, which denotes a pronounced low-mass enhancement in the pi pi invariant mass spectrum. The experiments were carried out with the WASA detector setup at the cooler synchrotron at Forshungszentrum Julich GmbH. Similar to the observation in the basic pn -> d pi(0)pi(0) reaction, the data reveal a correlation between the ABC effect and a resonancelike energy dependence in the total cross section. The maximum occurs at m = 2.37 GeV + 2m(N), i.e., at the same position as in the basic reaction. The observed resonance width Gamma approximate to 160 MeV can be understood from broadening due to Fermi motion of the nucleons in initial and final nuclei together with collision damping. Differential cross sections are described equally well by the hypothesis of a pn resonance formation during the reaction process.

  • 206.
    Adlarson, Patrik
    et al.
    Uppsala University, Disciplinary Domain of Science and Technology, Physics, Department of Physics and Astronomy, Nuclear Physics.
    Augustyniak, W.
    Bardan, W.
    Bashkanov, M.
    Bednarski, T.
    Bergmann, F. S.
    Berlowski, M.
    Bhatt, H.
    Buescher, M.
    Calén, Hans
    Uppsala University, Disciplinary Domain of Science and Technology, Physics, Department of Physics and Astronomy, Nuclear Physics.
    Clement, H.
    Coderre, D.
    Czerwinski, E.
    Demmich, K.
    Doroshkevich, E.
    Engels, R.
    Erven, W.
    Eyrich, W.
    Fedorets, P.
    Foehl, K.
    Fransson, Kjell
    Uppsala University, Disciplinary Domain of Science and Technology, Physics, Department of Physics and Astronomy, Nuclear Physics.
    Goldenbaum, F.
    Goslawski, P.
    Goswami, A.
    Grigoryev, K.
    Gullström, Carl-Oscar
    Uppsala University, Disciplinary Domain of Science and Technology, Physics, Department of Physics and Astronomy, Nuclear Physics.
    Hauenstein, F.
    Heijkenskjöld, Lena
    Uppsala University, Disciplinary Domain of Science and Technology, Physics, Department of Physics and Astronomy, Nuclear Physics.
    Hejny, V.
    Hinterberger, F.
    Hodana, M.
    Hoistad, Bo
    Uppsala University, Disciplinary Domain of Science and Technology, Physics, Department of Physics and Astronomy, Nuclear Physics.
    Jany, A.
    Jany, B. R.
    Jarczyk, L.
    Johansson, Tord
    Uppsala University, Disciplinary Domain of Science and Technology, Physics, Department of Physics and Astronomy, Nuclear Physics.
    Kamys, B.
    Kemmerling, G.
    Khan, F. A.
    Khoukaz, A.
    Kistryn, S.
    Klaja, J.
    Kleines, H.
    Uppsala University, Disciplinary Domain of Science and Technology, Physics, Department of Physics and Astronomy, Nuclear Physics.
    Klos, B.
    Krapp, M.
    Krzemien, W.
    Kulessa, P.
    Kupsc, Andrzej
    Uppsala University, Disciplinary Domain of Science and Technology, Physics, Department of Physics and Astronomy, Nuclear Physics.
    Lalwani, K.
    Lersch, D.
    Li, L.
    Lorentz, B.
    Magiera, A.
    Maier, R.
    Marciniewski, Pawel
    Uppsala University, Disciplinary Domain of Science and Technology, Physics, Department of Physics and Astronomy, Nuclear Physics.
    Marianski, B.
    Mikirtychiants, M.
    Morsch, H. -P
    Moskal, P.
    Nandi, B. K.
    Niedzwiecki, S.
    Ohm, H.
    Ozerianska, I.
    del Rio, E. Perez
    Plucinski, P.
    Uppsala University, Disciplinary Domain of Science and Technology, Physics, Department of Physics and Astronomy, Nuclear Physics.
    Podkopal, P.
    Prasuhn, D.
    Pricking, A.
    Pszczel, Damian
    Uppsala University, Disciplinary Domain of Science and Technology, Physics, Department of Physics and Astronomy, Nuclear Physics.
    Pysz, K.
    Pyszniak, Andrzej
    Uppsala University, Disciplinary Domain of Science and Technology, Physics, Department of Physics and Astronomy, Nuclear Physics.
    Redmer, C. F.
    Uppsala University, Disciplinary Domain of Science and Technology, Physics, Department of Physics and Astronomy, Nuclear Physics.
    Ritman, J.
    Roy, A.
    Rudy, Z.
    Sawant, S.
    Schadmand, S.
    Schmidt, A.
    Sefzick, T.
    Serdyuk, V.
    Shah, N.
    Siemaszko, M.
    Siudak, R.
    Skorodko, T.
    Skurzok, M.
    Smyrski, J.
    Sopov, V.
    Stassen, R.
    Stepaniak, J.
    Stephan, E.
    Sterzenbach, G.
    Stockhorst, H.
    Stroeher, H.
    Szczurek, A.
    Tolba, T.
    Trzcinski, A.
    Varma, R.
    Vlasov, P.
    Wagner, G. J.
    Weglorz, W.
    Wolke, Magnus
    Uppsala University, Disciplinary Domain of Science and Technology, Physics, Department of Physics and Astronomy, Nuclear Physics.
    Wronska, A.
    Wuestner, P.
    Wurm, P.
    Yamamoto, A.
    Yuan, X.
    Yurev, L.
    Zabierowski, J.
    Zheng, C.
    Zielinski, M. J.
    Zipper, W.
    Zlomanczuk, Jozef
    Uppsala University, Disciplinary Domain of Science and Technology, Physics, Department of Physics and Astronomy, Nuclear Physics.
    Zupranski, P.
    Zurek, M.
    Search for eta-mesic He-4 with the WASA-at-COSY detector2013In: Physical Review C. Nuclear Physics, ISSN 0556-2813, E-ISSN 1089-490X, Vol. 87, no 3, p. 035204-Article in journal (Refereed)
    Abstract [en]

    An exclusive measurement of the excitation function for the dd -> (3)Hep pi(-) reaction was performed at the Cooler Synchrotron COSY-Julich with the WASA-at-COSY detection system. The data were taken during a slow acceleration of the beam from 2.185 to 2.400 GeV/c crossing the kinematic threshold for the eta-meson production in the dd -> He-4 eta reaction at 2.336 GeV/c. The corresponding excess energy with respect to the He-4-eta system varied from -51.4 to 22 MeV. The integrated luminosity in the experiment was determined using the dd -> (3)Hen reaction. The shape of the excitation function for the dd -> (3)Hep pi(-) reaction was examined. No signal of the He-4-eta bound state was observed. An upper limit for the cross section for the bound state formation and decay in the process dd -> (He-4-eta)(bound) -> (3)Hep pi(-) was determined on the 90% confidence level and it varies from 20 to 27 nb for the bound state width ranging from 5 to 35 MeV, respectively. 

  • 207.
    Adlarson, Patrik
    et al.
    Uppsala University, Disciplinary Domain of Science and Technology, Physics, Department of Physics and Astronomy, Nuclear Physics.
    Augustyniak, W.
    Natl Ctr Nucl Res, Dept Nucl Phys, Ul Hoza 69, PL-00681 Warsaw, Poland..
    Bardan, W.
    Jagiellonian Univ, Inst Phys, Prof Stanislawa Lojasiewicza 11, PL-30348 Krakow, Poland..
    Bashkanov, M.
    Univ Edinburgh, Sch Phys & Astron, James Clerk Maxwell Bldg,Peter Guthrie Tait Rd, Edinburgh EH9 3FD, Midlothian, Scotland..
    Bergmann, F. S.
    Westfalische Wilhelms Univ Munster, Inst Kernphys, Wilhelm Klemm Str 9, D-48149 Munster, Germany..
    Berlowski, M.
    Natl Ctr Nucl Res, High Energy Phys Dept, Ul Hoza 69, PL-00681 Warsaw, Poland..
    Bhatt, H.
    Indian Inst Technol, Dept Phys, Bombay 400076, Maharashtra, India..
    Bondar, A.
    SB RAS, Budker Inst Nucl Phys, 11 Akademika Lavrentieva Prospect, Novosibirsk 630090, Russia.;Novosibirsk State Univ, 2 Pirogova Str, Novosibirsk 630090, Russia..
    Buescher, M.
    Forschungszentrum Julich, Inst Kernphys, D-52425 Julich, Germany.;Forschungszentrum Julich, Peter Grunberg Inst, PGI Elekt Eigenschaften 6, D-52425 Julich, Germany.;Heinrich Heine Univ Dusseldorf, Inst Laser & Plasmaphys, Univ Str 1, D-40225 Dusseldorf, Germany..
    Calen, H.
    Uppsala Univ, Dept Phys & Astron, Div Nucl Phys, Box 516, S-75120 Uppsala, Sweden..
    Ciepal, I.
    Polish Acad Sci, Henryk Niewodniczanski Inst Nucl Phys, 152 Radzikowskiego St, PL-31342 Krakow, Poland..
    Clement, H.
    Eberhard Karls Univ Tubingen, Phys Inst, Morgenstelle 14, D-72076 Tubingen, Germany.;Eberhard Karls Univ Tubingen, Kepler Ctr Astro & Particle Phys, Morgenstelle 14, D-72076 Tubingen, Germany..
    Czerwinski, E.
    Jagiellonian Univ, Inst Phys, Prof Stanislawa Lojasiewicza 11, PL-30348 Krakow, Poland..
    Demmich, K.
    Westfalische Wilhelms Univ Munster, Inst Kernphys, Wilhelm Klemm Str 9, D-48149 Munster, Germany..
    Engels, R.
    Forschungszentrum Julich, Inst Kernphys, D-52425 Julich, Germany..
    Erven, A.
    Forschungszentrum Julich, Zent Inst Engn Elekt & Analyt, D-52425 Julich, Germany..
    Erven, W.
    Forschungszentrum Julich, Zent Inst Engn Elekt & Analyt, D-52425 Julich, Germany..
    Eyrich, W.
    Friedrich Alexander Univ Erlangen Nurnberg, Phys Inst, Erwin Rommel Str 1, D-91058 Erlangen, Germany..
    Fedorets, P.
    State Sci Ctr Russian Federat, Inst Theoret & Expt Phys, Bolshaya Cheremushkinskaya 25, Moscow 117218, Russia..
    Foehl, K.
    Justus Liebig Univ Giessen, Phys Inst 2, Heinrich Buff Ring 16, D-35392 Giessen, Germany..
    Fransson, Kjell
    Uppsala University, Disciplinary Domain of Science and Technology, Physics, Department of Physics and Astronomy, Nuclear Physics.
    Goldenbaum, F.
    Forschungszentrum Julich, Inst Kernphys, D-52425 Julich, Germany..
    Goswami, A.
    Indian Inst Technol Indore, Dept Phys, Khandwa Rd, Indore 452017, Madhya Pradesh, India..
    Grigoryev, K.
    Petersburg Nucl Phys Inst, High Energy Phys Div, Orlova Rosha 2, Gatchina 188300, Russia.;Rhein Westfal TH Aachen, Phys Inst B 3, Physikzentrum, D-52056 Aachen, Germany..
    Gullström, Carl-Oskar
    Uppsala University, Disciplinary Domain of Science and Technology, Physics, Department of Physics and Astronomy, Nuclear Physics.
    Heijkenskjöld, Lena
    Uppsala University, Disciplinary Domain of Science and Technology, Physics, Department of Physics and Astronomy, Nuclear Physics.
    Hejny, V.
    Forschungszentrum Julich, Inst Kernphys, D-52425 Julich, Germany..
    Huesken, N.
    Westfalische Wilhelms Univ Munster, Inst Kernphys, Wilhelm Klemm Str 9, D-48149 Munster, Germany..
    Jarczyk, L.
    Jagiellonian Univ, Inst Phys, Prof Stanislawa Lojasiewicza 11, PL-30348 Krakow, Poland..
    Johansson, Tord
    Uppsala University, Disciplinary Domain of Science and Technology, Physics, Department of Physics and Astronomy, Nuclear Physics.
    Kamys, B.
    Jagiellonian Univ, Inst Phys, Prof Stanislawa Lojasiewicza 11, PL-30348 Krakow, Poland..
    Kemmerling, G.
    Forschungszentrum Julich, JCNS, D-52425 Julich, Germany..
    Khatri, G.
    Jagiellonian Univ, Inst Phys, Prof Stanislawa Lojasiewicza 11, PL-30348 Krakow, Poland.;Harvard Univ, Dept Phys, 17 Oxford St, Cambridge, MA 02138 USA..
    Khoukaz, A.
    Westfalische Wilhelms Univ Munster, Inst Kernphys, Wilhelm Klemm Str 9, D-48149 Munster, Germany..
    Khreptak, O.
    Jagiellonian Univ, Inst Phys, Prof Stanislawa Lojasiewicza 11, PL-30348 Krakow, Poland..
    Kirillov, D. A.
    Joint Inst Nucl Res, Veksler & Baldin Lab High Energiy Phys, Joliot Curie 6, Dubna 141980, Moscow, Russia..
    Kistryn, S.
    Jagiellonian Univ, Inst Phys, Prof Stanislawa Lojasiewicza 11, PL-30348 Krakow, Poland..
    Kleines, H.
    Forschungszentrum Julich, Zent Inst Engn Elekt & Analyt, D-52425 Julich, Germany..
    Klos, B.
    Univ Silesian, August Chelkowski Inst Phys, Uniwersytecka 4, PL-40007 Katowice, Poland..
    Krzemien, W.
    Jagiellonian Univ, Inst Phys, Prof Stanislawa Lojasiewicza 11, PL-30348 Krakow, Poland..
    Kulessa, P.
    Polish Acad Sci, Henryk Niewodniczanski Inst Nucl Phys, 152 Radzikowskiego St, PL-31342 Krakow, Poland..
    Kupsc, Andrzej
    Uppsala University, Disciplinary Domain of Science and Technology, Physics, Department of Physics and Astronomy, Nuclear Physics. Natl Ctr Nucl Res, High Energy Phys Dept, Ul Hoza 69, PL-00681 Warsaw, Poland..
    Kuzmin, A.
    Novosibirsk State Univ, 2 Pirogova Str, Novosibirsk 630090, Russia..
    Lalwani, K.
    Malaviya Natl Inst Technol Jaipur, Dept Phys, Jaipur 302017, Rajasthan, India..
    Lersch, D.
    Forschungszentrum Julich, Inst Kernphys, D-52425 Julich, Germany..
    Lorentz, B.
    Forschungszentrum Julich, Inst Kernphys, D-52425 Julich, Germany..
    Magiera, A.
    Jagiellonian Univ, Inst Phys, Prof Stanislawa Lojasiewicza 11, PL-30348 Krakow, Poland..
    Maier, R.
    Forschungszentrum Julich, Inst Kernphys, D-52425 Julich, Germany.;JARA FAME, Julich Aachen Res Alliance, Forschungszentrum Julich, Julich, Germany.;Rhein Westfal TH Aachen, D-52056 Aachen, Germany..
    Marciniewski, Pawel
    Uppsala University, Disciplinary Domain of Science and Technology, Physics, Department of Physics and Astronomy, Nuclear Physics.
    Marianski, B.
    Natl Ctr Nucl Res, Dept Nucl Phys, Ul Hoza 69, PL-00681 Warsaw, Poland..
    Morsch, H. -P
    Moskal, P.
    Jagiellonian Univ, Inst Phys, Prof Stanislawa Lojasiewicza 11, PL-30348 Krakow, Poland..
    Ohm, H.
    Forschungszentrum Julich, Inst Kernphys, D-52425 Julich, Germany..
    Parol, W.
    Polish Acad Sci, Henryk Niewodniczanski Inst Nucl Phys, 152 Radzikowskiego St, PL-31342 Krakow, Poland..
    del Rio, E. Perez
    Eberhard Karls Univ Tubingen, Phys Inst, Morgenstelle 14, D-72076 Tubingen, Germany.;Eberhard Karls Univ Tubingen, Kepler Ctr Astro & Particle Phys, Morgenstelle 14, D-72076 Tubingen, Germany.;INFN, Lab Nazl Frascati, Via Fermi 40, I-00044 Rome, Italy..
    Piskunov, N. M.
    Joint Inst Nucl Res, Veksler & Baldin Lab High Energiy Phys, Joliot Curie 6, Dubna 141980, Moscow, Russia..
    Prasuhn, D.
    Forschungszentrum Julich, Inst Kernphys, D-52425 Julich, Germany..
    Pszczel, Damian
    Uppsala University, Disciplinary Domain of Science and Technology, Physics, Department of Physics and Astronomy, Nuclear Physics. Natl Ctr Nucl Res, High Energy Phys Dept, Ul Hoza 69, PL-00681 Warsaw, Poland..
    Pysz, K.
    Polish Acad Sci, Henryk Niewodniczanski Inst Nucl Phys, 152 Radzikowskiego St, PL-31342 Krakow, Poland..
    Pyszniak, A.
    Uppsala University, Disciplinary Domain of Science and Technology, Physics, Department of Physics and Astronomy, Nuclear Physics. Jagiellonian Univ, Inst Phys, Prof Stanislawa Lojasiewicza 11, PL-30348 Krakow, Poland..
    Ritman, J.
    JARA FAME, Julich Aachen Res Alliance, Forschungszentrum Julich, Julich, Germany.;Rhein Westfal TH Aachen, D-52056 Aachen, Germany.;Ruhr Univ Bochum, Inst Expt Phys 1, Univ Str 150, D-44780 Bochum, Germany..
    Roy, A.
    Indian Inst Technol Indore, Dept Phys, Khandwa Rd, Indore 452017, Madhya Pradesh, India..
    Rudy, Z.
    Jagiellonian Univ, Inst Phys, Prof Stanislawa Lojasiewicza 11, PL-30348 Krakow, Poland..
    Rundel, O.
    Jagiellonian Univ, Inst Phys, Prof Stanislawa Lojasiewicza 11, PL-30348 Krakow, Poland..
    Sawant, S.
    Forschungszentrum Julich, Inst Kernphys, D-52425 Julich, Germany..
    Schadmand, S.
    Forschungszentrum Julich, Inst Kernphys, D-52425 Julich, Germany..
    Schatti-Ozerianska, I.
    Jagiellonian Univ, Inst Phys, Prof Stanislawa Lojasiewicza 11, PL-30348 Krakow, Poland..
    Sefzick, T.
    Forschungszentrum Julich, Inst Kernphys, D-52425 Julich, Germany..
    Serdyuk, V.
    Forschungszentrum Julich, Inst Kernphys, D-52425 Julich, Germany..
    Shwartz, B.
    Novosibirsk State Univ, 2 Pirogova Str, Novosibirsk 630090, Russia..
    Sitterberg, K.
    Westfalische Wilhelms Univ Munster, Inst Kernphys, Wilhelm Klemm Str 9, D-48149 Munster, Germany..
    Skorodko, T.
    Eberhard Karls Univ Tubingen, Phys Inst, Morgenstelle 14, D-72076 Tubingen, Germany.;Tomsk State Univ, Dept Phys, 36 Lenina Ave, Tomsk 634050, Russia..
    Skurzok, M.
    Jagiellonian Univ, Inst Phys, Prof Stanislawa Lojasiewicza 11, PL-30348 Krakow, Poland..
    Smyrski, J.
    Jagiellonian Univ, Inst Phys, Prof Stanislawa Lojasiewicza 11, PL-30348 Krakow, Poland..
    Sopov, V.
    State Sci Ctr Russian Federat, Inst Theoret & Expt Phys, Bolshaya Cheremushkinskaya 25, Moscow 117218, Russia..
    Stassen, R.
    Forschungszentrum Julich, Inst Kernphys, D-52425 Julich, Germany..
    Stepaniak, J.
    Natl Ctr Nucl Res, High Energy Phys Dept, Ul Hoza 69, PL-00681 Warsaw, Poland..
    Stephan, E. u
    Univ Silesian, August Chelkowski Inst Phys, Uniwersytecka 4, PL-40007 Katowice, Poland..
    Sterzenbach, G.
    Forschungszentrum Julich, Inst Kernphys, D-52425 Julich, Germany..
    Stockhorst, H.
    Forschungszentrum Julich, Inst Kernphys, D-52425 Julich, Germany..
    Stroeher, H.
    Forschungszentrum Julich, Inst Kernphys, D-52425 Julich, Germany.;JARA FAME, Julich Aachen Res Alliance, Forschungszentrum Julich, Julich, Germany.;Rhein Westfal TH Aachen, D-52056 Aachen, Germany..
    Szczurek, A.
    Polish Acad Sci, Henryk Niewodniczanski Inst Nucl Phys, 152 Radzikowskiego St, PL-31342 Krakow, Poland..
    Trzcinski, A.
    Natl Ctr Nucl Res, Dept Nucl Phys, Ul Hoza 69, PL-00681 Warsaw, Poland..
    Varma, R.
    Wolke, Magnus
    Uppsala University, Disciplinary Domain of Science and Technology, Physics, Department of Physics and Astronomy, Nuclear Physics.
    Wronska, A.
    Jagiellonian Univ, Inst Phys, Prof Stanislawa Lojasiewicza 11, PL-30348 Krakow, Poland..
    Wuestner, P.
    Forschungszentrum Julich, Zent Inst Engn Elekt & Analyt, D-52425 Julich, Germany..
    Yamamoto, A.
    KEK, High Energy Accelerator Res Org, Tsukuba, Ibaraki 3050801, Japan..
    Zabierowski, J.
    Natl Ctr Nucl Res, Dept Astrophys, Box 447, PL-90950 Lodz, Poland. Rheinische Friedrich Wilhelms Univ Bonn, Helmholtz Inst Strahlen & Kernphys, Nussallee 14-16, D-53115 Bonn, Germany..
    Zielinski, M. J.
    Jagiellonian Univ, Inst Phys, Prof Stanislawa Lojasiewicza 11, PL-30348 Krakow, Poland..
    Zlomanczuk, Jozef
    Uppsala University, Disciplinary Domain of Science and Technology, Physics, Department of Physics and Astronomy, Nuclear Physics.
    Zupranski, P.
    Natl Ctr Nucl Res, Dept Nucl Phys, Ul Hoza 69, PL-00681 Warsaw, Poland..
    Zurekj, M.
    Forschungszentrum Julich, Inst Kernphys, D-52425 Julich, Germany..
    Isoscalar single-pion production in the region of Roper and d*(2380) resonances2017In: Physics Letters B, ISSN 0370-2693, E-ISSN 1873-2445, Vol. 774, p. 599-607Article in journal (Refereed)
    Abstract [en]

    Exclusive measurements of the quasi-free pn -> pp pi(-) and pp -> pp pi(0) reactions have been performed by means of pd collisions at T-p= 1.2 GeV using the WASA detector setup at COSY. Total and differential cross sections have been obtained covering the energy region T-p= 0.95-1.3 GeV (root s = 2.3-2.46 GeV), which includes the regions of triangle(1232), N*(1440) and d*(2380) resonance excitations. From these measurements the isoscalar single-pion production has been extracted, for which data existed so far only below T-p = 1 GeV. We observe a substantial increase of this cross section around 1 GeV, which can be related to the Roper resonance N*(1440), the strength of which shows up isolated from the triangle resonance in the isoscalar (N pi)(I=0) invariant-mass spectrum. No evidence for a decay of the dibaryon resonance d*(2380) into the isoscalar (NN pi)(I=0) channel is found. An upper limit of 180 mu b (90% CL.) corresponding to a branching ratio of 9% has been deduced.

  • 208.
    Adlarson, Patrik
    et al.
    Uppsala University, Disciplinary Domain of Science and Technology, Physics, Department of Physics and Astronomy, Nuclear Physics.
    Augustyniak, W.
    Bardan, W.
    Bashkanov, M.
    Bergmann, F. S.
    Berlowski, M.
    Bhatt, H.
    Bondar, A.
    Buescher, M.
    Calén, Hans
    Uppsala University, Disciplinary Domain of Science and Technology, Physics, Department of Physics and Astronomy, Nuclear Physics.
    Ciepal, I.
    Clement, H.
    Coderre, D.
    Czerwinski, E.
    Demmich, K.
    Doroshkevich, E.
    Engels, R.
    Erven, A.
    Erven, W.
    Eyrich, W.
    Fedorets, P.
    Foehl, K.
    Fransson, Kjell E.
    Uppsala University, Disciplinary Domain of Science and Technology, Physics, Department of Physics and Astronomy, Nuclear Physics.
    Goldenbaum, F.
    Goslawski, P.
    Goswami, A.
    Grigoryev, K.
    Gullstrlöm, Carl-Oscar
    Uppsala University, Disciplinary Domain of Science and Technology, Physics, Department of Physics and Astronomy, Nuclear Physics.
    Hauenstein, F.
    Heijkenskjold, Lena
    Uppsala University, Disciplinary Domain of Science and Technology, Physics, Department of Physics and Astronomy, Nuclear Physics.
    Hejny, V.
    Höistad, Bo
    Uppsala University, Disciplinary Domain of Science and Technology, Physics, Department of Physics and Astronomy, Nuclear Physics.
    Huesken, N.
    Jarczyk, L.
    Johansson, Tord
    Uppsala University, Disciplinary Domain of Science and Technology, Physics, Department of Physics and Astronomy, Nuclear Physics.
    Kamys, B.
    Kemmerling, G.
    Khan, F. A.
    Khoukaz, A.
    Kirillov, D. A.
    Kistryn, S.
    Kleines, H.
    Klos, B.
    Krzemien, W.
    Kulessa, P.
    Kupsc, Anrezej
    Uppsala University, Disciplinary Domain of Science and Technology, Physics, Department of Physics and Astronomy, Nuclear Physics.
    Kuzmin, A.
    Lalwani, K.
    Lersch, D.
    Lorentz, B.
    Magiera, A.
    Maier, R.
    Marciniewski, Pavel
    Uppsala University, Disciplinary Domain of Science and Technology, Physics, Department of Physics and Astronomy, Nuclear Physics.
    Marianski, B.
    Mikirtychiants, M.
    Morsch, H. -P
    Moskal, P.
    Ohm, H.
    Ozerianska, I.
    del Rio, E. Perez
    Piskunov, N. M.
    Podkopal, P.
    Prasuhn, D.
    Pricking, A.
    Pszczel, Damian
    Uppsala University, Disciplinary Domain of Science and Technology, Physics, Department of Physics and Astronomy, Nuclear Physics.
    Pysz, K.
    Pyszniak, Andrzej
    Uppsala University, Disciplinary Domain of Science and Technology, Physics, Department of Physics and Astronomy, Nuclear Physics.
    Ritman, J.
    Roy, A.
    Rudy, Z.
    Sawant, S.
    Schadmand, S.
    Sefzick, T.
    Serdyuk, V.
    Shwartz, B.
    Siudak, R.
    Skorodko, T.
    Skurzok, M.
    Smyrski, J.
    Sopov, V.
    Stassen, R.
    Stepaniak, J.
    Stephan, E.
    Sterzenbach, G.
    Stockhorst, H.
    Stroeher, H.
    Szczurek, A.
    Taeschner, A.
    Trzcinski, A.
    Varma, R.
    Wagner, G. J.
    Wolke, Magnus
    Uppsala University, Disciplinary Domain of Science and Technology, Physics, Department of Physics and Astronomy, Nuclear Physics.
    Wronska, A.
    Wuestner, P.
    Wurm, P.
    Yamamoto, A.
    Yurev, L.
    Zabierowski, J.
    Zielinski, M. J.
    Zink, A.
    Zlomanczuk, Josef
    Uppsala University, Disciplinary Domain of Science and Technology, Physics, Department of Physics and Astronomy, Nuclear Physics.
    Zupranski, P.
    Zurek, M.
    ABC effect and resonance structure in the double-pionic fusion to He-32015In: Physical Review C. Nuclear Physics, ISSN 0556-2813, E-ISSN 1089-490X, Vol. 91, no 1, p. 015201-Article in journal (Refereed)
    Abstract [en]

    Exclusive and kinematically complete measurements of the double pionic fusion to He-3 have been performed in the energy region of the so-called ABC effect, which denotes a pronounced low-mass enhancement in the pi pi-invariant mass spectrum. The experiments were carried out with the WASA detector setup at COSY (the cooler synchrotron at Forschungszentrum Julich). Similar to the observations in the basic pn -> d pi(0)pi(0) reaction and in the dd -> He-4 pi(0)pi(0) reaction, the data reveal a correlation between the ABC effect and a resonance-like energy dependence in the total cross section. Differential cross sections are well described by the hypothesis of d* resonance formation during the reaction process in addition to the conventional t-channel Delta Delta mechanism. The deduced d* resonance width can be understood from collision broadening due to Fermi motion of the nucleons in initial and final nuclei.

  • 209.
    Adlarson, Patrik
    et al.
    Uppsala University, Disciplinary Domain of Science and Technology, Physics, Department of Physics and Astronomy, Nuclear Physics.
    Augustyniak, W.
    Bardan, W.
    Bashkanov, M.
    Bergmann, F. S.
    Berlowski, M.
    Bhatt, H.
    Bondar, A.
    Buescher, M.
    Calén, Hans
    Uppsala University, Disciplinary Domain of Science and Technology, Physics, Department of Physics and Astronomy, Nuclear Physics.
    Ciepal, I.
    Clement, H.
    Coderre, D.
    Czerwinski, E.
    Demmich, K.
    Doroshkevich, E.
    Engels, R.
    Erven, A.
    Erven, W.
    Eyrich, W.
    Fedorets, P.
    Foehl, K.
    Fransson, Kjell E. I.
    Uppsala University, Disciplinary Domain of Science and Technology, Physics, Department of Physics and Astronomy, Nuclear Physics.
    Goldenbaum, F.
    Goslawski, P.
    Goswami, A.
    Grigoryev, K.
    Gullström, Carl-Oscar
    Uppsala University, Disciplinary Domain of Science and Technology, Physics, Department of Physics and Astronomy, Nuclear Physics.
    Hanhart, C.
    Hauenstein, F.
    Heijkenskjöld, Lena
    Uppsala University, Disciplinary Domain of Science and Technology, Physics, Department of Physics and Astronomy, Nuclear Physics.
    Hejny, V.
    Höistad, Bo
    Uppsala University, Disciplinary Domain of Science and Technology, Physics, Department of Physics and Astronomy, Nuclear Physics.
    Huesken, N.
    Jarczyk, L.
    Johansson, Tord
    Uppsala University, Disciplinary Domain of Science and Technology, Physics, Department of Physics and Astronomy, Nuclear Physics.
    Kamys, B.
    Kemmerling, G.
    Khan, F. A.
    Khoukaz, A.
    Kirillov, D. A.
    Kistryn, S.
    Kleines, H.
    Klos, B.
    Krzemien, W.
    Kulessa, P.
    Kupsc, Andrzej
    Uppsala University, Disciplinary Domain of Science and Technology, Physics, Department of Physics and Astronomy, Nuclear Physics.
    Kuzmin, A.
    Lalwani, K.
    Lersch, D.
    Lorentz, B.
    Magiera, A.
    Maier, R.
    Marciniewski, Pawel
    Uppsala University, Disciplinary Domain of Science and Technology, Physics, Department of Physics and Astronomy, Nuclear Physics.
    Marianski, B.
    Mikirtychiants, M.
    Morsch, H. -P
    Moskal, P.
    Ohm, H.
    Ozerianska, I.
    del Rio, E. Perez
    Piskunov, N. M.
    Podkopal, P.
    Prasuhn, D.
    Pricking, A.
    Pszczel, Damian
    Uppsala University, Disciplinary Domain of Science and Technology, Physics, Department of Physics and Astronomy, Nuclear Physics.
    Pyszw, K.
    Pyszniak, Andrzej
    Uppsala University, Disciplinary Domain of Science and Technology, Physics, Department of Physics and Astronomy, Nuclear Physics.
    Redmer, C. F.
    Uppsala University, Disciplinary Domain of Science and Technology, Physics, Department of Physics and Astronomy, Nuclear Physics.
    Ritman, J.
    Roy, A.
    Rudy, Z.
    Sawant, S.
    Schadmand, S.
    Sefzick, T.
    Serdyuk, V.
    Shwartz, B.
    Siudak, R.
    Skorodko, T.
    Skurzok, M.
    Smyrski, J.
    Sopov, V.
    Stassen, R.
    Stepaniak, J.
    Stephan, E.
    Sterzenbach, G.
    Stockhorst, H.
    Stroher, H.
    Szczurek, A.
    Taschner, A.
    Trzcinski, A.
    Varma, R.
    Wolke, Magnus
    Uppsala University, Disciplinary Domain of Science and Technology, Physics, Department of Physics and Astronomy, Nuclear Physics.
    Wronska, A.
    Wustner, P.
    Wurm, P.
    Yamamoto, A.
    Yurev, L.
    Zabierowski, J.
    Zielinski, M. J.
    Zink, A.
    Zlomanczuk, Jozef
    Uppsala University, Disciplinary Domain of Science and Technology, Physics, Department of Physics and Astronomy, Nuclear Physics.
    Zupranski, P.
    Zurek, M.
    Charge symmetry breaking in dd -> He-4 pi(0) with WASA-at-COSY2014In: Physics Letters B, ISSN 0370-2693, E-ISSN 1873-2445, Vol. 739, p. 44-49Article in journal (Refereed)
    Abstract [en]

    Charge symmetry breaking (CSB) observables are a suitable experimental tool to examine effects induced by quark masses on the nuclear level. Previous high precision data from TRIUMF and IUCF are currently used to develop a consistent description of CSB within the framework of chiral perturbation theory. In this work the experimental studies on the reaction dd -> He-4 pi(0) have been extended towards higher excess energies in order to provide information on the contribution of p-waves in the final state. For this, an exclusive measurement has been carried out at a beam momentum of p(d) = 1.2GeV/c using the WASA-at-COSY facility. The total cross section amounts to sigma(tot) =(118 +/- 18(stat) +/- 13(sys) +/- 8(ext)) p band first data on the differential cross section are consistent with s-wave pion production.

  • 210.
    Adlarson, Patrik
    et al.
    Uppsala University, Disciplinary Domain of Science and Technology, Physics, Department of Physics and Astronomy, Nuclear Physics.
    Augustyniak, W.
    Bardan, W.
    Bashkanov, M.
    Bergmann, F. S.
    Berlowski, M.
    Bhatt, H.
    Bondar, A.
    Buescher, M.
    Calén, Hans
    Uppsala University, Disciplinary Domain of Science and Technology, Physics, Department of Physics and Astronomy, Nuclear Physics.
    Ciepal, I.
    Clement, H.
    Coderre, D.
    Czerwinski, E.
    Demmich, K.
    Doroshkevich, E.
    Engels, R.
    Erven, A.
    Erven, W.
    Eyrich, W.
    Fedorets, P.
    Foehl, K.
    Fransson, Kjell
    Uppsala University, Disciplinary Domain of Science and Technology, Physics, Department of Physics and Astronomy, Nuclear Physics.
    Goldenbaum, F.
    Goslawski, P.
    Goswami, A.
    Grigoryev, K.
    Gullström, Carl-Oscar
    Uppsala University, Disciplinary Domain of Science and Technology, Physics, Department of Physics and Astronomy, Nuclear Physics.
    Hauenstein, F.
    Heijkenskjöld, Lena
    Uppsala University, Disciplinary Domain of Science and Technology, Physics, Department of Physics and Astronomy, Nuclear Physics.
    Hejny, V.
    Hodana, M.
    Höistad, Bo
    Huesken, N.
    Jany, A.
    Jany, B. R.
    Jarczyk, L.
    Johansson, Tord
    Uppsala University, Disciplinary Domain of Science and Technology, Physics, Department of Physics and Astronomy, Nuclear Physics.
    Kamys, B.
    Kemmerling, G.
    Khan, F. A.
    Khoukaz, A.
    Kirillov, D. A.
    Kistryn, S.
    Kleines, H.
    Klos, B.
    Krzemien, W.
    Kulessa, P.
    Kupsc, Andrzej
    Uppsala University, Disciplinary Domain of Science and Technology, Physics, Department of Physics and Astronomy, Nuclear Physics.
    Kuzmin, A.
    Lalwani, K.
    Lersch, D.
    Lorentz, B.
    Magiera, A.
    Maier, R.
    Marciniewski, Pawel
    Uppsala University, Disciplinary Domain of Science and Technology, Physics, Department of Physics and Astronomy, Nuclear Physics.
    Marianski, B.
    Martemyanov, B. V.
    Meissner, U-G
    Mikirtychiants, M.
    Morsch, H. -P
    Moskal, P.
    Ohm, H.
    Ozerianska, I.
    del Rio, E. Perez
    Piskunov, N. M.
    Podkopal, P.
    Prasuhn, D.
    Pricking, A.
    Pszczel, Damian
    Uppsala University, Disciplinary Domain of Science and Technology, Physics, Department of Physics and Astronomy, Nuclear Physics.
    Pysz, K.
    Pyszniak, Andrzej
    Uppsala University, Disciplinary Domain of Science and Technology, Physics, Department of Physics and Astronomy, Nuclear Physics.
    Redmer, C. F.
    Uppsala University, Disciplinary Domain of Science and Technology, Physics, Department of Physics and Astronomy, Nuclear Physics.
    Ritman, J.
    Roy, A.
    Rudy, Z.
    Sawant, S.
    Schadmand, S.
    Sefzick, T.
    Serdyuk, V.
    Shwartz, B.
    Siudak, R.
    Skorodko, T.
    Skurzok, M.
    Smyrski, J.
    Sopov, V.
    Stassen, R.
    Stepaniak, J.
    Stephan, E.
    Sterzenbach, G.
    Stockhorst, H.
    Stroeher, H.
    Szczurek, A.
    Taeschner, A.
    Trzcinski, A.
    Varma, R.
    Wolke, Magnus
    Uppsala University, Disciplinary Domain of Science and Technology, Physics, Department of Physics and Astronomy, Nuclear Physics.
    Wronska, A.
    Wuestner, P.
    Wurm, P.
    Yamamoto, A.
    Yuan, X.
    Yurev, L.
    Zabierowski, J.
    Zheng, C.
    Zielinski, M. J.
    Zink, A.
    Zlomanczuk, Jozef
    Uppsala University, Disciplinary Domain of Science and Technology, Physics, Department of Physics and Astronomy, Nuclear Physics.
    Zupranski, P.
    Zurek, M.
    Measurement of the eta -> pi(+)pi(-)pi(0) Dalitz plot distribution2014In: Physical Review C. Nuclear Physics, ISSN 0556-2813, E-ISSN 1089-490X, Vol. 90, no 4, p. 045207-Article in journal (Refereed)
    Abstract [en]

    The Dalitz plot distribution of the eta -> pi(+)pi(-)pi(0) decay is determined by using a data sample of 1.2 x 10(7) eta mesons from the pd -> He-3 eta reaction at 1 GeV collected by the WASA detector at COSY.

  • 211.
    Adlarson, Patrik
    et al.
    Uppsala University, Disciplinary Domain of Science and Technology, Physics, Department of Physics and Astronomy, Nuclear Physics. Johannes Gutenberg Univ Mainz, Inst Kernphys, Johann Joachim Becher Weg 45, D-55128 Mainz, Germany..
    Augustyniak, W.
    Natl Ctr Nucl Res, Dept Nucl Phys, Ul Hoza 69, PL-00681 Warsaw, Poland..
    Bardan, W.
    Jagiellonian Univ, Inst Phys, Ul Reymonta 4, PL-30059 Krakow, Poland..
    Bashkanov, M.
    Eberhard Karls Univ Tubingen, Inst Phys, Morgenstelle 14, D-72076 Tubingen, Germany.;Univ Tubingen, Inst Phys, Kepler Ctr Astro & Teilchenphys, Morgenstelle 14, D-72076 Tubingen, Germany.;Univ Edinburgh, Sch Phys & Astron, Edinburgh EH9 3FD, Midlothian, Scotland..
    Bergmann, F. S.
    Westfal Wilhelms Univ Munster, Inst Kernphys, Wilhelm Klemm Str 9, D-48149 Munster, Germany..
    Berlowski, M.
    Natl Ctr Nucl Res, Dept High Energy Phys, Ul Hoza 69, PL-00681 Warsaw, Poland..
    Bhatt, H.
    Indian Inst Technol, Dept Phys, Bombay 400076, Maharashtra, India..
    Bondar, A.
    Budker Inst Nucl Phys SB RAS, 11 Akad Lavrentieva Prospect, Novosibirsk 630090, Russia.;Novosibirsk State Univ, 2 Pirogova St, Novosibirsk 630090, Russia..
    Buescher, M.
    Forschungszentrum Julich, Inst Kernphys, D-52425 Julich, Germany.;Forschungszentrum Julich, Peter Grunberg Inst, Elekt Eigenschaften PGI 6, D-52425 Julich, Germany.;Heinrich Heine Univ Dusseldorf, Inst Laser & Plasmaphys, Univ Str 1, D-40225 Dusseldorf, Germany..
    Calén, Hans
    Uppsala University, Disciplinary Domain of Science and Technology, Physics, Department of Physics and Astronomy, Nuclear Physics.
    Ciepal, I.
    Jagiellonian Univ, Inst Phys, Ul Reymonta 4, PL-30059 Krakow, Poland..
    Clement, H.
    Eberhard Karls Univ Tubingen, Inst Phys, Morgenstelle 14, D-72076 Tubingen, Germany.;Univ Tubingen, Inst Phys, Kepler Ctr Astro & Teilchenphys, Morgenstelle 14, D-72076 Tubingen, Germany..
    Coderre, D.
    Forschungszentrum Julich, Inst Kernphys, D-52425 Julich, Germany.;Ruhr Univ Bochum, Inst Expt Phys 1, Univ Str 150, D-44780 Bochum, Germany.;Univ Bern, Albert Einstein Ctr Fundamental Phys, Sidlerstr 5, CH-3012 Bern, Switzerland..
    Czerwinski, E.
    Jagiellonian Univ, Inst Phys, Ul Reymonta 4, PL-30059 Krakow, Poland..
    Demmich, K.
    Westfal Wilhelms Univ Munster, Inst Kernphys, Wilhelm Klemm Str 9, D-48149 Munster, Germany..
    Engels, R.
    Forschungszentrum Julich, Inst Kernphys, D-52425 Julich, Germany..
    Erven, A.
    Forschungszentrum Julich, Zentralinst Engn Elektron & Anal, D-52425 Julich, Germany..
    Erven, W.
    Forschungszentrum Julich, Zentralinst Engn Elektron & Anal, D-52425 Julich, Germany..
    Eyrich, W.
    Friedrich Alexander Univ Erlangen Nurnberg, Inst Phys, Erwin Rommel Str 1, D-91058 Erlangen, Germany..
    Fedorets, P.
    Forschungszentrum Julich, Inst Kernphys, D-52425 Julich, Germany.;State Sci Ctr Russian Federat, Inst Theoret & Expt Phys, 25 Bolshaya Cheremushkinskaya, Moscow 117218, Russia..
    Foehl, K.
    Justus Liebig Univ Giessen, Inst Phys 2, Heinrich Buff Ring 16, D-35392 Giessen, Germany..
    Fransson, Kjell
    Uppsala University, Disciplinary Domain of Science and Technology, Physics, Department of Physics and Astronomy, Nuclear Physics.
    Goldenbaum, F.
    Forschungszentrum Julich, Inst Kernphys, D-52425 Julich, Germany..
    Goswami, A.
    Forschungszentrum Julich, Inst Kernphys, D-52425 Julich, Germany.;Indian Inst Technol Indore, Dept Phys, Khandwa Rd, Indore 452017, Madhya Pradesh, India..
    Grigoryev, K.
    Forschungszentrum Julich, Inst Kernphys, D-52425 Julich, Germany.;Petersburg Nucl Phys Inst, Div High Energy Phys, 2 Orlova Rosha, Gatchina 188300, Leningrad Distr, Russia.;Rhein Westfal TH Aachen, Phys Inst B 3, Phys Zentrum, D-52056 Aachen, Germany..
    Gullström, Carl-Oskar
    Uppsala University, Disciplinary Domain of Science and Technology, Physics, Department of Physics and Astronomy, Nuclear Physics.
    Heijkenskjöld, Lena
    Uppsala University, Disciplinary Domain of Science and Technology, Physics, Department of Physics and Astronomy, Nuclear Physics.
    Hejny, V.
    Forschungszentrum Julich, Inst Kernphys, D-52425 Julich, Germany..
    Huesken, N.
    Westfal Wilhelms Univ Munster, Inst Kernphys, Wilhelm Klemm Str 9, D-48149 Munster, Germany..
    Jarczyk, L.
    Jagiellonian Univ, Inst Phys, Ul Reymonta 4, PL-30059 Krakow, Poland..
    Johansson, Tord
    Uppsala University, Disciplinary Domain of Science and Technology, Physics, Department of Physics and Astronomy, Nuclear Physics.
    Kamys, B.
    Jagiellonian Univ, Inst Phys, Ul Reymonta 4, PL-30059 Krakow, Poland..
    Kemmerling, G.
    Forschungszentrum Julich, Zentralinst Engn Elektron & Anal, D-52425 Julich, Germany..
    Khan, F. A.
    Forschungszentrum Julich, Inst Kernphys, D-52425 Julich, Germany..
    Khatri, G.
    Jagiellonian Univ, Inst Phys, Ul Reymonta 4, PL-30059 Krakow, Poland..
    Khoukaz, A.
    Westfal Wilhelms Univ Munster, Inst Kernphys, Wilhelm Klemm Str 9, D-48149 Munster, Germany..
    Kirillov, D. A.
    Joint Inst Nucl Phys, Veksler & Baldin Lab High Energiy Phys, 6 Joliot Curie, Dubna 141980, Russia..
    Kistryn, S.
    Jagiellonian Univ, Inst Phys, Ul Reymonta 4, PL-30059 Krakow, Poland..
    Kleines, H.
    Forschungszentrum Julich, Zentralinst Engn Elektron & Anal, D-52425 Julich, Germany..
    Klos, B.
    Univ Silesia, August Chelkowski Inst Phys, Uniwersytecka 4, PL-40007 Katowice, Poland..
    Krzemien, W.
    Jagiellonian Univ, Inst Phys, Ul Reymonta 4, PL-30059 Krakow, Poland..
    Kulessa, P.
    Polish Acad Sci, Henryk Niewodniczanski Inst Nucl Phys, 152 Radzikowskiego St, PL-31342 Krakow, Poland..
    Kupsc, Andrzej
    Uppsala University, Disciplinary Domain of Science and Technology, Physics, Department of Physics and Astronomy, Nuclear Physics. Natl Ctr Nucl Res, Dept High Energy Phys, Ul Hoza 69, PL-00681 Warsaw, Poland..
    Kuzmin, A.
    Budker Inst Nucl Phys SB RAS, 11 Akad Lavrentieva Prospect, Novosibirsk 630090, Russia.;Novosibirsk State Univ, 2 Pirogova St, Novosibirsk 630090, Russia..
    Lalwani, K.
    Indian Inst Technol, Dept Phys, Bombay 400076, Maharashtra, India.;Univ Delhi, Dept Phys & Astrophys, Delhi 110007, India..
    Lersch, D.
    Forschungszentrum Julich, Inst Kernphys, D-52425 Julich, Germany..
    Lorentz, B.
    Forschungszentrum Julich, Inst Kernphys, D-52425 Julich, Germany..
    Magiera, A.
    Jagiellonian Univ, Inst Phys, Ul Reymonta 4, PL-30059 Krakow, Poland..
    Maier, R.
    Forschungszentrum Julich, Inst Kernphys, D-52425 Julich, Germany.;Forschungszentrum Julich, Julich Aachen Res Alliance, JARA FAME, D-52425 Julich, Germany.;Rhein Westfal TH Aachen, D-52056 Aachen, Germany..
    Marcinievski, Pawel
    Uppsala University, Disciplinary Domain of Science and Technology, Physics, Department of Physics and Astronomy, Nuclear Physics.
    Marianski, B.
    Natl Ctr Nucl Res, Dept Nucl Phys, Ul Hoza 69, PL-00681 Warsaw, Poland..
    Mikirtychiants, M.
    Forschungszentrum Julich, Inst Kernphys, D-52425 Julich, Germany.;Ruhr Univ Bochum, Inst Expt Phys 1, Univ Str 150, D-44780 Bochum, Germany.;Petersburg Nucl Phys Inst, Div High Energy Phys, 2 Orlova Rosha, Gatchina 188300, Leningrad Distr, Russia..
    Morsch, H. -P
    Moskal, P.
    Jagiellonian Univ, Inst Phys, Ul Reymonta 4, PL-30059 Krakow, Poland..
    Ohm, H.
    Forschungszentrum Julich, Inst Kernphys, D-52425 Julich, Germany..
    Ozerianska, I.
    Jagiellonian Univ, Inst Phys, Ul Reymonta 4, PL-30059 Krakow, Poland..
    del Rio, E. Perez
    Eberhard Karls Univ Tubingen, Inst Phys, Morgenstelle 14, D-72076 Tubingen, Germany.;Univ Tubingen, Inst Phys, Kepler Ctr Astro & Teilchenphys, Morgenstelle 14, D-72076 Tubingen, Germany.;Ist Nazl Fis Nucl, Lab Nazl Frascati, Via E Fermi 40, I-00044 Rome, Italy..
    Piskunov, N. M.
    Joint Inst Nucl Phys, Veksler & Baldin Lab High Energiy Phys, 6 Joliot Curie, Dubna 141980, Russia..
    Prasuhn, D.
    Forschungszentrum Julich, Inst Kernphys, D-52425 Julich, Germany..
    Pszczel, Damian
    Uppsala University, Disciplinary Domain of Science and Technology, Physics, Department of Physics and Astronomy, Nuclear Physics. Natl Ctr Nucl Res, Dept High Energy Phys, Ul Hoza 69, PL-00681 Warsaw, Poland..
    Pysz, K.
    Polish Acad Sci, Henryk Niewodniczanski Inst Nucl Phys, 152 Radzikowskiego St, PL-31342 Krakow, Poland..
    Pyszniak, Andrzej
    Uppsala University, Disciplinary Domain of Science and Technology, Physics, Department of Physics and Astronomy, Nuclear Physics. Jagiellonian Univ, Inst Phys, Ul Reymonta 4, PL-30059 Krakow, Poland..
    Ritman, J.
    Forschungszentrum Julich, Inst Kernphys, D-52425 Julich, Germany.;Ruhr Univ Bochum, Inst Expt Phys 1, Univ Str 150, D-44780 Bochum, Germany.;Forschungszentrum Julich, Julich Aachen Res Alliance, JARA FAME, D-52425 Julich, Germany.;Rhein Westfal TH Aachen, D-52056 Aachen, Germany..
    Roy, A.
    Indian Inst Technol Indore, Dept Phys, Khandwa Rd, Indore 452017, Madhya Pradesh, India..
    Rudy, Z.
    Jagiellonian Univ, Inst Phys, Ul Reymonta 4, PL-30059 Krakow, Poland..
    Rundel, O.
    Jagiellonian Univ, Inst Phys, Ul Reymonta 4, PL-30059 Krakow, Poland..
    Sawant, S.
    Indian Inst Technol, Dept Phys, Bombay 400076, Maharashtra, India.;Forschungszentrum Julich, Inst Kernphys, D-52425 Julich, Germany..
    Schadmand, S.
    Forschungszentrum Julich, Inst Kernphys, D-52425 Julich, Germany..
    Sefzick, T.
    Forschungszentrum Julich, Inst Kernphys, D-52425 Julich, Germany..
    Serdyuk, V.
    Forschungszentrum Julich, Inst Kernphys, D-52425 Julich, Germany..
    Shwartz, B.
    Budker Inst Nucl Phys SB RAS, 11 Akad Lavrentieva Prospect, Novosibirsk 630090, Russia.;Novosibirsk State Univ, 2 Pirogova St, Novosibirsk 630090, Russia..
    Sitterberg, K.
    Westfal Wilhelms Univ Munster, Inst Kernphys, Wilhelm Klemm Str 9, D-48149 Munster, Germany..
    Siudak, R.
    Polish Acad Sci, Henryk Niewodniczanski Inst Nucl Phys, 152 Radzikowskiego St, PL-31342 Krakow, Poland..
    Skorodko, T.
    Eberhard Karls Univ Tubingen, Inst Phys, Morgenstelle 14, D-72076 Tubingen, Germany.;Univ Tubingen, Inst Phys, Kepler Ctr Astro & Teilchenphys, Morgenstelle 14, D-72076 Tubingen, Germany.;Tomsk State Univ, Dept Phys, 36 Lenina Ave, Tomsk 634050, Russia..
    Skurzok, M.
    Jagiellonian Univ, Inst Phys, Ul Reymonta 4, PL-30059 Krakow, Poland..
    Smyrski, J.
    Jagiellonian Univ, Inst Phys, Ul Reymonta 4, PL-30059 Krakow, Poland..
    Sopov, V.
    State Sci Ctr Russian Federat, Inst Theoret & Expt Phys, 25 Bolshaya Cheremushkinskaya, Moscow 117218, Russia..
    Stassen, R.
    Forschungszentrum Julich, Inst Kernphys, D-52425 Julich, Germany..
    Stepaniak, J.
    Natl Ctr Nucl Res, Dept High Energy Phys, Ul Hoza 69, PL-00681 Warsaw, Poland..
    Stephan, E.
    Univ Silesia, August Chelkowski Inst Phys, Uniwersytecka 4, PL-40007 Katowice, Poland..
    Sterzenbach, G.
    Forschungszentrum Julich, Inst Kernphys, D-52425 Julich, Germany..
    Stockhorst, H.
    Forschungszentrum Julich, Inst Kernphys, D-52425 Julich, Germany..
    Stroeher, H.
    Forschungszentrum Julich, Inst Kernphys, D-52425 Julich, Germany.;Forschungszentrum Julich, Julich Aachen Res Alliance, JARA FAME, D-52425 Julich, Germany.;Rhein Westfal TH Aachen, D-52056 Aachen, Germany..
    Szczurek, A.
    Polish Acad Sci, Henryk Niewodniczanski Inst Nucl Phys, 152 Radzikowskiego St, PL-31342 Krakow, Poland..
    Taeschner, A.
    Westfal Wilhelms Univ Munster, Inst Kernphys, Wilhelm Klemm Str 9, D-48149 Munster, Germany..
    Trzcinski, A.
    Natl Ctr Nucl Res, Dept Nucl Phys, Ul Hoza 69, PL-00681 Warsaw, Poland..
    Varma, R.
    Indian Inst Technol, Dept Phys, Bombay 400076, Maharashtra, India..
    Wiedner, U.
    Ruhr Univ Bochum, Inst Expt Phys 1, Univ Str 150, D-44780 Bochum, Germany..
    Wolke, Magnus
    Uppsala University, Disciplinary Domain of Science and Technology, Physics, Department of Physics and Astronomy, Nuclear Physics.
    Wronska, A.
    Jagiellonian Univ, Inst Phys, Ul Reymonta 4, PL-30059 Krakow, Poland..
    Wuestner, P.
    Forschungszentrum Julich, Zentralinst Engn Elektron & Anal, D-52425 Julich, Germany..
    Wurm, P.
    Forschungszentrum Julich, Inst Kernphys, D-52425 Julich, Germany..
    Yamamoto, A.
    High Energy Accelerator Res Org KEK, Tsukuba, Ibaraki 3050801, Japan..
    Zabierowski, J.
    Natl Ctr Nucl Res, Dept Astrophys, Ul Box 447, PL-90950 Lodz, Poland..
    Zielinski, M. J.
    Jagiellonian Univ, Inst Phys, Ul Reymonta 4, PL-30059 Krakow, Poland..
    Zink, A.
    Friedrich Alexander Univ Erlangen Nurnberg, Inst Phys, Erwin Rommel Str 1, D-91058 Erlangen, Germany..
    Zlomanczuk, Jozef
    Uppsala University, Disciplinary Domain of Science and Technology, Physics, Department of Physics and Astronomy, Nuclear Physics.
    Zupranski, P.
    Natl Ctr Nucl Res, Dept Nucl Phys, Ul Hoza 69, PL-00681 Warsaw, Poland..
    Zurek, M.
    Forschungszentrum Julich, Inst Kernphys, D-52425 Julich, Germany..
    Measurements of branching ratios for eta decays into charged particles2016In: PHYSICAL REVIEW C, ISSN 2469-9985, Vol. 94, no 6, article id 065206Article in journal (Refereed)
    Abstract [en]

    The WASA-at-COSY experiment has collected 3 x 10(7) events with eta mesons produced via the reaction pd -> He-3 eta at T = 1.0 GeV. Using this data set, we evaluate the branching ratios of the decays eta -> pi(+)pi(-)gamma, eta -> e(+)e(-)gamma, eta -> pi(+)pi(-)e(+)e(-), and eta -> e(+)e(-)e(+)e(-). The branching ratios are normalized to the eta -> pi(+)pi(-) pi(0) decay. In addition an upper limit on a CP-violating asymmetry in eta -> pi(+)pi(-)e(+)e(-) is extracted.

  • 212.
    Adlarson, Patrik
    et al.
    Uppsala University, Disciplinary Domain of Science and Technology, Physics, Department of Physics and Astronomy, Nuclear Physics. Eberhard Karls Univ Tubingen, Phys Inst, Morgenstelle 14, D-72076 Tubingen, Germany.;Johannes Gutenberg Univ Mainz, Inst Kemphys, Johann Joachim Becher Weg 45, D-55128 Mainz, Germany..
    Augustyniak, W.
    Natl Ctr Nucl Res, Dept Nucl Phys, ul Hoza 69, PL-00681 Warsaw, Poland..
    Bardan, W.
    Jagiellonian Univ, Inst Phys, Prof Stanislawa Lojasiewicza 11, PL-30348 Krakow, Poland..
    Bashkanov, M.
    Univ Edinburgh, Sch Phys & Astron, James Clerk Maxwell Bldg,Peter Guthrie Tait Rd, Edinburgh EH9 3FD, Midlothian, Scotland..
    Bergmann, F. S.
    WilhelmsUniv Miinster, Inst Kernphys, Wilhelm Klemm Str 9, D-48149 Munster, Germany..
    Berlowski, M.
    Natl Ctr Nucl Res, Dept High Energy Phys, ul Hoza 69, PL-00681 Warsaw, Poland..
    Bhatt, H.
    Indian Inst Technol, Dept Phys, Mumbai 400076, Maharashtra, India..
    Bondar, A.
    Budker Inst Nucl Phys SB RAS, 11 akademika Lavrentieva prospect, Novosibirsk 630090, Russia.;Eberhard Karls Univ Tubingen, Phys Inst, Morgenstelle 14, D-72076 Tubingen, Germany.;Johannes Gutenberg Univ Mainz, Inst Kemphys, Johann Joachim Becher Weg 45, D-55128 Mainz, Germany..
    Buescher, M.
    Forschungszentrum Julich, Peter Grunberg Inst, PGI 6 Elekt Eigenschaften, D-52425 Julich, Germany.;Heinrich Heine Univ Dusseldorf, Inst Laser & Plasmaphys, Univ 1, D-40225 Dusseldorf, Germany..
    Calén, Hans
    Uppsala University, Disciplinary Domain of Science and Technology, Physics, Department of Physics and Astronomy, Nuclear Physics.
    Ciepal, I.
    Polish Acad Sci, Henryk Niewodniczariski Inst Nucl Phys, 52 Radzikowskiego St, PL-31342 Krakow, Poland..
    Clement, H.
    Eberhard Karls Univ Tubingen, Phys Inst, Morgenstelle 14, D-72076 Tubingen, Germany.;Phys Inst Univ Tubingen, Kepler Ctr Astro & Teilchenphys, Morgenstelle 14, D-72076 Tubingen, Germany..
    Czerwinski, E.
    Jagiellonian Univ, Inst Phys, Prof Stanislawa Lojasiewicza 11, PL-30348 Krakow, Poland..
    Demmich, K.
    WilhelmsUniv Miinster, Inst Kernphys, Wilhelm Klemm Str 9, D-48149 Munster, Germany..
    Engels, R.
    Forschungszentrum Julich, Inst Kernphys, D-52425 Ankh, Germany..
    Erven, A.
    Forschungszentrum Julich, Zentralinst Engn Elekt & Analyt, D-52425 Julich, Germany..
    Erven, W.
    Forschungszentrum Julich, Zentralinst Engn Elekt & Analyt, D-52425 Julich, Germany..
    Eyrich, W.
    Friedrich Alexander Univ Erlangen Nurnberg, Phys Inst, Erwin Rommel Str 1, D-91058 Erlangen, Germany..
    Fedorets, P.
    Forschungszentrum Julich, Inst Kernphys, D-52425 Ankh, Germany.;Russian Federat, Inst Theoret & Expt Phys, State Sci Ctr, 25 Bolshaya Cheremushkinskaya, Moscow 117218, Russia..
    Foehl, K.
    Justus Liebig Univ Giessen, Physikal Inst 2, Heinrich Buff Ring 16, D-35392 Giessen, Germany..
    Fransson, Kjell
    Uppsala University, Disciplinary Domain of Science and Technology, Physics, Department of Physics and Astronomy, Nuclear Physics.
    Goldenbaum, E.
    Forschungszentrum Julich, Inst Kernphys, D-52425 Ankh, Germany..
    Goswami, A.
    Forschungszentrum Julich, Inst Kernphys, D-52425 Ankh, Germany.;Indian Inst Technol Indore, Dept Phys, Khandwa Rd, Indore 452017, Madhya Pradesh, India..
    Grigoryev, K.
    Forschungszentrum Julich, Inst Kernphys, D-52425 Ankh, Germany.;Petersburg Nucl Phys Inst, Div High Energy Phys, 2 Orlova Rosha, Gatchina 188300, Russia.;Rhein Westfal TH Aachen, Physikal Inst B Physikzentrum 3, D-52056 Aachen, Germany..
    Gullstroem, C. -O
    Heijkenskjöld, Lena
    Uppsala University, Disciplinary Domain of Science and Technology, Physics, Department of Physics and Astronomy, Nuclear Physics.
    Hejny, V.
    Forschungszentrum Julich, Inst Kernphys, D-52425 Ankh, Germany..
    Huesken, N.
    WilhelmsUniv Miinster, Inst Kernphys, Wilhelm Klemm Str 9, D-48149 Munster, Germany..
    Jarczyk, L.
    Jagiellonian Univ, Inst Phys, Prof Stanislawa Lojasiewicza 11, PL-30348 Krakow, Poland..
    Johansson, Tord
    Uppsala University, Disciplinary Domain of Science and Technology, Physics, Department of Physics and Astronomy, Nuclear Physics.
    Kamys, B.
    Jagiellonian Univ, Inst Phys, Prof Stanislawa Lojasiewicza 11, PL-30348 Krakow, Poland..
    Kelkar, N. G.
    Jagiellonian Univ, Inst Phys, Prof Stanislawa Lojasiewicza 11, PL-30348 Krakow, Poland.;Univ Los Andes, Dept Fis, Cra.IE,18A-10, Bogota, Colombia..
    Kemmerling, G.
    Forschungszentrum Julich, Zentralinst Engn Elekt & Analyt, D-52425 Julich, Germany.;Forschungszentrum Julich, JCNS, D-52425 Julich, Germany..
    Khatri, G.
    Jagiellonian Univ, Inst Phys, Prof Stanislawa Lojasiewicza 11, PL-30348 Krakow, Poland.;Harvard Univ, Dept Phys, 17 Oxford St, Cambridge, MA 02138 USA..
    Khoukaz, A.
    WilhelmsUniv Miinster, Inst Kernphys, Wilhelm Klemm Str 9, D-48149 Munster, Germany..
    Khreptak, O.
    Jagiellonian Univ, Inst Phys, Prof Stanislawa Lojasiewicza 11, PL-30348 Krakow, Poland..
    Kirillov, D. A.
    Kistryn, S.
    Jagiellonian Univ, Inst Phys, Prof Stanislawa Lojasiewicza 11, PL-30348 Krakow, Poland..
    Kleines, H.
    Eberhard Karls Univ Tubingen, Phys Inst, Morgenstelle 14, D-72076 Tubingen, Germany.;Forschungszentrum Julich, Zentralinst Engn Elekt & Analyt, D-52425 Julich, Germany..
    Klos, B.
    Univ Silesia, August Chelkowski Inst Phys, Uniwersytecka 4, PL-40007 Katowice, Poland..
    Krzemien, W.
    Natl Ctr Nucl Res, Dept High Energy Phys, ul Hoza 69, PL-00681 Warsaw, Poland..
    Kulessa, P.
    Polish Acad Sci, Henryk Niewodniczariski Inst Nucl Phys, 52 Radzikowskiego St, PL-31342 Krakow, Poland..
    Kupsc, Andrzej
    Uppsala University, Disciplinary Domain of Science and Technology, Physics, Department of Physics and Astronomy, Nuclear Physics. Natl Ctr Nucl Res, Dept High Energy Phys, ul Hoza 69, PL-00681 Warsaw, Poland..
    Kuzmin, A.
    Budker Inst Nucl Phys SB RAS, 11 akademika Lavrentieva prospect, Novosibirsk 630090, Russia.;Novosibirsk State Univ, 2 Pirogova Str, Novosibirsk 630090, Russia..
    Lalwani, K.
    Malaviya Natl Inst Technol, Dept Phys, Jaipur 302017, Rajasthan, India..
    Lersch, D.
    Forschungszentrum Julich, Inst Kernphys, D-52425 Ankh, Germany..
    Lorentz, B.
    Forschungszentrum Julich, Inst Kernphys, D-52425 Ankh, Germany..
    Magierae, A.
    Jagiellonian Univ, Inst Phys, Prof Stanislawa Lojasiewicza 11, PL-30348 Krakow, Poland..
    Maier, R.
    Forschungszentrum Julich, Inst Kernphys, D-52425 Ankh, Germany.;Forschungszentrum Julich, JARA FAME, D-52425 Julich, Germany.;Rhein Westfal TH Aachen, D-52056 Aachen, Germany..
    Marcinievski, Pawel
    Uppsala University, Disciplinary Domain of Science and Technology, Physics, Department of Physics and Astronomy, Nuclear Physics.
    Marianski, B.
    Natl Ctr Nucl Res, Dept Nucl Phys, ul Hoza 69, PL-00681 Warsaw, Poland..
    Morsch, H. -P
    Moskal, P.
    Jagiellonian Univ, Inst Phys, Prof Stanislawa Lojasiewicza 11, PL-30348 Krakow, Poland..
    Ohm, H.
    Forschungszentrum Julich, Inst Kernphys, D-52425 Ankh, Germany..
    del Rio, E. Perez
    Eberhard Karls Univ Tubingen, Phys Inst, Morgenstelle 14, D-72076 Tubingen, Germany.;Phys Inst Univ Tubingen, Kepler Ctr Astro & Teilchenphys, Morgenstelle 14, D-72076 Tubingen, Germany.;INFN, Lab Nazl Frascati, Via Fermi,40, I-00044 Rome, Italy..
    Piskunov, N. M.
    Joint Inst Nucl Phys, Veksler & Baldin Lab High Energy Phys, 6 Joliot Curie, Dubna 141980, Russia..
    Prasuhn, D.
    Forschungszentrum Julich, Inst Kernphys, D-52425 Ankh, Germany..
    Pszczel, Damian
    Uppsala University, Disciplinary Domain of Science and Technology, Physics, Department of Physics and Astronomy, Nuclear Physics. Natl Ctr Nucl Res, Dept High Energy Phys, ul Hoza 69, PL-00681 Warsaw, Poland..
    Pysz, K.
    Polish Acad Sci, Henryk Niewodniczariski Inst Nucl Phys, 52 Radzikowskiego St, PL-31342 Krakow, Poland..
    Pyszniak, Andrzej
    Uppsala University, Disciplinary Domain of Science and Technology, Physics, Department of Physics and Astronomy, Nuclear Physics. Jagiellonian Univ, Inst Phys, Prof Stanislawa Lojasiewicza 11, PL-30348 Krakow, Poland..
    Ritman, J.
    Forschungszentrum Julich, Inst Kernphys, D-52425 Ankh, Germany.;Forschungszentrum Julich, JARA FAME, D-52425 Julich, Germany.;Rhein Westfal TH Aachen, D-52056 Aachen, Germany.;Ruhr Univ Bochum, Inst Experimentalphys 1, Univ 150, D-44780 Bochum, Germany..
    Roy, A.
    Indian Inst Technol Indore, Dept Phys, Khandwa Rd, Indore 452017, Madhya Pradesh, India..
    Rudy, Z.
    Jagiellonian Univ, Inst Phys, Prof Stanislawa Lojasiewicza 11, PL-30348 Krakow, Poland..
    Rundel, O.
    Jagiellonian Univ, Inst Phys, Prof Stanislawa Lojasiewicza 11, PL-30348 Krakow, Poland..
    Sawant, S.
    Indian Inst Technol, Dept Phys, Mumbai 400076, Maharashtra, India..
    Schadmand, S.
    Forschungszentrum Julich, Inst Kernphys, D-52425 Ankh, Germany..
    Schaetti-Ozerianska, I.
    Jagiellonian Univ, Inst Phys, Prof Stanislawa Lojasiewicza 11, PL-30348 Krakow, Poland..
    Sefzick, T.
    Forschungszentrum Julich, Inst Kernphys, D-52425 Ankh, Germany..
    Serdyuk, V.
    Forschungszentrum Julich, Inst Kernphys, D-52425 Ankh, Germany..
    Shwartz, B.
    Budker Inst Nucl Phys SB RAS, 11 akademika Lavrentieva prospect, Novosibirsk 630090, Russia.;Novosibirsk State Univ, 2 Pirogova Str, Novosibirsk 630090, Russia..
    Sitterberg, K.
    WilhelmsUniv Miinster, Inst Kernphys, Wilhelm Klemm Str 9, D-48149 Munster, Germany..
    Skorodko, T.
    Phys Inst Univ Tubingen, Kepler Ctr Astro & Teilchenphys, Morgenstelle 14, D-72076 Tubingen, Germany.;Tomsk State Univ, Dept Phys, 36 Lenina Ave, Tomsk 634050, Russia.;Johannes Gutenberg Univ Mainz, Inst Kemphys, Johann Joachim Becher Weg 45, D-55128 Mainz, Germany..
    Skurzok, M.
    Jagiellonian Univ, Inst Phys, Prof Stanislawa Lojasiewicza 11, PL-30348 Krakow, Poland..
    Smyrski, J.
    Jagiellonian Univ, Inst Phys, Prof Stanislawa Lojasiewicza 11, PL-30348 Krakow, Poland..
    Sopov, V.
    Russian Federat, Inst Theoret & Expt Phys, State Sci Ctr, 25 Bolshaya Cheremushkinskaya, Moscow 117218, Russia..
    Stassen, R.
    Forschungszentrum Julich, Inst Kernphys, D-52425 Ankh, Germany..
    Stepaniak, J.
    Natl Ctr Nucl Res, Dept High Energy Phys, ul Hoza 69, PL-00681 Warsaw, Poland..
    Stephan, E.
    Sterzenbach, G.
    Forschungszentrum Julich, Inst Kernphys, D-52425 Ankh, Germany..
    Stockhorst, H.
    Forschungszentrum Julich, Inst Kernphys, D-52425 Ankh, Germany..
    Stroeher, H.
    Forschungszentrum Julich, Inst Kernphys, D-52425 Ankh, Germany.;Forschungszentrum Julich, JARA FAME, D-52425 Julich, Germany.;Rhein Westfal TH Aachen, D-52056 Aachen, Germany..
    Szczurek, A.
    Trzcinski, A.
    Natl Ctr Nucl Res, Dept Nucl Phys, ul Hoza 69, PL-00681 Warsaw, Poland..
    Varma, R.
    Indian Inst Technol, Dept Phys, Mumbai 400076, Maharashtra, India..
    Wolke, M.
    Wronska, A.
    Jagiellonian Univ, Inst Phys, Prof Stanislawa Lojasiewicza 11, PL-30348 Krakow, Poland..
    Wuestner, P.
    Forschungszentrum Julich, Zentralinst Engn Elekt & Analyt, D-52425 Julich, Germany..
    Yamamoto, A.
    High Energy Accelerator Res Org KEK, Tsukuba, Ibaraki 3050801, Japan..
    Zabierowski, J.
    Natl Ctr Nucl Res, Dept Astrophys, Box 447, PL-90950 Lodi, Poland..
    Zielinski, M. J.
    Jagiellonian Univ, Inst Phys, Prof Stanislawa Lojasiewicza 11, PL-30348 Krakow, Poland..
    Zlomanczuk, Jozef
    Uppsala University, Disciplinary Domain of Science and Technology, Physics, Department of Physics and Astronomy, Nuclear Physics.
    Zupranski, P.
    Natl Ctr Nucl Res, Dept Nucl Phys, ul Hoza 69, PL-00681 Warsaw, Poland..
    Zurek, M.
    Forschungszentrum Julich, Inst Kernphys, D-52425 Ankh, Germany..
    Search for eta-mesic He-4 in the dd -> (3)Hen pi(0) and dd -> (3)Hep pi(-) reactions with the WASA-at-COSY facility2017In: Nuclear Physics A, ISSN 0375-9474, E-ISSN 1873-1554, Vol. 959, p. 102-115Article in journal (Refereed)
    Abstract [en]

    The search for He-4-eta bound states was performed with the WASA-at-COSY facility via the measurement of the excitation function for the dd -> (3)Hen pi(0) and dd -> (3)Hep pi(-) processes. The deuteron beam momentum was varied continuously between 2.127 GeV/c and 2.422 GeV/c, corresponding to the excess energy for the dd -> He-4 eta reaction ranging from Q = 70 MeV to Q = 30 MeV. The luminosity was determined based on the dd -> (3)Hen reaction and the quasi-free proton proton scattering via dd -> ppn(spectator)n(spectator) reactions. The excitation functions, determined independently for the measured reactions, do not reveal a structure which could be interpreted as a narrow mesic nucleus. Therefore, the upper limits of the total cross sections for the bound state production and decay in dd -> (4He-eta)(bound) -> (3)Hen pi(0) and dd -> (He-4-eta)(bound) -> (3)Hep pi(-) processes were determined taking into account the isospin relation between the both of the considered channels. The results of the analysis depend on the assumptions of the N* (1535) momentum distribution in the anticipated mesic-He-4. Assuming, as in the previous works, that this is identical with the distribution of nucleons bound with 20 MeV in He-4, we determined that (for the mesic bound state width in the range from 5 MeV to 50 MeV) the upper limits at 90% confidence level are about 3 nb and about 6 nb for n pi(0) and p pi(-) channels, respectively. However, based on the recent theoretical findings of the N*(1535) momentum distribution in the N*-He-3 nucleus bound by 3.6 MeV, we find that the WASA-at-COSY detector acceptance decreases and hence the corresponding upper limits are 5 nb and 10 nb for n pi(0) and p pi(-) channels respectively. (C) 2017 Elsevier B.V. All rights reserved.

  • 213.
    Adlarson, Patrik
    et al.
    Uppsala University, Disciplinary Domain of Science and Technology, Physics, Department of Physics and Astronomy, Nuclear Physics. Johannes Gutenberg Univ Mainz, Inst Kernphys, Johann Joachim Becher Weg 45, D-55128 Mainz, Germany..
    Augustyniak, W.
    Natl Ctr Nucl Res, Dept Nucl Phys, Ul Hoza 69, PL-00681 Warsaw, Poland..
    Bardan, W.
    Jagiellonian Univ, Inst Phys, Prof Stanislawa Lojasiewicza 11, PL-30348 Krakow, Poland..
    Bashkanov, M.
    Univ Edinburgh, Sch Phys & Astron, James Clerk Maxwell Bldg,Peter Guthrie Tait Rd, Edinburgh EH9 3FD, Midlothian, Scotland..
    Bergmann, F. S.
    Westfal Wilhelms Univ Munster, Inst Kernphys, Wilhelm Klemm Str 9, D-48149 Munster, Germany..
    Berlowski, M.
    Natl Ctr Nucl Res, High Energy Phys Dept, Ul Hoza 69, PL-00681 Warsaw, Poland..
    Bhatt, H.
    Indian Inst Technol, Dept Phys, Bombay 400076, Maharashtra, India..
    Bondar, A.
    SB RAS, Budker Inst Nucl Phys, 11 Akad Lavrentieva Prospect, Novosibirsk 630090, Russia.;Novosibirsk State Univ, 2 Pirogova Str, Novosibirsk 630090, Russia..
    Buescher, M.
    Forschungszentrum Julich, Inst Kernphys, D-52425 Julich, Germany.;Forschungszentrum Julich, Peter Grunberg Inst, PGI Elekt Eigenschaften 6, D-52425 Julich, Germany.;Heinrich Heine Univ Dusseldorf, Inst Laser & Plasmaphys, Univ Str 1, D-40225 Dusseldorf, Germany..
    Calén, Hans
    Uppsala University, Disciplinary Domain of Science and Technology, Physics, Department of Physics and Astronomy, Nuclear Physics.
    Ciepal, I.
    Polish Acad Sci, Henryk Niewodniczanski Inst Nucl Phys, 152 Radzikowskiego St, PL-31342 Krakow, Poland..
    Clement, H.
    Eberhard Karls Univ Tubingen, Phys Inst, Morgenstelle 14, D-72076 Tubingen, Germany.;Eberhard Karls Univ Tubingen, Kepler Ctr Astro & Particle Phys, Morgenstelle 14, D-72076 Tubingen, Germany..
    Czerwinski, E.
    Jagiellonian Univ, Inst Phys, Prof Stanislawa Lojasiewicza 11, PL-30348 Krakow, Poland..
    Demmich, K.
    Westfal Wilhelms Univ Munster, Inst Kernphys, Wilhelm Klemm Str 9, D-48149 Munster, Germany..
    Engels, R.
    Forschungszentrum Julich, Inst Kernphys, D-52425 Julich, Germany..
    Erven, A.
    Forschungszentrum Julich, Zent Inst Engn Elekt & Analyt, D-52425 Julich, Germany..
    Erven, W.
    Forschungszentrum Julich, Zent Inst Engn Elekt & Analyt, D-52425 Julich, Germany..
    Eyrich, W.
    Friedrich Alexander Univ Erlangen Nurnberg, Phys Inst, Erwin Rommel Str 1, D-91058 Erlangen, Germany..
    Fedorets, P.
    Forschungszentrum Julich, Inst Kernphys, D-52425 Julich, Germany.;State Sci Ctr Russian Federat, Inst Theoret & Expt Phys, Bolshaya Cheremushkinskaya 25, Moscow 117218, Russia..
    Foehl, K.
    Justus Liebig Univ Giessen, Phys Inst 2, Heinrich Buff Ring 16, D-35392 Giessen, Germany..
    Fransson, Kjell
    Uppsala University, Disciplinary Domain of Science and Technology, Physics, Department of Physics and Astronomy, Nuclear Physics.
    Goldenbaum, F.
    Forschungszentrum Julich, Inst Kernphys, D-52425 Julich, Germany..
    Goswami, A.
    Forschungszentrum Julich, Inst Kernphys, D-52425 Julich, Germany.;Indian Inst Technol Indore, Dept Phys, Khandwa Rd, Indore 452017, Madhya Pradesh, India..
    Grigoryev, K.
    Forschungszentrum Julich, Inst Kernphys, D-52425 Julich, Germany.;Petersburg Nucl Phys Inst, High Energy Phys Div, Orlova Rosha 2, Gatchina 188300, Leningrad Distr, Russia.;Rhein Westfal TH Aachen, Phys Inst B 3, Phys Zentrum, D-52056 Aachen, Germany..
    Gullström, Carl-Oscar
    Uppsala University, Disciplinary Domain of Science and Technology, Physics, Department of Physics and Astronomy, Nuclear Physics.
    Heijkenskjöld, Lena
    Uppsala University, Disciplinary Domain of Science and Technology, Physics, Department of Physics and Astronomy, Nuclear Physics.
    Hejny, V.
    Forschungszentrum Julich, Inst Kernphys, D-52425 Julich, Germany..
    Huesken, N.
    Westfal Wilhelms Univ Munster, Inst Kernphys, Wilhelm Klemm Str 9, D-48149 Munster, Germany..
    Jarczyk, L.
    Jagiellonian Univ, Inst Phys, Prof Stanislawa Lojasiewicza 11, PL-30348 Krakow, Poland..
    Johansson, Tord
    Uppsala University, Disciplinary Domain of Science and Technology, Physics, Department of Physics and Astronomy, Nuclear Physics.
    Kamys, B.
    Jagiellonian Univ, Inst Phys, Prof Stanislawa Lojasiewicza 11, PL-30348 Krakow, Poland..
    Kemmerling, G.
    Forschungszentrum Julich, Zent Inst Engn Elekt & Analyt, D-52425 Julich, Germany.;Forschungszentrum Julich, Julich Ctr Neutron Sci JCNS, D-52425 Julich, Germany..
    Khan, F. A.
    Forschungszentrum Julich, Inst Kernphys, D-52425 Julich, Germany..
    Khatri, G.
    Jagiellonian Univ, Inst Phys, Prof Stanislawa Lojasiewicza 11, PL-30348 Krakow, Poland.;Harvard Univ, Dept Phys, 17 Oxford St, Cambridge, MA 02138 USA..
    Khoukaz, A.
    Westfal Wilhelms Univ Munster, Inst Kernphys, Wilhelm Klemm Str 9, D-48149 Munster, Germany..
    Khreptak, O.
    Jagiellonian Univ, Inst Phys, Prof Stanislawa Lojasiewicza 11, PL-30348 Krakow, Poland..
    Kirillov, D. A.
    Joint Inst Nucl Phys, Veksler & Baldin Lab High Energiy Phys, Joliot Curie 6, Dubna 141980, Moscow Region, Russia..
    Kistryn, S.
    Jagiellonian Univ, Inst Phys, Prof Stanislawa Lojasiewicza 11, PL-30348 Krakow, Poland..
    Kleines, H.
    Forschungszentrum Julich, Zent Inst Engn Elekt & Analyt, D-52425 Julich, Germany.;Forschungszentrum Julich, Julich Ctr Neutron Sci JCNS, D-52425 Julich, Germany..
    Klos, B.
    Univ Silesia, August Chelkowski Inst Phys, Uniwersytecka 4, PL-40007 Katowice, Poland..
    Krzemien, W.
    Natl Ctr Nucl Res, High Energy Phys Dept, Ul Hoza 69, PL-00681 Warsaw, Poland..
    Kulessa, P.
    Polish Acad Sci, Henryk Niewodniczanski Inst Nucl Phys, 152 Radzikowskiego St, PL-31342 Krakow, Poland..
    Kupsc, Andrzej
    Uppsala University, Disciplinary Domain of Science and Technology, Physics, Department of Physics and Astronomy, Nuclear Physics. Natl Ctr Nucl Res, High Energy Phys Dept, Ul Hoza 69, PL-00681 Warsaw, Poland..
    Kuzmin, A.
    SB RAS, Budker Inst Nucl Phys, 11 Akad Lavrentieva Prospect, Novosibirsk 630090, Russia.;Novosibirsk State Univ, 2 Pirogova Str, Novosibirsk 630090, Russia..
    Lalwani, K.
    Malaviya Natl Inst Technol Jaipur, Dept Phys, Jaipur 302017, Rajasthan, India..
    Lersch, D.
    Forschungszentrum Julich, Inst Kernphys, D-52425 Julich, Germany..
    Lorentz, B.
    Forschungszentrum Julich, Inst Kernphys, D-52425 Julich, Germany..
    Magiera, A.
    Jagiellonian Univ, Inst Phys, Prof Stanislawa Lojasiewicza 11, PL-30348 Krakow, Poland..
    Maier, R.
    Forschungszentrum Julich, Inst Kernphys, D-52425 Julich, Germany.;Forschungszentrum Julich, Julich Aachen Res Alliance, JARA FAME, D-52425 Julich, Germany.;Rhein Westfal TH Aachen, D-52056 Aachen, Germany..
    Marcinievski, Pawel
    Uppsala University, Disciplinary Domain of Science and Technology, Physics, Department of Physics and Astronomy, Nuclear Physics.
    Marianski, B.
    Natl Ctr Nucl Res, Dept Nucl Phys, Ul Hoza 69, PL-00681 Warsaw, Poland..
    Morsch, H. -P
    Moskal, P.
    Jagiellonian Univ, Inst Phys, Prof Stanislawa Lojasiewicza 11, PL-30348 Krakow, Poland..
    Ohm, H.
    Forschungszentrum Julich, Inst Kernphys, D-52425 Julich, Germany..
    del Rio, E. Perez
    Eberhard Karls Univ Tubingen, Phys Inst, Morgenstelle 14, D-72076 Tubingen, Germany.;Eberhard Karls Univ Tubingen, Kepler Ctr Astro & Particle Phys, Morgenstelle 14, D-72076 Tubingen, Germany.;INFN, Lab Nazl Frascati, Via E Fermi 40, I-00044 Rome, Italy..
    Piskunov, N. M.
    Joint Inst Nucl Phys, Veksler & Baldin Lab High Energiy Phys, Joliot Curie 6, Dubna 141980, Moscow Region, Russia..
    Prasuhn, D.
    Forschungszentrum Julich, Inst Kernphys, D-52425 Julich, Germany..
    Pszczel, D.
    Uppsala Univ, Dept Phys & Astron, Div Nucl Phys, Box 516, S-75120 Uppsala, Sweden.;Natl Ctr Nucl Res, High Energy Phys Dept, Ul Hoza 69, PL-00681 Warsaw, Poland..
    Pysz, K.
    Polish Acad Sci, Henryk Niewodniczanski Inst Nucl Phys, 152 Radzikowskiego St, PL-31342 Krakow, Poland..
    Pyszniak, Andrzej
    Uppsala University, Disciplinary Domain of Science and Technology, Physics, Department of Physics and Astronomy, Nuclear Physics. Jagiellonian Univ, Inst Phys, Prof Stanislawa Lojasiewicza 11, PL-30348 Krakow, Poland..
    Ritman, J.
    Forschungszentrum Julich, Inst Kernphys, D-52425 Julich, Germany.;Forschungszentrum Julich, Julich Aachen Res Alliance, JARA FAME, D-52425 Julich, Germany.;Rhein Westfal TH Aachen, D-52056 Aachen, Germany.;Ruhr Univ Bochum, Inst Expt Phys 1, Univ Str 150, D-44780 Bochum, Germany..
    Roy, A.
    Indian Inst Technol Indore, Dept Phys, Khandwa Rd, Indore 452017, Madhya Pradesh, India..
    Rudy, Z.
    Jagiellonian Univ, Inst Phys, Prof Stanislawa Lojasiewicza 11, PL-30348 Krakow, Poland..
    Rundel, O.
    Jagiellonian Univ, Inst Phys, Prof Stanislawa Lojasiewicza 11, PL-30348 Krakow, Poland..
    Sawant, S.
    Indian Inst Technol, Dept Phys, Bombay 400076, Maharashtra, India.;Forschungszentrum Julich, Inst Kernphys, D-52425 Julich, Germany..
    Schadmand, S.
    Forschungszentrum Julich, Inst Kernphys, D-52425 Julich, Germany..
    Schatti-Ozerianska, I.
    Jagiellonian Univ, Inst Phys, Prof Stanislawa Lojasiewicza 11, PL-30348 Krakow, Poland..
    Sefzick, T.
    Forschungszentrum Julich, Inst Kernphys, D-52425 Julich, Germany..
    Serdyuk, V.
    Forschungszentrum Julich, Inst Kernphys, D-52425 Julich, Germany..
    Shwartz, B.
    SB RAS, Budker Inst Nucl Phys, 11 Akad Lavrentieva Prospect, Novosibirsk 630090, Russia.;Novosibirsk State Univ, 2 Pirogova Str, Novosibirsk 630090, Russia..
    Sitterberg, K.
    Westfal Wilhelms Univ Munster, Inst Kernphys, Wilhelm Klemm Str 9, D-48149 Munster, Germany..
    Skorodko, T.
    Eberhard Karls Univ Tubingen, Phys Inst, Morgenstelle 14, D-72076 Tubingen, Germany.;Eberhard Karls Univ Tubingen, Kepler Ctr Astro & Particle Phys, Morgenstelle 14, D-72076 Tubingen, Germany.;Tomsk State Univ, Dept Phys, 36 Lenina Ave, Tomsk 634050, Russia..
    Skurzok, M.
    Jagiellonian Univ, Inst Phys, Prof Stanislawa Lojasiewicza 11, PL-30348 Krakow, Poland..
    Smyrski, J.
    Jagiellonian Univ, Inst Phys, Prof Stanislawa Lojasiewicza 11, PL-30348 Krakow, Poland..
    Sopov, V.
    State Sci Ctr Russian Federat, Inst Theoret & Expt Phys, Bolshaya Cheremushkinskaya 25, Moscow 117218, Russia..
    Stassen, R.
    Forschungszentrum Julich, Inst Kernphys, D-52425 Julich, Germany..
    Stepaniak, J.
    Natl Ctr Nucl Res, High Energy Phys Dept, Ul Hoza 69, PL-00681 Warsaw, Poland..
    Stephan, E.
    Univ Silesia, August Chelkowski Inst Phys, Uniwersytecka 4, PL-40007 Katowice, Poland..
    Sterzenbach, G.
    Forschungszentrum Julich, Inst Kernphys, D-52425 Julich, Germany..
    Stockhorst, H.
    Forschungszentrum Julich, Inst Kernphys, D-52425 Julich, Germany..
    Stroeher, H.
    Forschungszentrum Julich, Inst Kernphys, D-52425 Julich, Germany.;Forschungszentrum Julich, Julich Aachen Res Alliance, JARA FAME, D-52425 Julich, Germany.;Rhein Westfal TH Aachen, D-52056 Aachen, Germany..
    Szczurek, A.
    Polish Acad Sci, Henryk Niewodniczanski Inst Nucl Phys, 152 Radzikowskiego St, PL-31342 Krakow, Poland..
    Trzcinski, A.
    Natl Ctr Nucl Res, Dept Nucl Phys, Ul Hoza 69, PL-00681 Warsaw, Poland..
    Varma, R.
    Indian Inst Technol, Dept Phys, Bombay 400076, Maharashtra, India..
    Wolke, Magnus
    Uppsala University, Disciplinary Domain of Science and Technology, Physics, Department of Physics and Astronomy, Nuclear Physics.
    Wronska, A.
    Jagiellonian Univ, Inst Phys, Prof Stanislawa Lojasiewicza 11, PL-30348 Krakow, Poland..
    Wuestner, P.
    Forschungszentrum Julich, Zent Inst Engn Elekt & Analyt, D-52425 Julich, Germany..
    Yamamoto, A.
    High Energy Accelerator Res Org KEK, Tsukuba, Ibaraki 3050801, Japan..
    Zabierowski, J.
    Natl Ctr Nucl Res, Dept Astrophys, Box 447, PL-90950 Lodz, Poland..
    Zielinski, M. J.
    Jagiellonian Univ, Inst Phys, Prof Stanislawa Lojasiewicza 11, PL-30348 Krakow, Poland..
    Zlomanczuk, Jozef
    Uppsala University, Disciplinary Domain of Science and Technology, Physics, Department of Physics and Astronomy, Nuclear Physics.
    Zupranski, P.
    Natl Ctr Nucl Res, Dept Nucl Phys, Ul Hoza 69, PL-00681 Warsaw, Poland..
    Zurek, M.
    Forschungszentrum Julich, Inst Kernphys, D-52425 Julich, Germany..
    Kubis, B.
    Rhein Friedrich Wilhelms Univ Bonn, Helmholtz Inst Strahlen & Kernphys, Nussallee 14-16, D-53115 Bonn, Germany..
    Leupold, Stefan
    Uppsala University, Disciplinary Domain of Science and Technology, Physics, Department of Physics and Astronomy, Nuclear Physics. Uppsala Univ, Dept Phys & Astron, Div Nucl Phys, Box 516, S-75120 Uppsala, Sweden..
    Measurement of the ω → π+ππ0 Dalitz plot distribution: The WASA-at-COSY Collaboration2017In: Physics Letters B, ISSN 0370-2693, E-ISSN 1873-2445, Vol. 770, p. 418-425Article in journal (Refereed)
    Abstract [en]

    Using the production reactions pd -> He-3 omega and pp -> pp omega, the Dalitz plot distribution for the omega -> pi(+)pi(-)pi(0)decay is studied with the WASA detector at COSY, based on a combined data sample of (4.408 +/- 0.042) x 10(4) events. The Dalitz plot density is parametrised by a product of the P-wave phase space and a polynomial expansion in the normalised polar Dalitz plot variables Z and phi. For the first time, a deviation from pure P-wave phase space is observed with a significance of 4.1 sigma. The deviation is parametrised by a linear term 1+2 alpha Z, with alpha determined to be +0.147 +/- 0.036, consistent with the expectations of rho-meson-type final-state interactions of the P-wave pion pairs. (C) 2017 The Author. Published by Elsevier B.V.

  • 214.
    Adlarson, Patrik
    et al.
    Uppsala University, Disciplinary Domain of Science and Technology, Physics, Department of Physics and Astronomy, Nuclear Physics. Johannes Gutenberg Univ Mainz, Inst Kernphys, Johann Joachim Becher Weg 45, D-55128 Mainz, Germany..
    Augustyniak, W.
    Natl Ctr Nucl Res, Dept Nucl Phys, Ul Hoza 69, PL-00681 Warsaw, Poland..
    Bardan, W.
    Jagiellonian Univ, Inst Phys, Ul Reymonta 4, PL-30059 Krakow, Poland..
    Bashkanov, M.
    Univ Edinburgh, Sch Phys & Astron, James Clerk Maxwell Bldg,Peter Guthrie Tait Rd, Edinburgh EH9 3FD, Midlothian, Scotland.;Univ Tubingen, Inst Phys, Morgenstelle 14, D-72076 Tubingen, Germany..
    Bergmann, F. S.
    Univ Munster, Inst Kernphys, Wilhelm Klemm Str 9, D-48149 Munster, Germany..
    Berlowski, M.
    Natl Ctr Nucl Res, Dept High Energy Phys, Ul Hoza 69, Warsaw, Poland..
    Bhatt, H.
    Indian Inst Technol, Dept Phys, Bombay 400076, Maharashtra, India..
    Bondar, A.
    RAS, SB, Budker Inst Nucl Phys, 11 Akad Lavrentieva Prospect, Novosibirsk 630090, Russia.;Novosibirsk State Univ, 2 Pirogova Str, Novosibirsk, Russia..
    Buscher, M.
    Forschungszentrum Julich, Inst Kernphys, D-52425 Julich, Germany.;Forschungszentrum Julich, Peter Grunberg Inst, PGI Elekt Eigensch 6, D-52425 Julich, Germany..
    Calén, Hans
    Uppsala University, Disciplinary Domain of Science and Technology, Physics, Department of Physics and Astronomy, Nuclear Physics. Uppsala University, The Svedberg Laboratory.
    Ciepa, I.
    Jagiellonian Univ, Inst Phys, Ul Reymonta 4, PL-30059 Krakow, Poland..
    Clement, H.
    Univ Tubingen, Inst Phys, Morgenstelle 14, D-72076 Tubingen, Germany.;Univ Tubingen, Kepler Ctr Astro & Particle Phys, Morgenstelle 14, D-72076 Tubingen, Germany..
    Czerwinski, E.
    Jagiellonian Univ, Inst Phys, Ul Reymonta 4, PL-30059 Krakow, Poland..
    Demmich, K.
    Univ Munster, Inst Kernphys, Wilhelm Klemm Str 9, D-48149 Munster, Germany..
    Engels, R.
    Novosibirsk State Univ, 2 Pirogova Str, Novosibirsk, Russia..
    Erven, A.
    Forschungszentrum Julich, Zentralinst Engn Elekt & Analyt, D-52425 Julich, Germany..
    Erven, W.
    Forschungszentrum Julich, Zentralinst Engn Elekt & Analyt, D-52425 Julich, Germany..
    Eyrich, W.
    Univ Erlangen Nurnberg, Inst Phys, Erwin Rommel Str 1, D-91058 Erlangen, Germany..
    Fedorets, P.
    Forschungszentrum Julich, Inst Kernphys, D-52425 Julich, Germany.;State Sci Ctr Russian Federat, Inst Theoret & Expt Phys, 25 Bolshaya Cheremushkinskaya, Moscow 117218, Russia..
    Foehl, K.
    Univ Giessen, Inst Phys 2, Heinrich Buff Ring 16, D-35392 Giessen, Germany..
    Fransson, Kjell
    Uppsala University, Disciplinary Domain of Science and Technology, Physics, Department of Physics and Astronomy, Nuclear Physics.
    Goldenbaum, F.
    Forschungszentrum Julich, Inst Kernphys, D-52425 Julich, Germany..
    Goswami, A.
    Indian Inst Technol, Dept Phys, Khandwa Rd, Indore 452017, Madhya Pradesh, India..
    Grigoryev, K.
    Forschungszentrum Julich, Inst Kernphys, D-52425 Julich, Germany.;Petersburg Nucl Phys Inst, Div High Energy Phys, 2 Orlova Rosha, St Petersburg 188300, Russia.;Rhein Westfal TH Aachen, Phys Zentrum, Phys Inst B 1, D-52056 Aachen, Germany..
    Gullström, Carl-Oscar
    Uppsala University, Disciplinary Domain of Science and Technology, Physics, Department of Physics and Astronomy, Nuclear Physics.
    Heijkenskjöld, Lena
    Uppsala University, Disciplinary Domain of Science and Technology, Physics, Department of Physics and Astronomy, Nuclear Physics.
    Hejny, V.
    Forschungszentrum Julich, Inst Kernphys, D-52425 Julich, Germany..
    Huesken, N.
    Univ Munster, Inst Kernphys, Wilhelm Klemm Str 9, D-48149 Munster, Germany..
    Jarczyk, L.
    Jagiellonian Univ, Inst Phys, Ul Reymonta 4, PL-30059 Krakow, Poland..
    Johansson, Tord
    Uppsala University, Disciplinary Domain of Science and Technology, Physics, Department of Physics and Astronomy, Nuclear Physics.
    Kamys, B.
    Jagiellonian Univ, Inst Phys, Ul Reymonta 4, PL-30059 Krakow, Poland..
    Kemmerling, G.
    Forschungszentrum Julich, Zentralinst Engn Elekt & Analyt, D-52425 Julich, Germany..
    Khan, F. A.
    Forschungszentrum Julich, Inst Kernphys, D-52425 Julich, Germany..
    Khatri, G.
    Jagiellonian Univ, Inst Phys, Ul Reymonta 4, PL-30059 Krakow, Poland..
    Khoukaz, A.
    Univ Munster, Inst Kernphys, Wilhelm Klemm Str 9, D-48149 Munster, Germany..
    Kirillov, D. A.
    Joint Inst Nucl Phys, Veksler & Baldin Lab High Energiy Phys, 6 Joliot Curie, Dubna 141980, Moscow Region, Russia..
    Kistryn, S.
    Jagiellonian Univ, Inst Phys, Ul Reymonta 4, PL-30059 Krakow, Poland..
    Kleines, H.
    Forschungszentrum Julich, Zentralinst Engn Elekt & Analyt, D-52425 Julich, Germany..
    Klos, B.
    Univ Silesia, August Chelkowski Inst Phys, Uniwersytecka 4, PL-40007 Katowice, Poland..
    Krzemien, W.
    Jagiellonian Univ, Inst Phys, Ul Reymonta 4, PL-30059 Krakow, Poland..
    Kulessa, P.
    Polish Acad Sci, Henryk Niewodniczanski Inst Nucl Phys, 152 Radzikowskiego St, PL-31342 Krakow, Poland..
    Kupsc, Andrzej
    Uppsala University, Disciplinary Domain of Science and Technology, Physics, Department of Physics and Astronomy, Nuclear Physics. Natl Ctr Nucl Res, Dept High Energy Phys, Ul Hoza 69, Warsaw, Poland..
    Kuzmin, A.
    RAS, SB, Budker Inst Nucl Phys, 11 Akad Lavrentieva Prospect, Novosibirsk 630090, Russia.;Novosibirsk State Univ, 2 Pirogova Str, Novosibirsk, Russia..
    Lalwani, K.
    Malaviya Natl Inst Technol Jaipur, Dept Phys, JLN Marg, Jaipur 302017, Rajasthan, India..
    Lersch, D.
    Forschungszentrum Julich, Inst Kernphys, D-52425 Julich, Germany..
    Lorentz, B.
    Forschungszentrum Julich, Inst Kernphys, D-52425 Julich, Germany..
    Magiera, A.
    Jagiellonian Univ, Inst Phys, Ul Reymonta 4, PL-30059 Krakow, Poland..
    Maier, R.
    Forschungszentrum Julich, Inst Kernphys, D-52425 Julich, Germany.;Forschungszentrum Julich, Julich Aachen Res Alliance, JARA FAME, D-52425 Julich, Germany.;Rhein Westfal TH Aachen, D-52056 Aachen, Germany..
    Marciniewski, Pawel
    Uppsala University, Disciplinary Domain of Science and Technology, Physics, Department of Physics and Astronomy, Nuclear Physics.
    Marianski, B.
    Natl Ctr Nucl Res, Dept Nucl Phys, Ul Hoza 69, PL-00681 Warsaw, Poland..
    Morsch, H. -P
    Moskal, P.
    Jagiellonian Univ, Inst Phys, Ul Reymonta 4, PL-30059 Krakow, Poland..
    Ohm, H.
    Forschungszentrum Julich, Inst Kernphys, D-52425 Julich, Germany..
    del Rio, E. Perez
    Univ Tubingen, Inst Phys, Morgenstelle 14, D-72076 Tubingen, Germany.;Ist Nazl Fis Nucl, Nazl Frascati Lab, Via E Fermi 40, I-00044 Rome, Italy..
    Piskunov, N. M.
    Joint Inst Nucl Phys, Veksler & Baldin Lab High Energiy Phys, 6 Joliot Curie, Dubna 141980, Moscow Region, Russia..
    Prasuhn, D.
    Forschungszentrum Julich, Inst Kernphys, D-52425 Julich, Germany..
    Pszczel, Damian
    Uppsala University, Disciplinary Domain of Science and Technology, Physics, Department of Physics and Astronomy, Nuclear Physics. Natl Ctr Nucl Res, Dept High Energy Phys, Ul Hoza 69, Warsaw, Poland..
    Pysz, K.
    Polish Acad Sci, Henryk Niewodniczanski Inst Nucl Phys, 152 Radzikowskiego St, PL-31342 Krakow, Poland..
    Pyszniak, Andrzej
    Uppsala University, Disciplinary Domain of Science and Technology, Physics, Department of Physics and Astronomy, Nuclear Physics. Jagiellonian Univ, Inst Phys, Ul Reymonta 4, PL-30059 Krakow, Poland..
    Ritman, J.
    Forschungszentrum Julich, Inst Kernphys, D-52425 Julich, Germany.;Forschungszentrum Julich, Julich Aachen Res Alliance, JARA FAME, D-52425 Julich, Germany.;Rhein Westfal TH Aachen, D-52056 Aachen, Germany.;Ruhr Univ Bochum, Inst Expt Phys 1, Univ Str 150, D-44780 Bochum, Germany..
    Roy, A.
    Indian Inst Technol, Dept Phys, Khandwa Rd, Indore 452017, Madhya Pradesh, India..
    Rudy, Z.
    Jagiellonian Univ, Inst Phys, Ul Reymonta 4, PL-30059 Krakow, Poland..
    Rundel, O.
    Jagiellonian Univ, Inst Phys, Ul Reymonta 4, PL-30059 Krakow, Poland..
    Sawant, S.
    Indian Inst Technol, Dept Phys, Bombay 400076, Maharashtra, India.;Forschungszentrum Julich, Inst Kernphys, D-52425 Julich, Germany..
    Schadmand, S.
    Forschungszentrum Julich, Inst Kernphys, D-52425 Julich, Germany..
    Schaetti-Ozerianska, I.
    Jagiellonian Univ, Inst Phys, Ul Reymonta 4, PL-30059 Krakow, Poland..
    Sefzick, T.
    Forschungszentrum Julich, Inst Kernphys, D-52425 Julich, Germany..
    Serdyuk, V.
    Forschungszentrum Julich, Inst Kernphys, D-52425 Julich, Germany..
    Shwartz, B.
    RAS, SB, Budker Inst Nucl Phys, 11 Akad Lavrentieva Prospect, Novosibirsk 630090, Russia.;Novosibirsk State Univ, 2 Pirogova Str, Novosibirsk, Russia..
    Sitterberg, K.
    Univ Munster, Inst Kernphys, Wilhelm Klemm Str 9, D-48149 Munster, Germany..
    Siudak, R.
    Polish Acad Sci, Henryk Niewodniczanski Inst Nucl Phys, 152 Radzikowskiego St, PL-31342 Krakow, Poland..
    Skorodko, T.
    Univ Tubingen, Inst Phys, Morgenstelle 14, D-72076 Tubingen, Germany.;Univ Tubingen, Kepler Ctr Astro & Particle Phys, Morgenstelle 14, D-72076 Tubingen, Germany.;Tomsk State Univ, Dept Phys, 36 Lenina Ave, Tomsk 634050, Russia..
    Skurzok, M.
    Jagiellonian Univ, Inst Phys, Ul Reymonta 4, PL-30059 Krakow, Poland..
    Smyrski, J.
    Jagiellonian Univ, Inst Phys, Ul Reymonta 4, PL-30059 Krakow, Poland..
    Sopov, V.
    State Sci Ctr Russian Federat, Inst Theoret & Expt Phys, 25 Bolshaya Cheremushkinskaya, Moscow 117218, Russia..
    Stassen, R.
    Forschungszentrum Julich, Inst Kernphys, D-52425 Julich, Germany..
    Stepaniak, J.
    Natl Ctr Nucl Res, Dept High Energy Phys, Ul Hoza 69, Warsaw, Poland..
    Stephan, E.
    Univ Silesia, August Chelkowski Inst Phys, Uniwersytecka 4, PL-40007 Katowice, Poland..
    Sterzenbach, G.
    Forschungszentrum Julich, Inst Kernphys, D-52425 Julich, Germany..
    Stockhorst, H.
    Forschungszentrum Julich, Inst Kernphys, D-52425 Julich, Germany..
    Stroeher, H.
    Forschungszentrum Julich, Inst Kernphys, D-52425 Julich, Germany.;Forschungszentrum Julich, Julich Aachen Res Alliance, JARA FAME, D-52425 Julich, Germany.;Rhein Westfal TH Aachen, D-52056 Aachen, Germany..
    Szczurek, A.
    Polish Acad Sci, Henryk Niewodniczanski Inst Nucl Phys, 152 Radzikowskiego St, PL-31342 Krakow, Poland..
    Taeschner, A.
    Univ Munster, Inst Kernphys, Wilhelm Klemm Str 9, D-48149 Munster, Germany..
    Trzcinski, A.
    Natl Ctr Nucl Res, Dept Nucl Phys, Ul Hoza 69, PL-00681 Warsaw, Poland..
    Varma, R.
    Indian Inst Technol, Dept Phys, Bombay 400076, Maharashtra, India..
    Wolke, Magnus
    Uppsala University, Disciplinary Domain of Science and Technology, Physics, Department of Physics and Astronomy, Nuclear Physics.
    Wronska, A.
    Jagiellonian Univ, Inst Phys, Ul Reymonta 4, PL-30059 Krakow, Poland..
    Wuestner, P.
    Forschungszentrum Julich, Zentralinst Engn Elekt & Analyt, D-52425 Julich, Germany..
    Yamamoto, A.
    KEK, High Energy Accelerator Res Org, Tsukuba, Ibaraki 3050801, Japan..
    Zabierowski, J.
    Natl Ctr Nucl Res, Dept Astrophys, Box 447, PL-90950 Lodz, Poland..
    Zielinski, M. J.
    Jagiellonian Univ, Inst Phys, Ul Reymonta 4, PL-30059 Krakow, Poland..
    Zink, A.
    Univ Erlangen Nurnberg, Inst Phys, Erwin Rommel Str 1, D-91058 Erlangen, Germany..
    Zlomanczuk, Jozef
    Uppsala University, Disciplinary Domain of Science and Technology, Physics, Department of Physics and Astronomy, Nuclear Physics.
    Zupranski, P.
    Natl Ctr Nucl Res, Dept Nucl Phys, Ul Hoza 69, PL-00681 Warsaw, Poland..
    Zurek, M.
    Forschungszentrum Julich, Inst Kernphys, D-52425 Julich, Germany..
    Measurement of the (n)over-right-arrowp -> d pi(0) pi(0) reaction with polarized beam in the region of the d(*)(2380) resonance2016In: European Physical Journal A, ISSN 1434-6001, E-ISSN 1434-601X, Vol. 52, no 5, p. 1-7, article id 147Article in journal (Refereed)
    Abstract [en]

    We report on a high-statistics measurement of the most basic double-pionic fusion reaction over the energy region of the d (*)(2380) resonance by use of a polarized deuteron beam and observing the double fusion reaction in the quasifree scattering mode. The measurements were performed with the WASA detector setup at COSY. The data reveal substantial analyzing powers and confirm conclusions about the d(*) resonance obtained from unpolarized measurements. We also confirm the previous unpolarized data obtained under complementary kinematic conditions.

  • 215.
    Adlarson, Patrik
    et al.
    Uppsala University, Disciplinary Domain of Science and Technology, Physics, Department of Physics and Astronomy, Nuclear Physics. Johannes Gutenberg Univ Mainz, Inst Kernphys, Johann Joachim Becher Weg 45, D-55128 Mainz, Germany..
    Augustyniak, W.
    Natl Ctr Nucl Res, Dept Nucl Phys, Ul Hoza 69, PL-00681 Warsaw, Poland..
    Bardan, W.
    Bashkanov, M.
    Univ Edinburgh, Sch Phys & Astron, James Clerk Maxwell Bldg,Peter Guthrie Tait Rd, Edinburgh EH9 3FD, Midlothian, Scotland..
    Bergmann, F. S.
    Westfal Wilhelms Univ Munster, Inst Kernphys, Wilhelm Klemm Str 9, D-48149 Munster, Germany..
    Berlowski, M.
    Natl Ctr Nucl Res, High Energy Phys Dept, Ul Hoza 69, PL-00681 Warsaw, Poland..
    Bhatt, H.
    Indian Inst Technol, Dept Phys, Bombay 400076, Maharashtra, India..
    Bondar, A.
    Natl Ctr Nucl Res, Dept Nucl Phys, Ul Hoza 69, PL-00681 Warsaw, Poland.;SB RAS, Budker Inst Nucl Phys, 11 Akad Lavrentieva Prospect, Novosibirsk 630090, Russia.;Novosibirsk State Univ, 2 Pirogova Str, Novosibirsk 630090, Russia.;Forschungszentrum Julich, Zent Inst Engn Elekt & Analyt, D-52425 Julich, Germany..
    Buscher, M.
    Johannes Gutenberg Univ Mainz, Inst Kernphys, Johann Joachim Becher Weg 45, D-55128 Mainz, Germany.;Forschungszentrum Julich, Peter Grunberg Inst, PGI Elekt Eigenschaften 6, D-52425 Julich, Germany.;Heinrich Heine Univ Dusseldorf, Inst Laser & Plasmaphys, Univ Str 1, D-40225 Dusseldorf, Germany..
    Calén, Hans
    Uppsala University, Disciplinary Domain of Science and Technology, Physics, Department of Physics and Astronomy, Nuclear Physics.
    Ciepal, I.
    Jagiellonian Univ, Inst Phys, Ul Reymonta 4, PL-30059 Krakow, Poland..
    Clement, H.
    Eberhard Karls Univ Tubingen, Inst Phys, Morgenstelle 14, D-72076 Tubingen, Germany.;Eberhard Karls Univ Tubingen, Kepler Ctr Astro & Particle Phys, Morgenstelle 14, D-72076 Tubingen, Germany..
    Czerwinski, E.
    Jagiellonian Univ, Inst Phys, Ul Reymonta 4, PL-30059 Krakow, Poland..
    Demmich, K.
    Westfal Wilhelms Univ Munster, Inst Kernphys, Wilhelm Klemm Str 9, D-48149 Munster, Germany..
    Engels, R.
    Forschungszentrum Julich, Inst Kernphys, D-52425 Julich, Germany..
    Erven, A.
    Forschungszentrum Julich, Zent Inst Engn Elekt & Analyt, D-52425 Julich, Germany..
    Erven, W.
    Forschungszentrum Julich, Zent Inst Engn Elekt & Analyt, D-52425 Julich, Germany..
    Eyrich, W.
    Friedrich Alexander Univ Erlangen Nurnberg, Inst Phys, Erwin Rommel Str 1, D-91058 Erlangen, Germany..
    Fedorets, P.
    Forschungszentrum Julich, Inst Kernphys, D-52425 Julich, Germany.;State Sci Ctr Russian Federat, Inst Theoret & Expt Phys, Bolshaya Cheremushkinskaya 25, Moscow 117218, Russia..
    Fohl, K.
    Justus Liebig Univ Giessen, Inst Phys 2, Heinrich Buff Ring 16, D-35392 Giessen, Germany..
    Fransson, Kjell E. I.
    Uppsala University, Disciplinary Domain of Science and Technology, Physics, Department of Physics and Astronomy, Nuclear Physics.
    Goldenbaum, F.
    Forschungszentrum Julich, Inst Kernphys, D-52425 Julich, Germany..
    Goswami, A.
    Forschungszentrum Julich, Inst Kernphys, D-52425 Julich, Germany.;Indian Inst Technol Indore, Dept Phys, Khandwa Rd, Indore 452017, Madhya Pradesh, India..
    Grigoryev, K.
    Forschungszentrum Julich, Inst Kernphys, D-52425 Julich, Germany.;Petersburg Nucl Phys Inst, High Energy Phys Div, Orlova Rosha 2, Gatchina 188300, Leningrad Distr, Russia.;Rhein Westfal TH Aachen, Phys Zentrum, Phys Inst B 3, D-52056 Aachen, Germany..
    Gullstrom, C. -O
    Heijkenskjöld, Lena
    Uppsala University, Disciplinary Domain of Science and Technology, Physics, Department of Physics and Astronomy, Nuclear Physics.
    Hejny, V.
    Forschungszentrum Julich, Inst Kernphys, D-52425 Julich, Germany.;Johannes Gutenberg Univ Mainz, Inst Kernphys, Johann Joachim Becher Weg 45, D-55128 Mainz, Germany..
    Husken, N.
    Westfal Wilhelms Univ Munster, Inst Kernphys, Wilhelm Klemm Str 9, D-48149 Munster, Germany..
    Jarczyk, L.
    Jagiellonian Univ, Inst Phys, Ul Reymonta 4, PL-30059 Krakow, Poland..
    Johansson, Tord
    Uppsala University, Disciplinary Domain of Science and Technology, Physics, Department of Physics and Astronomy, Nuclear Physics.
    Kamys, B.
    Jagiellonian Univ, Inst Phys, Ul Reymonta 4, PL-30059 Krakow, Poland..
    Kemmerling, G.
    Forschungszentrum Julich, Zent Inst Engn Elekt & Analyt, D-52425 Julich, Germany.;Forschungszentrum Julich, JCNS, D-52425 Julich, Germany..
    Khan, F. A.
    Forschungszentrum Julich, Inst Kernphys, D-52425 Julich, Germany..
    Khatri, G.
    Jagiellonian Univ, Inst Phys, Ul Reymonta 4, PL-30059 Krakow, Poland..
    Khoukaz, A.
    Westfal Wilhelms Univ Munster, Inst Kernphys, Wilhelm Klemm Str 9, D-48149 Munster, Germany..
    Khreptak, O.
    Jagiellonian Univ, Inst Phys, Ul Reymonta 4, PL-30059 Krakow, Poland..
    Kirillov, D. A.
    Joint Inst Nucl Res, Veksler & Baldin Lab High Energiy Phys, Joliot Curie 6, Dubna 141980, Moscow Region, Russia..
    Kistryn, S.
    Jagiellonian Univ, Inst Phys, Ul Reymonta 4, PL-30059 Krakow, Poland..
    Kleines, H.
    Forschungszentrum Julich, Zent Inst Engn Elekt & Analyt, D-52425 Julich, Germany.;Forschungszentrum Julich, JCNS, D-52425 Julich, Germany..
    Klos, B.
    Univ Silesia, August Chelkowski Inst Phys, Uniwersytecka 4, PL-40007 Katowice, Poland..
    Krzemien, W.
    Jagiellonian Univ, Inst Phys, Ul Reymonta 4, PL-30059 Krakow, Poland..
    Kulessa, P.
    Polish Acad Sci, Henryk Niewodnicza nski Inst Nucl Phys, 152 Radzikowskiego St, PL-31342 Krakow, Poland..
    Kupsc, Andrzej
    Uppsala University, Disciplinary Domain of Science and Technology, Physics, Department of Physics and Astronomy, Nuclear Physics. Natl Ctr Nucl Res, High Energy Phys Dept, Ul Hoza 69, PL-00681 Warsaw, Poland..
    Kuzmin, A.
    SB RAS, Budker Inst Nucl Phys, 11 Akad Lavrentieva Prospect, Novosibirsk 630090, Russia.;Novosibirsk State Univ, 2 Pirogova Str, Novosibirsk 630090, Russia..
    Lalwani, K.
    Malaviya Natl Inst Technol, Dept Phys, Jaipur 302017, Rajasthan, India..
    Lersch, D.
    Forschungszentrum Julich, Inst Kernphys, D-52425 Julich, Germany..
    Lorentz, B.
    Forschungszentrum Julich, Inst Kernphys, D-52425 Julich, Germany..
    Magiera, A.
    Jagiellonian Univ, Inst Phys, Ul Reymonta 4, PL-30059 Krakow, Poland..
    Maier, R.
    Forschungszentrum Julich, Inst Kernphys, D-52425 Julich, Germany..
    Marcinievski, Pawel
    Uppsala University, Disciplinary Domain of Science and Technology, Physics, Department of Physics and Astronomy, Nuclear Physics.
    Marianski, B.
    Natl Ctr Nucl Res, Dept Nucl Phys, Ul Hoza 69, PL-00681 Warsaw, Poland..
    Morsch, H. -P
    Moskal, P.
    Jagiellonian Univ, Inst Phys, Ul Reymonta 4, PL-30059 Krakow, Poland..
    Ohm, H.
    Forschungszentrum Julich, Inst Kernphys, D-52425 Julich, Germany..
    del Rio, E. Perez
    Eberhard Karls Univ Tubingen, Inst Phys, Morgenstelle 14, D-72076 Tubingen, Germany.;Eberhard Karls Univ Tubingen, Kepler Ctr Astro & Particle Phys, Morgenstelle 14, D-72076 Tubingen, Germany.;Ist Nazl Fis Nucl, Lab Nazl Frascati, Via E Fermi 40, I-00044 Frascati, Italy..
    Piskunov, N. M.
    Joint Inst Nucl Res, Veksler & Baldin Lab High Energiy Phys, Joliot Curie 6, Dubna 141980, Moscow Region, Russia..
    Prasuhnl, D.
    Forschungszentrum Julich, Inst Kernphys, D-52425 Julich, Germany..
    Pszczel, Damian
    Uppsala University, Disciplinary Domain of Science and Technology, Physics, Department of Physics and Astronomy, Nuclear Physics. Natl Ctr Nucl Res, High Energy Phys Dept, Ul Hoza 69, PL-00681 Warsaw, Poland..
    Pysz, K.
    Polish Acad Sci, Henryk Niewodnicza nski Inst Nucl Phys, 152 Radzikowskiego St, PL-31342 Krakow, Poland..
    Pyszniak, Andrzej
    Uppsala University, Disciplinary Domain of Science and Technology, Physics, Department of Physics and Astronomy, Nuclear Physics. Jagiellonian Univ, Inst Phys, Ul Reymonta 4, PL-30059 Krakow, Poland..
    Ritman, J.
    Forschungszentrum Julich, Inst Kernphys, D-52425 Julich, Germany.;Forschungszentrum Julich, Julich Aachen Res Alliance, JARA FAME, D-52425 Julich, Germany.;Rhein Westfal TH Aachen, D-52056 Aachen, Germany.;Ruhr Univ Bochum, Inst Expt Phys 1, Univ Str 150, D-44780 Bochum, Germany..
    Roy, A.
    Indian Inst Technol Indore, Dept Phys, Khandwa Rd, Indore 452017, Madhya Pradesh, India..
    Rudy, Z.
    Jagiellonian Univ, Inst Phys, Ul Reymonta 4, PL-30059 Krakow, Poland..
    Rundel, O.
    Jagiellonian Univ, Inst Phys, Ul Reymonta 4, PL-30059 Krakow, Poland..
    Sawant, S.
    Indian Inst Technol, Dept Phys, Bombay 400076, Maharashtra, India.;Forschungszentrum Julich, Inst Kernphys, D-52425 Julich, Germany..
    Schadmand, S.
    Forschungszentrum Julich, Inst Kernphys, D-52425 Julich, Germany..
    Schatti-Ozerianska, I.
    Jagiellonian Univ, Inst Phys, Ul Reymonta 4, PL-30059 Krakow, Poland..
    Sefzick, T.
    Forschungszentrum Julich, Inst Kernphys, D-52425 Julich, Germany..
    Serdyuk, V.
    Forschungszentrum Julich, Inst Kernphys, D-52425 Julich, Germany..
    Shwartz, B.
    SB RAS, Budker Inst Nucl Phys, 11 Akad Lavrentieva Prospect, Novosibirsk 630090, Russia.;Novosibirsk State Univ, 2 Pirogova Str, Novosibirsk 630090, Russia..
    Sitterberg, K.
    Westfal Wilhelms Univ Munster, Inst Kernphys, Wilhelm Klemm Str 9, D-48149 Munster, Germany..
    Skorodko, T.
    Eberhard Karls Univ Tubingen, Inst Phys, Morgenstelle 14, D-72076 Tubingen, Germany.;Eberhard Karls Univ Tubingen, Kepler Ctr Astro & Particle Phys, Morgenstelle 14, D-72076 Tubingen, Germany.;Tomsk State Univ, Dept Phys, 36 Lenina Ave, Tomsk 634050, Russia..
    Skurzok, M.
    Jagiellonian Univ, Inst Phys, Ul Reymonta 4, PL-30059 Krakow, Poland..
    Smyrski, J.
    Jagiellonian Univ, Inst Phys, Ul Reymonta 4, PL-30059 Krakow, Poland..
    Sopovo, V.
    State Sci Ctr Russian Federat, Inst Theoret & Expt Phys, Bolshaya Cheremushkinskaya 25, Moscow 117218, Russia..
    Stassen, R.
    Forschungszentrum Julich, Inst Kernphys, D-52425 Julich, Germany..
    Stepaniak, J.
    Natl Ctr Nucl Res, High Energy Phys Dept, Ul Hoza 69, PL-00681 Warsaw, Poland..
    Stephan, E.
    Univ Silesia, August Chelkowski Inst Phys, Uniwersytecka 4, PL-40007 Katowice, Poland..
    Sterzenbach, G.
    Forschungszentrum Julich, Inst Kernphys, D-52425 Julich, Germany..
    Stockhorst, H.
    Forschungszentrum Julich, Inst Kernphys, D-52425 Julich, Germany..
    Stroher, H.
    Forschungszentrum Julich, Inst Kernphys, D-52425 Julich, Germany.;Forschungszentrum Julich, Julich Aachen Res Alliance, JARA FAME, D-52425 Julich, Germany.;Rhein Westfal TH Aachen, D-52056 Aachen, Germany..
    Szczurek, A.
    Polish Acad Sci, Henryk Niewodnicza nski Inst Nucl Phys, 152 Radzikowskiego St, PL-31342 Krakow, Poland..
    Trzcinski, A.
    Natl Ctr Nucl Res, Dept Nucl Phys, Ul Hoza 69, PL-00681 Warsaw, Poland..
    Varma, R.
    Indian Inst Technol, Dept Phys, Bombay 400076, Maharashtra, India..
    Wolke, Magnus
    Uppsala University, Disciplinary Domain of Science and Technology, Physics, Department of Physics and Astronomy, Nuclear Physics.
    Wronska, A.
    Jagiellonian Univ, Inst Phys, Ul Reymonta 4, PL-30059 Krakow, Poland..
    Wustner, P.
    Forschungszentrum Julich, Zent Inst Engn Elekt & Analyt, D-52425 Julich, Germany..
    Yamamoto, A.
    Uppsala University, Disciplinary Domain of Science and Technology, Physics, Department of Physics and Astronomy, Nuclear Physics. High Energy Accelerator Res Org KEK, Tsukuba, Ibaraki 3050801, Japan..
    Zabierowski, J.
    Uppsala University, Disciplinary Domain of Science and Technology, Physics, Department of Physics and Astronomy, Nuclear Physics. Natl Ctr Nucl Res, Dept Astrophys, Box 447, PL-90950 Lodz, Poland..
    Zielinski, M. J.
    Jagiellonian Univ, Inst Phys, Ul Reymonta 4, PL-30059 Krakow, Poland..
    Zink, A.
    Friedrich Alexander Univ Erlangen Nurnberg, Inst Phys, Erwin Rommel Str 1, D-91058 Erlangen, Germany..
    Zlomanczuk, Jozef
    Uppsala University, Disciplinary Domain of Science and Technology, Physics, Department of Physics and Astronomy, Nuclear Physics.
    Zupranski, P.
    Natl Ctr Nucl Res, Dept Nucl Phys, Ul Hoza 69, PL-00681 Warsaw, Poland..
    Zurek, M.
    Forschungszentrum Julich, Inst Kernphys, D-52425 Julich, Germany..
    Search for an isospin I=3 dibaryon2016In: Physics Letters B, ISSN 0370-2693, E-ISSN 1873-2445, Vol. 762, p. 455-461Article in journal (Refereed)
    Abstract [en]

    Various theoretical calculations based on QCD or hadronic interactions predict that in addition to the recently observed dibaryon resonance d*(2380) with I(J(P)) = 3(0(+)) there should also exist a dibaryon resonance with mirrored quantum numbers I(J(P)) = 3(0(+)). We report here on a search for such a NN-decoupled state in data on the pp -> pp pi(+) pi(+) pi(-) pi(-) reaction. Since no clear-cut evidence has been found, we give upper limits for the production cross section of such a resonance in the mass range 2280-2500 MeV.

  • 216.
    Adlarson, Patrik
    et al.
    Uppsala University, Disciplinary Domain of Science and Technology, Physics, Department of Physics and Astronomy, Nuclear Physics.
    Augustyniak, W.
    Bardan, W.
    Bashkanov, M.
    Bergmann, F. S.
    Berlowski, M.
    Bhatt, H.
    Buescher, M.
    Calen, Hans
    Uppsala University, Disciplinary Domain of Science and Technology, Physics, Department of Physics and Astronomy, Nuclear Physics.
    Ciepal, I.
    Clement, H.
    Coderre, D.
    Czerwinski, E.
    Demmich, K.
    Doroshkevich, E.
    Engels, R.
    Erven, A.
    Erven, W.
    Eyrich, W.
    Fedorets, P.
    Foehl, K.
    Fransson, Kjell E. I.
    Uppsala University, Disciplinary Domain of Science and Technology, Physics, Department of Physics and Astronomy, Nuclear Physics.
    Goldenbaum, F.
    Goslawski, P.
    Goswami, A.
    Grigoryev, K.
    Gullström, Carl-Oscar
    Uppsala University, Disciplinary Domain of Science and Technology, Physics, Department of Physics and Astronomy, Nuclear Physics.
    Hauenstein, F.
    Heijkenskjoeld, Lena
    Uppsala University, Disciplinary Domain of Science and Technology, Physics, Department of Physics and Astronomy, Nuclear Physics.
    Hejny, V.
    Hodana, M.
    Höistad, Bo
    Uppsala University, Disciplinary Domain of Science and Technology, Physics, Department of Physics and Astronomy, Nuclear Physics.
    Huesken, N.
    Jany, A.
    Jany, B. R.
    Jarczyk, L.
    Johansson, Tord
    Uppsala University, Disciplinary Domain of Science and Technology, Physics, Department of Physics and Astronomy, Nuclear Physics.
    Kamys, B.
    Kemmerling, G.
    Khan, F. A.
    Khoukaz, A.
    Kirillov, D. A.
    Kistryn, S.
    Klos, B.
    Kleines, H.
    Krapp, M.
    Krzemien, W.
    Kulessa, P.
    Kupsc, Andrzej
    Uppsala University, Disciplinary Domain of Science and Technology, Physics, Department of Physics and Astronomy, Nuclear Physics.
    Lalwani, K.
    Lersch, D.
    Lorentz, B.
    Magiera, A.
    Maier, R.
    Marciniewski, Pawel
    Uppsala University, Disciplinary Domain of Science and Technology, Physics, Department of Physics and Astronomy, Nuclear Physics.
    Marianski, B.
    Mikirtychiants, M.
    Morsch, H. -P
    Moskal, P.
    Ohm, H.
    Ozerianska, I.
    Passfeld, A.
    del Rio, E. Perez
    Piskunov, N. M.
    Podkopa, P.
    Prasuhn, D.
    Pricking, A.
    Pszczel, Damian
    Uppsala University, Disciplinary Domain of Science and Technology, Physics, Department of Physics and Astronomy, Nuclear Physics.
    Pysz, K.
    Pyszniak, Andrzej
    Uppsala University, Disciplinary Domain of Science and Technology, Physics, Department of Physics and Astronomy, Nuclear Physics.
    Redmer, C. F.
    Uppsala University, Disciplinary Domain of Science and Technology, Physics, Department of Physics and Astronomy, Nuclear Physics.
    Ritman, J.
    Roy, A.
    Rudy, Z.
    Sawant, S.
    Schadmand, S.
    Sefzick, T.
    Serdyuk, V.
    Siudak, R.
    Skorodko, T.
    Skurzok, M.
    Smyrski, J.
    Sopov, V.
    Stassen, R.
    Stepaniak, J.
    Stephan, E.
    Sterzenbach, G.
    Stockhorst, H.
    Stroeher, H.
    Szczurek, A.
    Taeschner, A.
    Trzcinski, A.
    Varma, R.
    Wagner, G. J.
    Weglorz, W.
    Wolke, Magnus
    Uppsala University, Disciplinary Domain of Science and Technology, Physics, Department of Physics and Astronomy, Nuclear Physics.
    Wronska, A.
    Wuestner, P.
    Wurm, P.
    Yamamoto, A.
    Yurev, L.
    Zabierowski, J.
    Zielinski, M. J.
    Zink, A.
    Zlomanczuk, Jozef
    Uppsala University, Disciplinary Domain of Science and Technology, Physics, Department of Physics and Astronomy, Nuclear Physics.
    Zupranski, P.
    Zurek, M.
    Cross section ratio and angular distributions of the reaction p + d -> He-3 + eta at 48.8MeV and 59.8MeV excess energy2014In: European Physical Journal A, ISSN 1434-6001, E-ISSN 1434-601X, Vol. 50, no 6, p. 100-Article in journal (Refereed)
    Abstract [en]

    We present new data for angular distributions and on the cross section ratio of the p+d -> He-3+eta reaction at excess energies of Q - 48.8MeV and Q - 59.8 MeV. The data have been obtained at the WASA-at-COSY experiment (Forschungszentrum Julich) using a proton beam and a deuterium pellet target. While the shape of obtained angular distributions show only a slow variation with the energy, the new results indicate a distinct and unexpected total cross section fluctuation between Q = 20MeV and Q = 60 MeV, which might indicate the variation of the production mechanism within this energy interval.

  • 217.
    Adlarson, Patrik
    et al.
    Uppsala University, Disciplinary Domain of Science and Technology, Physics, Department of Physics and Astronomy, Nuclear Physics.
    Augustyniak, W.
    Bardan, W.
    Bashkanov, M.
    Bergmann, F. S.
    Berlowski, M.
    Bhatt, H.
    Buescher, M.
    Calen, Hans
    Uppsala University, Disciplinary Domain of Science and Technology, Physics, Department of Physics and Astronomy, Nuclear Physics.
    Ciepal, I.
    Clement, H.
    Coderre, D.
    Czerwinski, E.
    Demmich, K.
    Doroshkevich, E.
    Engels, R.
    Erven, A.
    Erven, W.
    Eyrich, W.
    Fedorets, P.
    Foehl, K.
    Fransson, Kjell
    Uppsala University, Disciplinary Domain of Science and Technology, Physics, Department of Physics and Astronomy, Nuclear Physics.
    Goldenbaum, F.
    Goslawski, P.
    Goswami, A.
    Grigoryev, K.
    Gullström, Carl-Oscar
    Uppsala University, Disciplinary Domain of Science and Technology, Physics, Department of Physics and Astronomy, Nuclear Physics.
    Hauenstein, F.
    Heijkenskjöld, Lena
    Uppsala University, Disciplinary Domain of Science and Technology, Physics, Department of Physics and Astronomy, Nuclear Physics.
    Hejny, V.
    Hodana, M.
    Höistad, Bo
    Uppsala University, Disciplinary Domain of Science and Technology, Physics, Department of Physics and Astronomy, Nuclear Physics.
    Huesken, N.
    Jany, A.
    Jany, B. R.
    Jarczyk, L.
    Johansson, Tord
    Uppsala University, Disciplinary Domain of Science and Technology, Physics, Department of Physics and Astronomy, Nuclear Physics.
    Kamys, B.
    Kemmerling, G.
    Khan, F. A.
    Khoukaz, A.
    Kirillov, D. A.
    Kistryn, S.
    Kleines, H.
    Klos, B.
    Krapp, M.
    Krzemien, W.
    Kulessa, P.
    Kupsc, Andrzej
    Uppsala University, Disciplinary Domain of Science and Technology, Physics, Department of Physics and Astronomy, Nuclear Physics.
    Lalwani, K.
    Lersch, D.
    Lorentz, B.
    Magiera, A.
    Maier, R.
    Marciniewski, Pawel
    Uppsala University, Disciplinary Domain of Science and Technology, Physics, Department of Physics and Astronomy, Nuclear Physics.
    Marianski, B.
    Mikirtychiants, M.
    Morsch, H. -P
    Moskal, P.
    Ohm, H.
    Ozerianska, I.
    del Rio, E. Perez
    Piskunov, N. M.
    Podkopal, P.
    Prasuhn, D.
    Pricking, A.
    Pszczel, Damian
    Uppsala University, Disciplinary Domain of Science and Technology, Physics, Department of Physics and Astronomy, Nuclear Physics.
    Pysz, K.
    Pyszniak, Andrzej
    Uppsala University, Disciplinary Domain of Science and Technology, Physics, Department of Physics and Astronomy, Nuclear Physics.
    Redmer, Christoph F.
    Uppsala University, Disciplinary Domain of Science and Technology, Physics, Department of Physics and Astronomy, Nuclear Physics.
    Ritman, J.
    Roy, A.
    Rudy, Z.
    Sawant, S.
    Schadmand, S.
    Sefzick, T.
    Serdyuk, V.
    Siudak, R.
    Skorodko, T.
    Skurzok, M.
    Smyrski, J.
    Sopov, V.
    Stassen, R.
    Stepaniak, J.
    Stephan, E.
    Sterzenbach, G.
    Stockhorst, H.
    Stroeher, H.
    Szczurek, A.
    Taeschner, A.
    Trzcinski, A.
    Varma, R.
    Wagner, G. J.
    Wolke, Magnus
    Uppsala University, Disciplinary Domain of Science and Technology, Physics, Department of Physics and Astronomy, Nuclear Physics.
    Wronska, A.
    Wuestner, P.
    Wurm, P.
    Yamamoto, A.
    Yurev, L.
    Zabierowski, Janusz
    Uppsala University, Disciplinary Domain of Science and Technology, Physics, Department of Physics and Astronomy, Nuclear Physics.
    Zielinski, M. J.
    Zink, A.
    Zlomanczuk, J.
    Zupranski, P.
    Zurek, M.
    Workman, R. L.
    Briscoe, W. J.
    Strakovsky, I. I.
    Evidence for a New Resonance from Polarized Neutron-Proton Scattering2014In: Physical Review Letters, ISSN 0031-9007, E-ISSN 1079-7114, Vol. 112, no 20, p. 202301-Article in journal (Refereed)
    Abstract [en]

    Exclusive and kinematically complete high-statistics measurements of quasifree polarized (n) over right arrowp scattering have been performed in the energy region of the narrow resonancelike structure d* with I(J(P)) = 0(3(+)),M approximate to 2380 MeV, and Gamma approximate to 70 MeV observed recently in the double-pionic fusion channels pn -> d pi(0)pi(0) and pn -> d pi(+)pi(-). The experiment was carried out with the WASA detector setup at COSY having a polarized deuteron beam impinged on the hydrogen pellet target and utilizing the quasifree process (d) over right arrowp -> np + p(spectator). This allowed the np analyzing power, A(y), to be measured over a broad angular range. The obtained A(y) angular distributions deviate systematically from the current SAID SP07 NN partial-wave solution. Incorporating the new A(y) data into the SAID analysis produces a pole in the D-3(3) - (3)G(3) waves in support of the d* resonance hypothesis.

  • 218.
    Adlarson, Patrik
    et al.
    Uppsala University, Disciplinary Domain of Science and Technology, Physics, Department of Physics and Astronomy, Nuclear Physics.
    Augustyniak, W.
    Bardan, W.
    Bashkanov, M.
    Bergmann, F. S.
    Berlowski, M.
    Bhatt, H.
    Buescher, M.
    Calén, Hans
    Uppsala University, Disciplinary Domain of Science and Technology, Physics, Department of Physics and Astronomy, Nuclear Physics.
    Ciepal, I.
    Clement, H.
    Coderre, D.
    Czerwinski, E.
    Demmich, K.
    Doroshkevich, E.
    Engels, R.
    Erven, A.
    Erven, W.
    Eyrich, W.
    Fedorets, P.
    Foehl, K.
    Fransson, Kjell E
    Uppsala University, Disciplinary Domain of Science and Technology, Physics, Department of Physics and Astronomy, Nuclear Physics.
    Goldenbaum, F.
    Goslawski, P.
    Goswami, A.
    Grigoryev, K.
    Gullström, Carl-Oscar
    Uppsala University, Disciplinary Domain of Science and Technology, Physics, Department of Physics and Astronomy, Nuclear Physics.
    Hauenstein, F.
    Heijkenskjöld, Lena
    Uppsala University, Disciplinary Domain of Science and Technology, Physics, Department of Physics and Astronomy, Nuclear Physics.
    Hejny, V.
    Hodana, M.
    Höistad, Bo
    Uppsala University, Disciplinary Domain of Science and Technology, Physics, Department of Physics and Astronomy, Nuclear Physics.
    Huesken, N.
    Jany, A.
    Jany, B. R.
    Jarczyk, L.
    Johansson, Tord
    Uppsala University, Disciplinary Domain of Science and Technology, Physics, Department of Physics and Astronomy, Nuclear Physics.
    Kamys, B.
    Kemmerling, G.
    Khan, F. A.
    Khoukaz, A.
    Kirillov, D. A.
    Kistryn, S.
    Kleines, H.
    Klos, B.
    Krapp, M.
    Krzemien, W.
    Kulessa, P.
    Kupsc, Andrzej
    Uppsala University, Disciplinary Domain of Science and Technology, Physics, Department of Physics and Astronomy, Nuclear Physics.
    Lalwani, K.
    Lersch, D.
    Lorentz, B.
    Magiera, A.
    Maier, R.
    Marciniewski, Pawel
    Uppsala University, Disciplinary Domain of Science and Technology, Physics, Department of Physics and Astronomy, Nuclear Physics.
    Marianski, B.
    Mikirtychiants, M.
    Morsch, H. -P
    Moskal, P.
    Ohm, H.
    Ozerianska, I.
    del Rio, E. Perez
    Piskunov, N. M.
    Podkopal, P.
    Prasuhn, D.
    Pricking, A.
    Pszczel, D.
    Pysz, K.
    Pyszniak, A.
    Redmer, C. F.
    Uppsala University, Disciplinary Domain of Science and Technology, Physics, Department of Physics and Astronomy, Nuclear Physics.
    Ritman, J.
    Roy, A.
    Rudy, Z.
    Sawant, S.
    Schadmand, S.
    Sefzick, T.
    Serdyuk, V.
    Siudak, R.
    Skorodko, T.
    Skurzok, M.
    Smyrski, J.
    Sopov, V.
    Stassen, R.
    Stepaniak, J.
    Stephan, E.
    Sterzenbach, G.
    Stockhorst, H.
    Stroeher, H.
    Szczurek, A.
    Taeschner, A.
    Trzcinski, A.
    Varma, R.
    Wagner, G. J.
    Wolke, Magnus
    Uppsala University, Disciplinary Domain of Science and Technology, Physics, Department of Physics and Astronomy, Nuclear Physics.
    Wronska, A.
    Wuestner, P.
    Wurm, P.
    Yamamoto, A.
    Yurev, L.
    Zabierowski, J.
    Uppsala University, Disciplinary Domain of Science and Technology, Physics, Department of Physics and Astronomy, Nuclear Physics.
    Zielinski, M. J.
    Zink, A.
    Zlomanczuk, J.
    Zupranski, P.
    Zurek, M.
    Neutron-proton scattering in the context of the d*(2380) resonance2014In: Physical Review C. Nuclear Physics, ISSN 0556-2813, E-ISSN 1089-490X, Vol. 90, no 3, p. 035204-Article in journal (Refereed)
    Abstract [en]

    New data on quasifree polarized neutron-proton scattering in the region of the recently observed d* resonance structure are obtained by exclusive and kinematically complete high-statistics measurements with WASA at COSY. This paper details the determination of the beam polarization, checks of the quasifree character of the scattering process, on all obtained Ay angular distributions and on the new partial-wave analysis, which includes the new data producing a resonance pole in D-3(3)-(3)G(3) coupled partial waves at (2380 +/- 10 - i40 +/- 5) MeV-in accordance with the d* dibaryon resonance hypothesis. The effect of the new partial-wave solution on the description of total and differential cross-section data as well as specific combinations of spin-correlation and spin-transfer observables available from COSY-ANKE measurements at T-d = 2.27 GeV is discussed.

  • 219.
    Adlarson, Patrik
    et al.
    Uppsala University, Disciplinary Domain of Science and Technology, Physics, Department of Physics and Astronomy, Nuclear Physics.
    Augustyniak, W.
    Bardan, W.
    Bashkanov, M.
    Bergmann, F. S.
    Berlowski, M.
    Bhatt, H.
    Buescher, M.
    Calén, Hans
    Uppsala University, Disciplinary Domain of Science and Technology, Physics, Department of Physics and Astronomy, Nuclear Physics.
    Ciepal, I.
    Clement, H.
    Coderre, D.
    Czerwinski, E.
    Demmich, K.
    Doroshkevich, E.
    Engels, R.
    Erven, W.
    Eyrich, W.
    Fedorets, P.
    Foehl, K.
    Fransson, Kjell E. I.
    Uppsala University, Disciplinary Domain of Science and Technology, Physics, Department of Physics and Astronomy, Nuclear Physics.
    Goldenbaum, F.
    Goslawski, P.
    Goswami, A.
    Grigoryev, K.
    Gullström, Carl-Oscar
    Uppsala University, Disciplinary Domain of Science and Technology, Physics, Department of Physics and Astronomy, Nuclear Physics.
    Hanhart, C.
    Hauenstein, F.
    Heijkenskjöld, Lena
    Uppsala University, Disciplinary Domain of Science and Technology, Physics, Department of Physics and Astronomy, Nuclear Physics.
    Hejny, V.
    Hinterberger, F.
    Hodana, M.
    Höistad, Bo
    Uppsala University, Disciplinary Domain of Science and Technology, Physics, Department of Physics and Astronomy, Nuclear Physics.
    Jany, A.
    Jany, B. R.
    Jarczyk, L.
    Johansson, Tord
    Uppsala University, Disciplinary Domain of Science and Technology, Physics, Department of Physics and Astronomy, Nuclear Physics.
    Kamys, B.
    Kemmerling, G.
    Khan, F. A.
    Khoukaz, A.
    Kirillov, D. A.
    Kistryn, S.
    Klaja, J.
    Kleines, H.
    Klos, B.
    Krapp, M.
    Krzemien, W.
    Kulessa, P.
    Kupsc, Andrzej
    Uppsala University, Disciplinary Domain of Science and Technology, Physics, Department of Physics and Astronomy, Nuclear Physics.
    Lalwani, K.
    Lersch, D.
    Li, L.
    Lorentz, B.
    Magiera, A.
    Maier, R.
    Marciniewski, Pawel
    Uppsala University, Disciplinary Domain of Science and Technology, Physics, Department of Physics and Astronomy, Nuclear Physics.
    Marianski, B.
    Mikirtychiants, M.
    Morsch, H. -P
    Moskal, P.
    Nandi, B. K.
    Ohm, H.
    Ozerianska, I.
    del Rio, E. Perez
    Piskunov, N. M.
    Plucinski, P.
    Uppsala University, Disciplinary Domain of Science and Technology, Physics, Department of Physics and Astronomy, Nuclear Physics.
    Podkopal, P.
    Prasuhn, D.
    Pricking, A.
    Pszczel, Damian
    Uppsala University, Disciplinary Domain of Science and Technology, Physics, Department of Physics and Astronomy, Nuclear Physics.
    Pysz, K.
    Pyszniak, Andrzej
    Uppsala University, Disciplinary Domain of Science and Technology, Physics, Department of Physics and Astronomy, Nuclear Physics.
    Redmer, C. F.
    Uppsala University, Disciplinary Domain of Science and Technology, Physics, Department of Physics and Astronomy, Nuclear Physics.
    Ritman, J.
    Roy, A.
    Rudy, Z.
    Sawant, S.
    Schmidt, A.
    Schadmand, S.
    Sefzick, T.
    Serdyuk, V.
    Shah, N.
    Siemaszko, M.
    Siudak, R.
    Skorodko, T.
    Skurzok, M.
    Smyrski, J.
    Sopov, V.
    Stassen, R.
    Stepaniak, J.
    Stephan, E.
    Sterzenbach, G.
    Stockhorst, H.
    Stroeher, H.
    Szczurek, A.
    Tolba, T.
    Trzcinski, A.
    Varma, R.
    Wagner, G. J.
    Weglorz, W.
    Wolke, Magnus
    Uppsala University, Disciplinary Domain of Science and Technology, Physics, Department of Physics and Astronomy, Nuclear Physics.
    Wronska, A.
    Wuestner, P.
    Wurm, P.
    Yamamoto, A.
    Yuan, X.
    Zabierowski, J.
    Zheng, C.
    Zielinski, M. J.
    Zipper, W.
    Zlomanczuk, Josef
    Uppsala University, Disciplinary Domain of Science and Technology, Physics, Department of Physics and Astronomy, Nuclear Physics.
    Zupranski, P.
    Zurek, M.
    Investigation of the dd -> (3)Hen pi(0) reaction with the FZ Julich WASA-at-COSY facility2013In: Physical Review C. Nuclear Physics, ISSN 0556-2813, E-ISSN 1089-490X, Vol. 88, no 1, p. 014004-Article in journal (Refereed)
    Abstract [en]

    An exclusive measurement of the dd -> (3)Hen pi(0) reaction was carried out at a beam momentum of p(d) = 1.2 GeV/c using the WASA-at-COSY facility. Information on the total cross section as well as differential distributions was obtained. The data are described by a phenomenological approach based on a combination of a quasifree model and a partial wave expansion for the three-body reaction. The total cross section is found to be sigma(tot) = ( 2.89 +/- 0.01(stat) +/- 0.06(sys) +/- 0.29(norm)) mu b. The contribution of the quasifree processes ( with the beam or target neutron being a spectator) accounts for 38% of the total cross section and dominates the differential distributions in specific regions of phase space. The remaining part of the cross section can be described by a partial wave decomposition indicating the significance of p-wave contributions in the final state.

  • 220.
    Adlarson, Patrik
    et al.
    Uppsala University, Disciplinary Domain of Science and Technology, Physics, Department of Physics and Astronomy, Nuclear Physics.
    Augustyniak, W.
    Bardan, W.
    Bashkanov, M.
    Bergmann, F. S.
    Berlowski, M.
    Bhatt, H.
    Buescher, M.
    Calén, Hans
    Uppsala University, Disciplinary Domain of Science and Technology, Physics, Department of Physics and Astronomy, Nuclear Physics.
    Ciepal, I.
    Clement, H.
    Coderre, D.
    Czerwinski, E.
    Demmich, K.
    Doroshkevich, E.
    Engels, R.
    Erven, W.
    Eyrich, W.
    Fedorets, P.
    Foehl, K.
    Fransson, Kjell E. I.
    Uppsala University, Disciplinary Domain of Science and Technology, Physics, Department of Physics and Astronomy, Nuclear Physics.
    Goldenbaum, F.
    Goslawski, P.
    Goswami, A.
    Grigoryev, K.
    Gullström, Carl-Oscar
    Uppsala University, Disciplinary Domain of Science and Technology, Physics, Department of Physics and Astronomy, Nuclear Physics.
    Hauenstein, F.
    Heijkenskjöld, Lena
    Uppsala University, Disciplinary Domain of Science and Technology, Physics, Department of Physics and Astronomy, Nuclear Physics.
    Hejny, V.
    Hinterberger, F.
    Hodana, M.
    Höistad, Bo
    Uppsala University, Disciplinary Domain of Science and Technology, Physics, Department of Physics and Astronomy, Nuclear Physics.
    Jany, A.
    Jany, B. R.
    Jarczyk, L.
    Johansson, Tord
    Uppsala University, Disciplinary Domain of Science and Technology, Physics, Department of Physics and Astronomy, Nuclear Physics.
    Kamys, B.
    Kemmerling, G.
    Khan, F. A.
    Khoukaz, A.
    Kirillov, D. A.
    Kistryn, S.
    Klaja, J.
    Kleines, H.
    Klos, B.
    Krapp, M.
    Krzemien, W.
    Kulessa, P.
    Kupsc, Andrzej
    Uppsala University, Disciplinary Domain of Science and Technology, Physics, Department of Physics and Astronomy, Nuclear Physics.
    Lalwani, K.
    Lersch, D.
    Li, L.
    Lorentz, B.
    Magiera, A.
    Maier, R.
    Marciniewski, Pawel
    Uppsala University, Disciplinary Domain of Science and Technology, Physics, Department of Physics and Astronomy, Nuclear Physics.
    Marianski, B.
    Mikirtychiants, M.
    Morsch, H. -P
    Moskal, P.
    Nandi, B. K.
    Ohm, H.
    Ozerianska, I.
    del Rio, E. Perez
    Piskunov, N. M.
    Plucinski, P.
    Uppsala University, Disciplinary Domain of Science and Technology, Physics, Department of Physics and Astronomy, Nuclear Physics.
    Podkopal, P.
    Prasuhn, D.
    Pricking, A.
    Pszczel, Damian
    Uppsala University, Disciplinary Domain of Science and Technology, Physics, Department of Physics and Astronomy, Nuclear Physics.
    Pysz, K.
    Pyszniak, Andrzej
    Uppsala University, Disciplinary Domain of Science and Technology, Physics, Department of Physics and Astronomy, Nuclear Physics.
    Redmer, C. F.
    Uppsala University, Disciplinary Domain of Science and Technology, Physics, Department of Physics and Astronomy, Nuclear Physics.
    Ritman, J.
    Roy, A.
    Rudy, Z.
    Sawant, S.
    Schmidt, A.
    Schadmand, S.
    Sefzick, T.
    Serdyuk, V.
    Shah, N.
    Siemaszko, M.
    Siudak, R.
    Skorodko, T.
    Skurzok, M.
    Smyrski, J.
    Sopov, V.
    Stassen, R.
    Stepaniak, J.
    Stephan, E.
    Sterzenbach, G.
    Stockhorst, H.
    Stroeher, H.
    Szczurek, A.
    Tolba, T.
    Trzcinski, A.
    Varma, R.
    Wagner, G. J.
    Eglorz, W. W.
    Wolke, Magnus
    Uppsala University, Disciplinary Domain of Science and Technology, Physics, Department of Physics and Astronomy, Nuclear Physics.
    Wronska, A.
    Wuestner, P.
    Wurm, P.
    Yamamoto, A.
    Yuan, X.
    Zabierowski, J.
    Zheng, C.
    Zielinski, M. J.
    Zipper, W.
    Zlomanczuk, Jozef
    Uppsala University, Disciplinary Domain of Science and Technology, Physics, Department of Physics and Astronomy, Nuclear Physics.
    Zupranski, P.
    Zurek, M.
    Measurement of the pn -> pp pi(0)pi(-) reaction in search for the recently observed resonance structure in d pi(0)pi(0) and d pi(+)pi(-) systems2013In: Physical Review C. Nuclear Physics, ISSN 0556-2813, E-ISSN 1089-490X, Vol. 88, no 5, p. 055208-Article in journal (Refereed)
    Abstract [en]

    Exclusive measurements of the quasifree pn -> pp pi(0)pi(-) reaction have been performed by means of pd collisions at T-p = 1.2 GeV using the wide angle shower apparatus (WASA) detector setup at the cooler synchrotron COSY (Institut fur Kernphysik, Julich). Total and differential cross sections have been obtained covering the energy region root s = (2.35-2.46) GeV, which includes the region of the ABC effect and its associated resonance structure. NoABCeffect, i.e., low-mass enhancement is found in the pi(0)pi(-) -invariant mass spectrum, in agreement with the constraint from Bose statistics that the isovector pion pair can not be in relative s wave. At the upper end of the covered energy region t-channel processes for Roper, Delta(1600) and Delta Delta excitations provide a reasonable description of the data, but at low energies the measured cross sections are much larger than predicted by such processes. Adding a resonance amplitude for the resonance at m = 2.37 GeV with Gamma = 70 MeV and I (J(P)) = 0(3(+)) observed recently in pn -> d pi(0)pi(0) and pn -> d pi(+)pi(-) reactions leads to an agreement with the data also at low energies.

  • 221.
    Adlarson, Patrik
    et al.
    Uppsala University, Disciplinary Domain of Science and Technology, Physics, Department of Physics and Astronomy, Nuclear Physics. Johannes Gutenberg Univ Mainz, Inst Kernphys, Johann Joachim Becher Weg 45, D-55128 Mainz, Germany.
    Augustyniak, W.
    Natl Ctr Nucl Res, Dept Nucl Phys, Ul Hoza 69, PL-00681 Warsaw, Poland.
    Bardan, W.
    Jagiellonian Univ, Inst Phys, Prof Stanislawa Lojasiewicza 11, PL-30348 Krakow, Poland.
    Bashkanov, M.
    Univ Edinburgh, Sch Phys & Astron, James Clerk Maxwell Bldg,Peter Guthrie Tait Rd, Edinburgh EH9 3FD, Midlothian, Scotland.
    Bergmann, F. S.
    Westfal Wilhelms Univ Munster, Inst Kernphys, Wilhelm Klemm Str 9, D-48149 Munster, Germany.
    Berlowski, M.
    Natl Ctr Nucl Res, Dept High Energy Phys, Ul Hoza 69, PL-00681 Warsaw, Poland.
    Bondar, A.
    SB RAS, Budker Inst Nucl Phys, 11 Akad Lavrentieva Prospect, Novosibirsk 630090, Russia;Novosibirsk State Univ, 2 Pirogova Str, Novosibirsk 630090, Russia.
    Buescher, M.
    Forschungszentrum Julich, Peter Grunberg Inst, PGI Elektron Eigenschaften 6, D-52425 Julich, Germany;Heinrich Heine Univ Dusseldorf, Inst Laser & Plasmaphys, Univ Str 1, D-40225 Dusseldorf, Germany.
    Calén, Hans
    Uppsala University, Disciplinary Domain of Science and Technology, Physics, Department of Physics and Astronomy, Nuclear Physics.
    Ciepal, I.
    Polish Acad Sci, Henryk Niewodniczanski Inst Nucl Phys, Radzikowskiego 152, PL-31342 Krakow, Poland.
    Clement, H.
    Eberhard Karls Univ Tubingen, Phys Inst, Morgenstelle 14, D-72076 Tubingen, Germany;Univ Tubingen, Phys Inst, Kepler Ctr Astro & Teilchenphys, Morgenstelle 14, D-72076 Tubingen, Germany.
    Czerwinski, E.
    Jagiellonian Univ, Inst Phys, Prof Stanislawa Lojasiewicza 11, PL-30348 Krakow, Poland.
    Demmich, K.
    Westfal Wilhelms Univ Munster, Inst Kernphys, Wilhelm Klemm Str 9, D-48149 Munster, Germany.
    Engels, R.
    Forschungszentrum Julich, Inst Kernphys, D-52425 Julich, Germany.
    Erven, A.
    Forschungszentrum Julich, Zent Inst Engn Elekt & Analyt, D-52425 Julich, Germany.
    Erven, W.
    Forschungszentrum Julich, Zent Inst Engn Elekt & Analyt, D-52425 Julich, Germany.
    Eyrich, W.
    Friedrich Alexander Univ Erlangen Nurnberg, Phys Inst, Erwin Rommel Str 1, D-91058 Erlangen, Germany.
    Fedorets, P.
    Forschungszentrum Julich, Inst Kernphys, D-52425 Julich, Germany;Natl Res Ctr, Kurchatov Inst, Inst Theoret & Expt Phys, 25 Bolshaya Cheremushkinskaya, Moscow 117218, Russia.
    Foehl, K.
    Justus Liebig Univ Giessen, Phys Inst 2, Heinrich Buff Ring 16, D-35392 Giessen, Germany.
    Fransson, Kjell
    Uppsala University, Disciplinary Domain of Science and Technology, Physics, Department of Physics and Astronomy, Nuclear Physics.
    Goldenbaum, F.
    Forschungszentrum Julich, Inst Kernphys, D-52425 Julich, Germany.
    Goswami, A.
    Forschungszentrum Julich, Inst Kernphys, D-52425 Julich, Germany;Indian Inst Technol Indore, Dept Phys, Khandwa Rd, Indore 453552, Madhya Pradesh, India.
    Grigoryev, K.
    Forschungszentrum Julich, Inst Kernphys, D-52425 Julich, Germany;Natl Res Ctr, Kurchatov Inst, Div High Energy Phys, Petersburg Nucl Phys Inst, 1 Mkr Orlova Roshcha, Gatchina 188300, Russia.
    Gullström, Carl-Oskar
    Uppsala University, Disciplinary Domain of Science and Technology, Physics, Department of Physics and Astronomy, Nuclear Physics.
    Hanhart, C.
    Forschungszentrum Julich, Inst Kernphys, D-52425 Julich, Germany;Forschungszentrum Julich, Inst Adv Simulat, D-52425 Julich, Germany.
    Heijkenskjöld, Lena
    Uppsala University, Disciplinary Domain of Science and Technology, Physics, Department of Physics and Astronomy, Nuclear Physics.
    Hejny, V.
    Forschungszentrum Julich, Inst Kernphys, D-52425 Julich, Germany.
    Huesken, N.
    Westfal Wilhelms Univ Munster, Inst Kernphys, Wilhelm Klemm Str 9, D-48149 Munster, Germany.
    Jarczyk, L.
    Jagiellonian Univ, Inst Phys, Prof Stanislawa Lojasiewicza 11, PL-30348 Krakow, Poland.
    Johansson, Tord
    Uppsala University, Disciplinary Domain of Science and Technology, Physics, Department of Physics and Astronomy, Nuclear Physics.
    Kamys, B.
    Jagiellonian Univ, Inst Phys, Prof Stanislawa Lojasiewicza 11, PL-30348 Krakow, Poland.
    Kemmerling, G.
    Forschungszentrum Julich, Zent Inst Engn Elekt & Analyt, D-52425 Julich, Germany;Forschungszentrum Julich, JCNS, D-52425 Julich, Germany.
    Khatri, G.
    Jagiellonian Univ, Inst Phys, Prof Stanislawa Lojasiewicza 11, PL-30348 Krakow, Poland;Harvard Univ, Dept Phys, 17 Oxford St, Cambridge, MA 02138 USA.
    Khoukaz, A.
    Westfal Wilhelms Univ Munster, Inst Kernphys, Wilhelm Klemm Str 9, D-48149 Munster, Germany.
    Khreptak, O.
    Jagiellonian Univ, Inst Phys, Prof Stanislawa Lojasiewicza 11, PL-30348 Krakow, Poland.
    Kirillov, D. A.
    Joint Inst Nucl Phys, Veksler & Baldin Lab High Energy Phys, 6 Joliot Curie, Dubna 141980, Russia.
    Kistryn, S.
    Jagiellonian Univ, Inst Phys, Prof Stanislawa Lojasiewicza 11, PL-30348 Krakow, Poland.
    Kleines, H.
    Forschungszentrum Julich, Zent Inst Engn Elekt & Analyt, D-52425 Julich, Germany;Forschungszentrum Julich, JCNS, D-52425 Julich, Germany.
    Klos, B.
    Univ Silesia, August Chelkowski Inst Phys, Uniwersytecka 4, PL-40007 Katowice, Poland.
    Krzemien, W.
    Natl Ctr Nucl Res, Dept High Energy Phys, Ul Hoza 69, PL-00681 Warsaw, Poland.
    Kulessa, P.
    Polish Acad Sci, Henryk Niewodniczanski Inst Nucl Phys, Radzikowskiego 152, PL-31342 Krakow, Poland.
    Kupsc, Andrzej
    Uppsala University, Disciplinary Domain of Science and Technology, Physics, Department of Physics and Astronomy, Nuclear Physics. Natl Ctr Nucl Res, Dept High Energy Phys, Ul Hoza 69, PL-00681 Warsaw, Poland.
    Kuzmin, A.
    SB RAS, Budker Inst Nucl Phys, 11 Akad Lavrentieva Prospect, Novosibirsk 630090, Russia;Novosibirsk State Univ, 2 Pirogova Str, Novosibirsk 630090, Russia.
    Lalwani, K.
    Malaviya Natl Inst Technol Jaipur, Dept Phys, JLN Marg, Jaipur 302017, Rajasthan, India.
    Lersch, D.
    Forschungszentrum Julich, Inst Kernphys, D-52425 Julich, Germany.
    Lorentz, B.
    Forschungszentrum Julich, Inst Kernphys, D-52425 Julich, Germany.
    Magiera, A.
    Jagiellonian Univ, Inst Phys, Prof Stanislawa Lojasiewicza 11, PL-30348 Krakow, Poland.
    Maier, R.
    Forschungszentrum Julich, Inst Kernphys, D-52425 Julich, Germany;Forschungszentrum Julich, Julich Aachen Res Alliance, JARA FAME, D-52425 Julich, Germany;Rhein Westfal TH Aachen, D-52056 Aachen, Germany.
    Marciniewski, Pawel
    Uppsala University, Disciplinary Domain of Science and Technology, Physics, Department of Physics and Astronomy, Nuclear Physics.
    Marianski, B.
    Natl Ctr Nucl Res, Dept Nucl Phys, Ul Hoza 69, PL-00681 Warsaw, Poland.
    Morsch, H. -P
    Moskal, P.
    Jagiellonian Univ, Inst Phys, Prof Stanislawa Lojasiewicza 11, PL-30348 Krakow, Poland.
    Ohm, H.
    Forschungszentrum Julich, Inst Kernphys, D-52425 Julich, Germany.
    Parol, W.
    Polish Acad Sci, Henryk Niewodniczanski Inst Nucl Phys, Radzikowskiego 152, PL-31342 Krakow, Poland.
    del Rio, E. Perez
    Eberhard Karls Univ Tubingen, Phys Inst, Morgenstelle 14, D-72076 Tubingen, Germany;Univ Tubingen, Phys Inst, Kepler Ctr Astro & Teilchenphys, Morgenstelle 14, D-72076 Tubingen, Germany;Ist Nazl Fis Nucl, Lab Nazl Frascati, Via E Fermi 40, I-00044 Rome, Italy.
    Piskunov, N. M.
    Joint Inst Nucl Phys, Veksler & Baldin Lab High Energy Phys, 6 Joliot Curie, Dubna 141980, Russia.
    Prasuhn, D.
    Forschungszentrum Julich, Inst Kernphys, D-52425 Julich, Germany.
    Pszczel, Damian
    Uppsala University, Disciplinary Domain of Science and Technology, Physics, Department of Physics and Astronomy, Nuclear Physics. Natl Ctr Nucl Res, Dept High Energy Phys, Ul Hoza 69, PL-00681 Warsaw, Poland.
    Pysz, K.
    Polish Acad Sci, Henryk Niewodniczanski Inst Nucl Phys, Radzikowskiego 152, PL-31342 Krakow, Poland.
    Pyszniak, A.
    Uppsala University, Disciplinary Domain of Science and Technology, Physics, Department of Physics and Astronomy, Nuclear Physics. Jagiellonian Univ, Inst Phys, Prof Stanislawa Lojasiewicza 11, PL-30348 Krakow, Poland.
    Ritman, J.
    Forschungszentrum Julich, Inst Kernphys, D-52425 Julich, Germany;Forschungszentrum Julich, Julich Aachen Res Alliance, JARA FAME, D-52425 Julich, Germany;Rhein Westfal TH Aachen, D-52056 Aachen, Germany;Ruhr Univ Bochum, Inst Expt Phys 1, Univ Str 150, D-44780 Bochum, Germany.
    Roy, A.
    Indian Inst Technol Indore, Dept Phys, Khandwa Rd, Indore 453552, Madhya Pradesh, India.
    Rudy, Z.
    Jagiellonian Univ, Inst Phys, Prof Stanislawa Lojasiewicza 11, PL-30348 Krakow, Poland.
    Rundel, O.
    Jagiellonian Univ, Inst Phys, Prof Stanislawa Lojasiewicza 11, PL-30348 Krakow, Poland.
    Sawant, S.
    Indian Inst Technol, Dept Phys, Bombay 400076, Maharashtra, India.
    Schadmand, S.
    Forschungszentrum Julich, Inst Kernphys, D-52425 Julich, Germany.
    Schatti-Ozerianska, I.
    Jagiellonian Univ, Inst Phys, Prof Stanislawa Lojasiewicza 11, PL-30348 Krakow, Poland.
    Sefzick, T.
    Forschungszentrum Julich, Inst Kernphys, D-52425 Julich, Germany.
    Serdyuk, V.
    Forschungszentrum Julich, Inst Kernphys, D-52425 Julich, Germany.
    Shwartz, B.
    SB RAS, Budker Inst Nucl Phys, 11 Akad Lavrentieva Prospect, Novosibirsk 630090, Russia;Novosibirsk State Univ, 2 Pirogova Str, Novosibirsk 630090, Russia.
    Sitterberg, K.
    Westfal Wilhelms Univ Munster, Inst Kernphys, Wilhelm Klemm Str 9, D-48149 Munster, Germany.
    Skorodko, T.
    Eberhard Karls Univ Tubingen, Phys Inst, Morgenstelle 14, D-72076 Tubingen, Germany;Univ Tubingen, Phys Inst, Kepler Ctr Astro & Teilchenphys, Morgenstelle 14, D-72076 Tubingen, Germany;Tomsk State Univ, Dept Phys, 36 Lenina Ave, Tomsk 634050, Russia.
    Skurzok, M.
    Jagiellonian Univ, Inst Phys, Prof Stanislawa Lojasiewicza 11, PL-30348 Krakow, Poland.
    Smyrski, J.
    Jagiellonian Univ, Inst Phys, Prof Stanislawa Lojasiewicza 11, PL-30348 Krakow, Poland.
    Sopov, V.
    Natl Res Ctr, Kurchatov Inst, Inst Theoret & Expt Phys, 25 Bolshaya Cheremushkinskaya, Moscow 117218, Russia.
    Stassen, R.
    Forschungszentrum Julich, Inst Kernphys, D-52425 Julich, Germany.
    Stepaniak, J.
    Natl Ctr Nucl Res, Dept High Energy Phys, Ul Hoza 69, PL-00681 Warsaw, Poland.
    Stephan, E.
    Univ Silesia, August Chelkowski Inst Phys, Uniwersytecka 4, PL-40007 Katowice, Poland.
    Sterzenbach, G.
    Forschungszentrum Julich, Inst Kernphys, D-52425 Julich, Germany.
    Stockhorst, H.
    Forschungszentrum Julich, Inst Kernphys, D-52425 Julich, Germany.
    Stroeher, H.
    Forschungszentrum Julich, Inst Kernphys, D-52425 Julich, Germany;Forschungszentrum Julich, Julich Aachen Res Alliance, JARA FAME, D-52425 Julich, Germany;Rhein Westfal TH Aachen, D-52056 Aachen, Germany.
    Szczurek, A.
    Polish Acad Sci, Henryk Niewodniczanski Inst Nucl Phys, Radzikowskiego 152, PL-31342 Krakow, Poland.
    Trzcinski, A.
    Natl Ctr Nucl Res, Dept Nucl Phys, Ul Hoza 69, PL-00681 Warsaw, Poland.
    Wolke, Magnus
    Uppsala University, Disciplinary Domain of Science and Technology, Physics, Department of Physics and Astronomy, Nuclear Physics.
    Wronska, A.
    Jagiellonian Univ, Inst Phys, Prof Stanislawa Lojasiewicza 11, PL-30348 Krakow, Poland.
    Wuenstner, P.
    Forschungszentrum Julich, Zent Inst Engn Elekt & Analyt, D-52425 Julich, Germany.
    Yamamoto, A.
    High Energy Accelerator Res Org KEK, Tsukuba, Ibaraki 3050801, Japan.
    Zabierowski, J.
    Natl Ctr Nucl Res, Div Astrophys, Box 447, PL-90950 Lodz, Poland.
    Zielinski, M. J.
    Jagiellonian Univ, Inst Phys, Prof Stanislawa Lojasiewicza 11, PL-30348 Krakow, Poland.
    Zlomanczuk, Jozef
    Uppsala University, Disciplinary Domain of Science and Technology, Physics, Department of Physics and Astronomy, Nuclear Physics.
    Zupranski, P.
    Natl Ctr Nucl Res, Dept Nucl Phys, Ul Hoza 69, PL-00681 Warsaw, Poland.
    Zurek, M.
    Forschungszentrum Julich, Inst Kernphys, D-52425 Julich, Germany.
    Importance of d-wave contributions in the charge symmetry breaking reaction dd -> He-4 pi(0)2018In: Physics Letters B, ISSN 0370-2693, E-ISSN 1873-2445, Vol. 781, p. 645-650Article in journal (Refereed)
    Abstract [en]

    This letter reports a first quantitative analysis of the contribution of higher partial waves in the charge symmetry breaking reaction dd -> He-4 pi(0) using the WASA-at-COSY detector setup at an excess energy of Q = 60 MeV. The determined differential cross section can be parametrized as d sigma/d Omega = a + b cos(2) theta*, where theta* is the production angle of the pion in the center-of-mass coordinate system, and the results for the parameters are a = (1.55 +/- 0.46(stat)(-0.8)(+0.32)(syst)) pb/sr and b = (13.1 +/- 2.1(stat)(-2.7)(+1.0)(syst)) pb/sr. The data are compatible with vanishing p-waves and a sizable d-wave contribution. This finding should strongly constrain the contribution of the A isobar to the dd -> He-4 pi(0) reaction and is, therefore, crucial for a quantitative understanding of quark mass effects in nuclear production reactions.

  • 222.
    Adlarson, Patrik
    et al.
    Uppsala University, Disciplinary Domain of Science and Technology, Physics, Department of Physics and Astronomy, Nuclear Physics.
    Augustyniak, W.
    Natl Ctr Nucl Res, Dept Nucl Phys, Ul Hoza 69, PL-00681 Warsaw, Poland.
    Bardan, W.
    Jagiellonian Univ, Inst Phys, Prof Stanislawa Lojasiewicza 11, PL-30348 Krakow, Poland.
    Bashkanov, M.
    Univ Edinburgh, Sch Phys & Astron, James Clerk Maxwell Bldg,Peter Guthrie Tait Rd, Edinburgh EH9 3FD, Midlothian, Scotland.
    Bergmann, F. S.
    Westfalische Wilhelms Univ Munster, Inst Kernphys, Wilhelm Klemm Str 9, D-48149 Munster, Germany.
    Berlowski, M.
    Natl Ctr Nucl Res, High Energy Phys Dept, Ul Hoza 69, PL-00681 Warsaw, Poland.
    Bondar, A.
    RAS, Budker Inst Nucl Phys SB, 11 Akad Lavrentieva Prospect, Novosibirsk 630090, Russia;Novosibirsk State Univ, 2 Pirogova Str, Novosibirsk 630090, Russia.
    Buescher, M.
    Forschungszentrum Julich, PGI Elekt Eigenschaften 6, Peter Grunberg Inst, D-52425 Julich, Germany;Heinrich Heine Univ Dusseldorf, Inst Laser & Plasmaphys, Univ Str 1, D-40225 Dusseldorf, Germany.
    Calén, Hans
    Uppsala University, Disciplinary Domain of Science and Technology, Physics, Department of Physics and Astronomy, Nuclear Physics.
    Ciepal, I.
    Polish Acad Sci, Henryk Niewodniczanski Inst Nucl Phys, Radzikowskiego 152, PL-31342 Krakow, Poland.
    Clement, H.
    Eberhard Karls Univ Tubingen, Phys Inst, Morgenstelle 14, D-72076 Tubingen, Germany;Univ Tubingen, Phys Inst, Kepler Ctr Astro & Teilchenphys, Morgenstelle 14, D-72076 Tubingen, Germany.
    Czerwinski, E.
    Jagiellonian Univ, Inst Phys, Prof Stanislawa Lojasiewicza 11, PL-30348 Krakow, Poland.
    Demmich, K.
    Westfalische Wilhelms Univ Munster, Inst Kernphys, Wilhelm Klemm Str 9, D-48149 Munster, Germany.
    Engels, R.
    Forschungszentrum Julich, Inst Kernphys, D-52425 Julich, Germany.
    Erven, A.
    Forschungszentrum Julich, Zentralinst Engn Elekt & Analyt, D-52425 Julich, Germany.
    Erven, W.
    Forschungszentrum Julich, Zentralinst Engn Elekt & Analyt, D-52425 Julich, Germany.
    Eyrich, W.
    Friedrich Alexander Univ Erlangen Nurnberg, Phys Inst, Erwin Rommel Str 1, D-91058 Erlangen, Germany.
    Fedorets, P.
    Forschungszentrum Julich, Inst Kernphys, D-52425 Julich, Germany;Kurchatov Inst, Natl Res Ctr, Inst Theoret & Expt Phys, 25 Bolshaya Cheremushkinskaya, Moscow 117911, Russia.
    Foehl, K.
    Justus Liebig Univ Giessen, Phys Inst 2, Heinrich Buff Ring 16, D-35392 Giessen, Germany.
    Fransson, Kjell
    Uppsala University, Disciplinary Domain of Science and Technology, Physics, Department of Physics and Astronomy, Nuclear Physics.
    Goldenbaum, F.
    Forschungszentrum Julich, Inst Kernphys, D-52425 Julich, Germany.
    Goswami, A.
    Forschungszentrum Julich, Inst Kernphys, D-52425 Julich, Germany;Indian Inst Technol Indore, Dept Phys, Khandwa Rd, Indore 453552, Madhya Pradesh, India.
    Grigoryev, K.
    Forschungszentrum Julich, Inst Kernphys, D-52425 Julich, Germany;Kurchatov Inst, Natl Res Ctr, Petersburg Nucl Phys Inst, High Energy Phys Div, 1 Mkr Orlova Roshcha, Gatchina 188300, Russia.
    Gullström, Carl-Oskar
    Uppsala University, Disciplinary Domain of Science and Technology, Physics, Department of Physics and Astronomy, Nuclear Physics.
    Heijkenskjöld, Lena
    Uppsala University, Disciplinary Domain of Science and Technology, Physics, Department of Physics and Astronomy, Nuclear Physics.
    Hejny, V.
    Forschungszentrum Julich, Inst Kernphys, D-52425 Julich, Germany.
    Huesken, N.
    Westfalische Wilhelms Univ Munster, Inst Kernphys, Wilhelm Klemm Str 9, D-48149 Munster, Germany.
    Jarczyk, L.
    Jagiellonian Univ, Inst Phys, Prof Stanislawa Lojasiewicza 11, PL-30348 Krakow, Poland.
    Johansson, Tord
    Uppsala University, Disciplinary Domain of Science and Technology, Physics, Department of Physics and Astronomy, Nuclear Physics.
    Kamys, B.
    Jagiellonian Univ, Inst Phys, Prof Stanislawa Lojasiewicza 11, PL-30348 Krakow, Poland.
    Kemmerling, G.
    Forschungszentrum Julich, Zentralinst Engn Elekt & Analyt, D-52425 Julich, Germany;Forschungszentrum Julich, JCNS, D-52425 Julich, Germany.
    Khatri, G.
    Jagiellonian Univ, Inst Phys, Prof Stanislawa Lojasiewicza 11, PL-30348 Krakow, Poland;Harvard Univ, Dept Phys, 17 Oxford St, Cambridge, MA 02138 USA.
    Khoukaz, A.
    Westfalische Wilhelms Univ Munster, Inst Kernphys, Wilhelm Klemm Str 9, D-48149 Munster, Germany.
    Khreptak, A.
    Jagiellonian Univ, Inst Phys, Prof Stanislawa Lojasiewicza 11, PL-30348 Krakow, Poland.
    Kirillov, D. A.
    Joint Inst Nucl Res, Veksler & Baldin Lab High Energy Phys, 6 Joliot Curie, Dubna 141980, Russia.
    Kistryn, S.
    Jagiellonian Univ, Inst Phys, Prof Stanislawa Lojasiewicza 11, PL-30348 Krakow, Poland.
    Kleines, H.
    Forschungszentrum Julich, Zentralinst Engn Elekt & Analyt, D-52425 Julich, Germany;Forschungszentrum Julich, JCNS, D-52425 Julich, Germany.
    Klos, B.
    Univ Silesia, August Chelkowski Inst Phys, Uniwersytecka 4, PL-40007 Katowice, Poland.
    Krzemien, W.
    Natl Ctr Nucl Res, High Energy Phys Dept, Ul Hoza 69, PL-00681 Warsaw, Poland.
    Kulessa, P.
    Polish Acad Sci, Henryk Niewodniczanski Inst Nucl Phys, Radzikowskiego 152, PL-31342 Krakow, Poland.
    Kupsc, Andrzej
    Uppsala University, Disciplinary Domain of Science and Technology, Physics, Department of Physics and Astronomy, Nuclear Physics.
    Kuzmin, A.
    RAS, Budker Inst Nucl Phys SB, 11 Akad Lavrentieva Prospect, Novosibirsk 630090, Russia;Novosibirsk State Univ, 2 Pirogova Str, Novosibirsk 630090, Russia.
    Lalwani, K.
    Malaviya Natl Inst Technol Jaipur, Dept Phys, JLN Marg, Jaipur 302017, Rajasthan, India.
    Lersch, D.
    Forschungszentrum Julich, Inst Kernphys, D-52425 Julich, Germany.
    Lorentz, B.
    Forschungszentrum Julich, Inst Kernphys, D-52425 Julich, Germany.
    Magiera, A.
    Jagiellonian Univ, Inst Phys, Prof Stanislawa Lojasiewicza 11, PL-30348 Krakow, Poland.
    Maier, R.
    Forschungszentrum Julich, Inst Kernphys, D-52425 Julich, Germany;Forschungszentrum Julich, Julich Aachen Res Alliance, JARA FAME, Aachen, Germany;Rhein Westfal TH Aachen, Aachen, Germany.
    Marciniewski, Pawel
    Uppsala University, Disciplinary Domain of Science and Technology, Physics, Department of Physics and Astronomy, Nuclear Physics.
    Marianski, B.
    Natl Ctr Nucl Res, Dept Nucl Phys, Ul Hoza 69, PL-00681 Warsaw, Poland.
    Morsch, H. -P
    Moskal, P.
    Jagiellonian Univ, Inst Phys, Prof Stanislawa Lojasiewicza 11, PL-30348 Krakow, Poland.
    Ohm, H.
    Forschungszentrum Julich, Inst Kernphys, D-52425 Julich, Germany.
    Parol, W.
    Polish Acad Sci, Henryk Niewodniczanski Inst Nucl Phys, Radzikowskiego 152, PL-31342 Krakow, Poland.
    del Rio, E. Perez
    Eberhard Karls Univ Tubingen, Phys Inst, Morgenstelle 14, D-72076 Tubingen, Germany;Univ Tubingen, Phys Inst, Kepler Ctr Astro & Teilchenphys, Morgenstelle 14, D-72076 Tubingen, Germany;INFN, Lab Nazl Frascati, Via E Fermi 40, I-00044 Frascati, Roma, Italy.
    Piskunov, N. M.
    Joint Inst Nucl Res, Veksler & Baldin Lab High Energy Phys, 6 Joliot Curie, Dubna 141980, Russia.
    Prasuhn, D.
    Forschungszentrum Julich, Inst Kernphys, D-52425 Julich, Germany.
    Pszczel, Damian
    Uppsala University, Disciplinary Domain of Science and Technology, Physics, Department of Physics and Astronomy, Nuclear Physics.
    Pysz, K.
    Polish Acad Sci, Henryk Niewodniczanski Inst Nucl Phys, Radzikowskiego 152, PL-31342 Krakow, Poland.
    Pyszniak, Andzej
    Uppsala University, Disciplinary Domain of Science and Technology, Physics, Department of Physics and Astronomy, Nuclear Physics.
    Ritman, J.
    Forschungszentrum Julich, Inst Kernphys, D-52425 Julich, Germany;Forschungszentrum Julich, Julich Aachen Res Alliance, JARA FAME, Aachen, Germany;Rhein Westfal TH Aachen, Aachen, Germany;Ruhr Univ Bochum, Inst Expt Phys 1, Univ Str 150, D-44780 Bochum, Germany.
    Roy, A.
    Indian Inst Technol Indore, Dept Phys, Khandwa Rd, Indore 453552, Madhya Pradesh, India.
    Rudy, Z.
    Jagiellonian Univ, Inst Phys, Prof Stanislawa Lojasiewicza 11, PL-30348 Krakow, Poland.
    Rundel, O.
    Jagiellonian Univ, Inst Phys, Prof Stanislawa Lojasiewicza 11, PL-30348 Krakow, Poland.
    Sawant, S.
    Ruhr Univ Bochum, Inst Expt Phys 1, Univ Str 150, D-44780 Bochum, Germany.
    Schadmand, S.
    Forschungszentrum Julich, Inst Kernphys, D-52425 Julich, Germany.
    Schatti-Ozerianska, I.
    Jagiellonian Univ, Inst Phys, Prof Stanislawa Lojasiewicza 11, PL-30348 Krakow, Poland.
    Sefzick, T.
    Forschungszentrum Julich, Inst Kernphys, D-52425 Julich, Germany.
    Serdyuk, V.
    Forschungszentrum Julich, Inst Kernphys, D-52425 Julich, Germany.
    Shwartz, B.
    RAS, Budker Inst Nucl Phys SB, 11 Akad Lavrentieva Prospect, Novosibirsk 630090, Russia;Novosibirsk State Univ, 2 Pirogova Str, Novosibirsk 630090, Russia.
    Sitterberg, K.
    Westfalische Wilhelms Univ Munster, Inst Kernphys, Wilhelm Klemm Str 9, D-48149 Munster, Germany.
    Skorodko, T.
    Eberhard Karls Univ Tubingen, Phys Inst, Morgenstelle 14, D-72076 Tubingen, Germany;Univ Tubingen, Phys Inst, Kepler Ctr Astro & Teilchenphys, Morgenstelle 14, D-72076 Tubingen, Germany;Tomsk State Univ, Dept Phys, 36 Lenina Ave, Tomsk 634050, Russia.
    Skurzok, M.
    Jagiellonian Univ, Inst Phys, Prof Stanislawa Lojasiewicza 11, PL-30348 Krakow, Poland.
    Smyrski, J.
    Jagiellonian Univ, Inst Phys, Prof Stanislawa Lojasiewicza 11, PL-30348 Krakow, Poland.
    Sopov, V.
    Kurchatov Inst, Natl Res Ctr, Inst Theoret & Expt Phys, 25 Bolshaya Cheremushkinskaya, Moscow 117911, Russia.
    Stassen, R.
    Forschungszentrum Julich, Inst Kernphys, D-52425 Julich, Germany.
    Stepaniak, J.
    Natl Ctr Nucl Res, High Energy Phys Dept, Ul Hoza 69, PL-00681 Warsaw, Poland.
    Stephan, E.
    Univ Silesia, August Chelkowski Inst Phys, Uniwersytecka 4, PL-40007 Katowice, Poland.
    Sterzenbach, G.
    Forschungszentrum Julich, Inst Kernphys, D-52425 Julich, Germany.
    Stockhorst, H.
    Forschungszentrum Julich, Inst Kernphys, D-52425 Julich, Germany.
    Stroeher, H.
    Forschungszentrum Julich, Inst Kernphys, D-52425 Julich, Germany;Forschungszentrum Julich, Julich Aachen Res Alliance, JARA FAME, Aachen, Germany;Rhein Westfal TH Aachen, Aachen, Germany.
    Szczurek, A.
    Polish Acad Sci, Henryk Niewodniczanski Inst Nucl Phys, Radzikowskiego 152, PL-31342 Krakow, Poland.
    Trzcinski, A.
    Natl Ctr Nucl Res, Dept Nucl Phys, Ul Hoza 69, PL-00681 Warsaw, Poland.
    Wolke, Magnus
    Uppsala University, Disciplinary Domain of Science and Technology, Physics, Department of Physics and Astronomy, Nuclear Physics.
    Wronska, A.
    Jagiellonian Univ, Inst Phys, Prof Stanislawa Lojasiewicza 11, PL-30348 Krakow, Poland.
    Wuestner, P.
    Forschungszentrum Julich, Zentralinst Engn Elekt & Analyt, D-52425 Julich, Germany.
    Yamamoto, A.
    High Energy Accelerator Res Org KEK, Tsukuba, Ibaraki 3050801, Japan.
    Zabierowski, J.
    Natl Ctr Nucl Res, Astrophys Div, Box 447, PL-90950 Lodz, Poland.
    Zielinski, M. J.
    Jagiellonian Univ, Inst Phys, Prof Stanislawa Lojasiewicza 11, PL-30348 Krakow, Poland.
    Zlomanczuk, Jozef
    Uppsala University, Disciplinary Domain of Science and Technology, Physics, Department of Physics and Astronomy, Nuclear Physics.
    Zupranski, P.
    Natl Ctr Nucl Res, Dept Nucl Phys, Ul Hoza 69, PL-00681 Warsaw, Poland.
    Zurek, M.
    Forschungszentrum Julich, Inst Kernphys, D-52425 Julich, Germany.
    Wilkin, C.
    UCL, Phys & Astron Dept, Gower St, London WC1E 6BT, England.
    Backward single-pion production in the pd -> He-3 pi(0)reaction with WASA-at-COSY2018In: European Physical Journal A, ISSN 1434-6001, E-ISSN 1434-601X, Vol. 54, no 9, article id 149Article in journal (Refereed)
    Abstract [en]

    New data on the production of single neutral pions in the pd -> He-3 pi(0) reaction are presented. For fifteen proton beam momenta between p(p) = 1.60GeV/c and p(p) = 1.74 GeV/c, differential cross sections are determined over a large fraction of the backward hemisphere. Since the only previous systematic measurements of single-pion production at these energies were made in collinear kinematics, the present work constitutes a significant extension of the current knowledge on this reaction. Even this far above the production threshold, significant changes are found in the behaviour of the angular distributions over small intervals in beam momentum.

  • 223.
    Adlarson, Patrik
    et al.
    Uppsala University, Disciplinary Domain of Science and Technology, Physics, Department of Physics and Astronomy, Nuclear Physics.
    Augustyniak, W.
    Natl Ctr Nucl Res, Div Nucl Phys, Ul Hoza 69, PL-00681 Warsaw, Poland.
    Bardan, W.
    Jagiellonian Univ, Inst Phys, Prof Stanislawa Lojasiewicza 11, PL-30348 Krakow, Poland.
    Bashkanov, M.
    Univ York, Dept Phys, York YO10 5DD, N Yorkshire, England.
    Bergmann, F. S.
    Westfalische Wilhelms Univ Munster, Inst Kernphys, Wilhelm Klemm Str 9, D-48149 Munster, Germany.
    Berlowski, M.
    Natl Ctr Nucl Res, High Energy Phys Div, Ul Hoza 69, PL-00681 Warsaw, Poland.
    Bondar, A.
    RAS, SB, Budker Inst Nucl Phys, 11 Acad Lavrentieva Pr, Novosibirsk 630090, Russia;Novosibirsk State Univ, 2 Pirogova Str, Novosibirsk 630090, Russia.
    Buescher, M.
    Forschungszentrum Julich, Peter Grunberg Inst, PGI 6 Elekt Eigenschaften, D-52425 Julich, Germany;Heinrich Heine Univ Dusseldorf, Inst Laser & Plasmaphys, Univ Str 1, D-40225 Dusseldorf, Germany.
    Calén, Hans
    Uppsala University, Disciplinary Domain of Science and Technology, Physics, Department of Physics and Astronomy, Nuclear Physics.
    Ciepal, I.
    Polish Acad Sci, Henryk Niewodniczanski Inst Nucl Phys, Ul Radzikowskiego 152, PL-31342 Krakow, Poland.
    Clement, H.
    Eberhard Karls Univ Tubingen, Inst Phys, Morgenstelle 14, D-72076 Tubingen, Germany;Univ Tubingen, Inst Phys, Kepler Ctr Astro & Particle Phys, Morgenstelle 14, D-72076 Tubingen, Germany.
    Czerwinski, E.
    Jagiellonian Univ, Inst Phys, Prof Stanislawa Lojasiewicza 11, PL-30348 Krakow, Poland.
    Demmich, K.
    Westfalische Wilhelms Univ Munster, Inst Kernphys, Wilhelm Klemm Str 9, D-48149 Munster, Germany.
    Engels, R.
    Forschungszentrum Julich, Inst Kernphys, D-52425 Julich, Germany.
    Erven, A.
    Forschungszentrum Julich, Zent Inst Engn Elekt & Analyt, D-52425 Julich, Germany.
    Erven, W.
    Forschungszentrum Julich, Zent Inst Engn Elekt & Analyt, D-52425 Julich, Germany.
    Eyrich, W.
    Friedrich Alexander Univ Erlangen Nurnberg, Inst Phys, Erwin Rommel Str 1, D-91058 Erlangen, Germany.
    Fedorets, P.
    Forschungszentrum Julich, Inst Kernphys, D-52425 Julich, Germany;Natl Res Ctr Kurchatov Inst, Inst Theoret & Expt Phys, 25 Bolshaya Cheremushkinskaya Str, Moscow 117218, Russia.
    Foehl, K.
    Justus Liebig Univ Giessen, Inst Phys 2, Heinrich Buff Ring 16, D-35392 Giessen, Germany.
    Fransson, Kjell
    Uppsala University, Disciplinary Domain of Science and Technology, Physics, Department of Physics and Astronomy, Nuclear Physics.
    Goldenbaum, F.
    Forschungszentrum Julich, Inst Kernphys, D-52425 Julich, Germany.
    Goswami, A.
    Forschungszentrum Julich, Inst Kernphys, D-52425 Julich, Germany;Indian Inst Technol Indore, Discipline Phys, Khandwa Rd, Indore 453552, Madhya Pradesh, India.
    Grigoryev, K.
    Forschungszentrum Julich, Inst Kernphys, D-52425 Julich, Germany;Natl Res Ctr Kurchatov Inst, High Energy Phys Div, Petersburg Nucl Phys Inst, 1 Mkr Orlova roshcha, Gatchina 188300, Leningradskaya, Russia.
    Heijkenskjöld, Lena
    Uppsala University, Disciplinary Domain of Science and Technology, Physics, Department of Physics and Astronomy, Nuclear Physics. Johannes Gutenberg Univ Mainz, Inst Kernphys, Johann Joachim Becher Weg 45, D-55128 Mainz, Germany.
    Hejny, V.
    Forschungszentrum Julich, Inst Kernphys, D-52425 Julich, Germany.
    Huesken, N.
    Westfalische Wilhelms Univ Munster, Inst Kernphys, Wilhelm Klemm Str 9, D-48149 Munster, Germany.
    Jarczyk, L.
    Jagiellonian Univ, Inst Phys, Prof Stanislawa Lojasiewicza 11, PL-30348 Krakow, Poland.
    Johansson, Tord
    Uppsala University, Disciplinary Domain of Science and Technology, Physics, Department of Physics and Astronomy, Nuclear Physics.
    Kamys, B.
    Jagiellonian Univ, Inst Phys, Prof Stanislawa Lojasiewicza 11, PL-30348 Krakow, Poland.
    Kemmerling, G.
    Forschungszentrum Julich, Zent Inst Engn Elekt & Analyt, D-52425 Julich, Germany;Forschungszentrum Julich, JCNS, D-52425 Julich, Germany.
    Khoukaz, A.
    Westfalische Wilhelms Univ Munster, Inst Kernphys, Wilhelm Klemm Str 9, D-48149 Munster, Germany.
    Khreptak, O.
    Jagiellonian Univ, Inst Phys, Prof Stanislawa Lojasiewicza 11, PL-30348 Krakow, Poland.
    Kirillov, D. A.
    Joint Inst Nucl Phys, Veksler & Baldin Lab High Energiy Phys, 6 Joliot Curie, Dubna 141980, Russia.
    Kistryn, S.
    Jagiellonian Univ, Inst Phys, Prof Stanislawa Lojasiewicza 11, PL-30348 Krakow, Poland.
    Kleines, H.
    Forschungszentrum Julich, Zent Inst Engn Elekt & Analyt, D-52425 Julich, Germany;Forschungszentrum Julich, JCNS, D-52425 Julich, Germany.
    Klos, B.
    Univ Silesia, August Chelkowski Inst Phys, Ul 75 Pulku Piechoty 1, PL-41500 Chorzow, Poland.
    Krzemien, W.
    Natl Ctr Nucl Res, High Energy Phys Div, Ul Hoza 69, PL-00681 Warsaw, Poland.
    Kulessa, P.
    Polish Acad Sci, Henryk Niewodniczanski Inst Nucl Phys, Ul Radzikowskiego 152, PL-31342 Krakow, Poland.
    Kupsc, Andrzej
    Uppsala University, Disciplinary Domain of Science and Technology, Physics, Department of Physics and Astronomy, Nuclear Physics. Natl Ctr Nucl Res, High Energy Phys Div, Ul Hoza 69, PL-00681 Warsaw, Poland.
    Lalwani, K.
    Malaviya Natl Inst Technol Jaipur, Dept Phys, JLN Marg, Jaipur 302017, Rajasthan, India.
    Lersch, D.
    Forschungszentrum Julich, Inst Kernphys, D-52425 Julich, Germany;Florida State Univ, Dept Phys, 77 Chieftan Way, Tallahassee, FL 32306 USA.
    Lorentz, B.
    Forschungszentrum Julich, Inst Kernphys, D-52425 Julich, Germany.
    Magiera, A.
    Jagiellonian Univ, Inst Phys, Prof Stanislawa Lojasiewicza 11, PL-30348 Krakow, Poland.
    Maier, R.
    Forschungszentrum Julich, Inst Kernphys, D-52425 Julich, Germany;Forschungszentrum Julich, JARA FAME, Julich Aachen Res Alliance, D-52425 Julich, Germany;Rhein Westfal TH Aachen, D-52056 Aachen, Germany.
    Marciniewski, Pawel
    Uppsala University, Disciplinary Domain of Science and Technology, Physics, Department of Physics and Astronomy, Nuclear Physics.
    Marianski, B.
    Natl Ctr Nucl Res, Div Nucl Phys, Ul Hoza 69, PL-00681 Warsaw, Poland.
    Morsch, H. -P
    Moskal, P.
    Jagiellonian Univ, Inst Phys, Prof Stanislawa Lojasiewicza 11, PL-30348 Krakow, Poland.
    Ohm, H.
    Forschungszentrum Julich, Inst Kernphys, D-52425 Julich, Germany.
    Parol, W.
    Polish Acad Sci, Henryk Niewodniczanski Inst Nucl Phys, Ul Radzikowskiego 152, PL-31342 Krakow, Poland.
    del Rio, E. Perez
    Eberhard Karls Univ Tubingen, Inst Phys, Morgenstelle 14, D-72076 Tubingen, Germany;Univ Tubingen, Inst Phys, Kepler Ctr Astro & Particle Phys, Morgenstelle 14, D-72076 Tubingen, Germany;Ist Nazl Fis Nucl, Lab Nazl Frascati, Via E Fermi 40, I-00044 Frascati, Italy.
    Piskunov, N. M.
    Joint Inst Nucl Phys, Veksler & Baldin Lab High Energiy Phys, 6 Joliot Curie, Dubna 141980, Russia.
    Prasuhn, D.
    Forschungszentrum Julich, Inst Kernphys, D-52425 Julich, Germany.
    Pszczel, Damian
    Uppsala University, Disciplinary Domain of Science and Technology, Physics, Department of Physics and Astronomy, Nuclear Physics. Natl Ctr Nucl Res, High Energy Phys Div, Ul Hoza 69, PL-00681 Warsaw, Poland.
    Pysz, K.
    Polish Acad Sci, Henryk Niewodniczanski Inst Nucl Phys, Ul Radzikowskiego 152, PL-31342 Krakow, Poland.
    Ritman, J.
    Forschungszentrum Julich, Inst Kernphys, D-52425 Julich, Germany;Forschungszentrum Julich, JARA FAME, Julich Aachen Res Alliance, D-52425 Julich, Germany;Rhein Westfal TH Aachen, D-52056 Aachen, Germany;Ruhr Univ Bochum, Inst Expt Phys 1, Univ Str 150, D-44780 Bochum, Germany.
    Roy, A.
    Indian Inst Technol Indore, Discipline Phys, Khandwa Rd, Indore 453552, Madhya Pradesh, India.
    Rudy, Z.
    Jagiellonian Univ, Inst Phys, Prof Stanislawa Lojasiewicza 11, PL-30348 Krakow, Poland.
    Rundel, O.
    Jagiellonian Univ, Inst Phys, Prof Stanislawa Lojasiewicza 11, PL-30348 Krakow, Poland.
    Sawant, S.
    Indian Inst Technol, Dept Phys, Mumbai 400076, Maharashtra, India.
    Schadmand, S.
    Forschungszentrum Julich, Inst Kernphys, D-52425 Julich, Germany.
    Schatti-Ozerianska, I.
    Jagiellonian Univ, Inst Phys, Prof Stanislawa Lojasiewicza 11, PL-30348 Krakow, Poland.
    Sefzick, T.
    Forschungszentrum Julich, Inst Kernphys, D-52425 Julich, Germany.
    Serdyuk, V.
    Forschungszentrum Julich, Inst Kernphys, D-52425 Julich, Germany.
    Shwartz, B.
    RAS, SB, Budker Inst Nucl Phys, 11 Acad Lavrentieva Pr, Novosibirsk 630090, Russia;Novosibirsk State Univ, 2 Pirogova Str, Novosibirsk 630090, Russia.
    Skorodko, T.
    Eberhard Karls Univ Tubingen, Inst Phys, Morgenstelle 14, D-72076 Tubingen, Germany;Univ Tubingen, Inst Phys, Kepler Ctr Astro & Particle Phys, Morgenstelle 14, D-72076 Tubingen, Germany;Tomsk State Univ, Dept Phys, 36 Lenin Ave, Tomsk 634050, Russia.
    Skurzok, M.
    Jagiellonian Univ, Inst Phys, Prof Stanislawa Lojasiewicza 11, PL-30348 Krakow, Poland.
    Smyrski, J.
    Jagiellonian Univ, Inst Phys, Prof Stanislawa Lojasiewicza 11, PL-30348 Krakow, Poland.
    Sopov, V.
    Natl Res Ctr Kurchatov Inst, Inst Theoret & Expt Phys, 25 Bolshaya Cheremushkinskaya Str, Moscow 117218, Russia.
    Stassen, R.
    Forschungszentrum Julich, Inst Kernphys, D-52425 Julich, Germany.
    Stepaniak, J.
    Natl Ctr Nucl Res, High Energy Phys Div, Ul Hoza 69, PL-00681 Warsaw, Poland.
    Stephan, E.
    Univ Silesia, August Chelkowski Inst Phys, Ul 75 Pulku Piechoty 1, PL-41500 Chorzow, Poland.
    Sterzenbach, G.
    Forschungszentrum Julich, Inst Kernphys, D-52425 Julich, Germany.
    Stockhorst, H.
    Forschungszentrum Julich, Inst Kernphys, D-52425 Julich, Germany.
    Stroeher, H.
    Forschungszentrum Julich, Inst Kernphys, D-52425 Julich, Germany;Forschungszentrum Julich, JARA FAME, Julich Aachen Res Alliance, D-52425 Julich, Germany;Rhein Westfal TH Aachen, D-52056 Aachen, Germany.
    Szczurek, A.
    Polish Acad Sci, Henryk Niewodniczanski Inst Nucl Phys, Ul Radzikowskiego 152, PL-31342 Krakow, Poland.
    Trzcinski, A.
    Natl Ctr Nucl Res, Div Nucl Phys, Ul Hoza 69, PL-00681 Warsaw, Poland.
    Wolke, Magnus
    Uppsala University, Disciplinary Domain of Science and Technology, Physics, Department of Physics and Astronomy, Nuclear Physics.
    Wronska, A.
    Jagiellonian Univ, Inst Phys, Prof Stanislawa Lojasiewicza 11, PL-30348 Krakow, Poland.
    Wuestner, P.
    Forschungszentrum Julich, Zent Inst Engn Elekt & Analyt, D-52425 Julich, Germany.
    Yamamoto, A.
    High Energy Accelerator Res Org KEK, Tsukuba, Ibaraki 3050801, Japan.
    Zabierowski, J.
    Natl Ctr Nucl Res, Div Astrophys, Box 447, PL-90950 Lodz, Poland.
    Zielinski, M. J.
    Jagiellonian Univ, Inst Phys, Prof Stanislawa Lojasiewicza 11, PL-30348 Krakow, Poland.
    Zlomanczuk, Jozef
    Uppsala University, Disciplinary Domain of Science and Technology, Physics, Department of Physics and Astronomy, Nuclear Physics.
    Zupranski, P.
    Natl Ctr Nucl Res, Div Nucl Phys, Ul Hoza 69, PL-00681 Warsaw, Poland.
    Zurek, M.
    Forschungszentrum Julich, Inst Kernphys, D-52425 Julich, Germany.
    Examination of the production of an isotensor dibaryon in the pp -> pp pi(+)pi(-) reaction2019In: Physical Review C: Covering Nuclear Physics, ISSN 2469-9985, E-ISSN 2469-9993, Vol. 99, no 2, article id 025201Article in journal (Refereed)
    Abstract [en]

    The quasifree pp -> pp pi(+)pi(-) reaction has been measured by means of pd collisions at T-p = 1.2 GeV using the WASA detector setup at COSY enabling exclusive and kinematically complete measurements. Total and differential cross sections have been extracted for the energy region T-p = 1.08-1.36 GeV (root s = 2.35-2.46 GeV) covering thus the regions of N* (1440 ) and Delta(1232)Delta(1232) resonance excitations. Calculations describing these excitations by t-channel meson exchange as well as isospin relations based on the pp -> pp pi(0)pi(0) data underpredict substantially the measured total cross section. The calculations are also at variance with specific experimental differential cross sections. An isotensor Delta N dibaryon resonance with I(J(P)) = 2(1(+) ) produced associatedly with a pion is able to overcome these deficiencies. Such a dibaryon was predicted by Dyson and Xuong [Phys. Rev. Lett. 13, 815 (1964)] and more recently calculated by A. Gal and H. Garcilazo [Nucl. Phys. A 928, 73 (2014)].

  • 224.
    Adlarson, Patrik
    et al.
    Uppsala University, Disciplinary Domain of Science and Technology, Physics, Department of Physics and Astronomy, Nuclear Physics.
    Augustyniak, W.
    Natl Ctr Nucl Res, Div Nucl Phys, Ulica Hoza 69, PL-00681 Warsaw, Poland.
    Bardan, W.
    Jagiellonian Univ, Inst Phys, Ulica Prof Stanislawa Lojasiewicza 11, PL-30348 Krakow, Poland.
    Bashkanov, M.
    Univ York, Dept Phys, York YO10 5DD, N Yorkshire, England.
    Bergmann, F. S.
    Westfalische Wilhelms Univ Munster, Inst Kernphys, Wilhelm Klemm Str 9, D-48149 Munster, Germany.
    Berlowski, M.
    Natl Ctr Nucl Res, Div High Energy Phys, Ulica Hoza 69, PL-00681 Warsaw, Poland.
    Bondar, A.
    Novosibirsk State Univ, 2 Pirogova Ulitsa, Novosibirsk 630090, Russia;Budker Inst Nucl Phys SB RAS, 11 Akad Lavrentieva Prospekt, Novosibirsk 630090, Russia.
    Buescher, M.
    Heinrich Heine Univ Dusseldorf, Inst Laser & Plasmaphys, Univ Str 1, D-40225 Dusseldorf, Germany;Forschungszentrum Julich, Peter Grunberg Inst, PGI Elektron Eigenschaften 6, D-52425 Julich, Germany.
    Calén, Hans
    Uppsala University, Disciplinary Domain of Science and Technology, Physics, Department of Physics and Astronomy, Nuclear Physics.
    Ciepal, I.
    Polish Acad Sci, Henryk Niewodniczanski Inst Nucl Phys, Ulica Radzikowskiego 152, PL-31342 Krakow, Poland.
    Clement, H.
    Eberhard Karls Univ Tubingen, Phys Inst, Morgenstelle 14, D-72076 Tubingen, Germany;Univ Tubingen, Phys Inst, Kepler Ctr Astro & Particle Phys, Morgenstelle 14, D-72076 Tubingen, Germany.
    Czerwinski, E.
    Jagiellonian Univ, Inst Phys, Ulica Prof Stanislawa Lojasiewicza 11, PL-30348 Krakow, Poland.
    Demmich, K.
    Westfalische Wilhelms Univ Munster, Inst Kernphys, Wilhelm Klemm Str 9, D-48149 Munster, Germany.
    Engels, R.
    Forschungszentrum Julich, Inst Kernphys, D-52425 Julich, Germany.
    Erven, A.
    Forschungszentrum Julich, Zent Inst Engn Elektron & Analyt, D-52425 Julich, Germany.
    Erven, W.
    Forschungszentrum Julich, Zent Inst Engn Elektron & Analyt, D-52425 Julich, Germany.
    Eyrich, W.
    Friedrich Alexander Univ Erlangen Nurnberg, Phys Inst, Erwin Rommel Str 1, D-91058 Erlangen, Germany.
    Fedorets, P.
    Forschungszentrum Julich, Inst Kernphys, D-52425 Julich, Germany;Natl Res Ctr Kurchatov Inst, Inst Theoret & Expt Phys, 25 Bolshaya Cheremushkinskaya Ulitsa, Moscow 117218, Russia.
    Foehl, K.
    Justus Liebig Univ Giessen, Phys Inst 2, Heinrich Buff Ring 16, D-35392 Giessen, Germany.
    Fransson, Kjell
    Uppsala University, Disciplinary Domain of Science and Technology, Physics, Department of Physics and Astronomy, Nuclear Physics.
    Goldenbaum, F.
    Forschungszentrum Julich, Inst Kernphys, D-52425 Julich, Germany.
    Goswami, A.
    Forschungszentrum Julich, Inst Kernphys, D-52425 Julich, Germany;Indian Inst Technol Indore, Discipline Phys, Khandwa Rd, Indore 453552, Madhya Pradesh, India.
    Grigoryev, K.
    Forschungszentrum Julich, Inst Kernphys, D-52425 Julich, Germany;Natl Res Ctr Kurchatov Inst, Petersburg Nucl Phys Inst, High Energy Phys Div, 1 Mikrorajon Orlova Roshcha, Gatchina 188300, Leningradskaya, Russia.
    Heijkenskjöld, Lena
    Uppsala University, Disciplinary Domain of Science and Technology, Physics, Department of Physics and Astronomy, Nuclear Physics. Johannes Gutenberg Univ Mainz, Inst Kernphys, Johann Joachim Becher Weg 45, D-55128 Mainz, Germany.
    Hejny, V.
    Forschungszentrum Julich, Inst Kernphys, D-52425 Julich, Germany.
    Huesken, N.
    Westfalische Wilhelms Univ Munster, Inst Kernphys, Wilhelm Klemm Str 9, D-48149 Munster, Germany.
    Jarczyk, L.
    Jagiellonian Univ, Inst Phys, Ulica Prof Stanislawa Lojasiewicza 11, PL-30348 Krakow, Poland.
    Johansson, Tord
    Uppsala University, Disciplinary Domain of Science and Technology, Physics, Department of Physics and Astronomy, Nuclear Physics.
    Kamys, B.
    Jagiellonian Univ, Inst Phys, Ulica Prof Stanislawa Lojasiewicza 11, PL-30348 Krakow, Poland.
    Kemmerling, G.
    Forschungszentrum Julich, Julich Ctr Neutron Sci, D-52425 Julich, Germany;Forschungszentrum Julich, Zent Inst Engn Elektron & Analyt, D-52425 Julich, Germany.
    Khoukaz, A.
    Westfalische Wilhelms Univ Munster, Inst Kernphys, Wilhelm Klemm Str 9, D-48149 Munster, Germany.
    Khreptak, O.
    Jagiellonian Univ, Inst Phys, Ulica Prof Stanislawa Lojasiewicza 11, PL-30348 Krakow, Poland.
    Kirillov, D. A.
    Joint Inst Nucl Phys, Veksler & Baldin Lab High Energiy Phys, 6 Joliot Curie, Dubna 141980, Russia.
    Kistryn, S.
    Jagiellonian Univ, Inst Phys, Ulica Prof Stanislawa Lojasiewicza 11, PL-30348 Krakow, Poland.
    Kleines, H.
    Forschungszentrum Julich, Zent Inst Engn Elektron & Analyt, D-52425 Julich, Germany.
    Klos, B.
    Univ Silesia, August Chelkowski Inst Phys, Ulica 75 Pulku Piechoty 1, PL-41500 Chorzow, Poland.
    Krzemien, W.
    Natl Ctr Nucl Res, Div High Energy Phys, Ulica Hoza 69, PL-00681 Warsaw, Poland.
    Kulessa, P.
    Polish Acad Sci, Henryk Niewodniczanski Inst Nucl Phys, Ulica Radzikowskiego 152, PL-31342 Krakow, Poland.
    Kupsc, Andrzej
    Uppsala University, Disciplinary Domain of Science and Technology, Physics, Department of Physics and Astronomy, Nuclear Physics. Natl Ctr Nucl Res, Div High Energy Phys, Ulica Hoza 69, PL-00681 Warsaw, Poland.
    Lalwani, K.
    Malaviya Natl Inst Technol Jaipur, Dept Phys, JLN Marg, Jaipur 302017, Rajasthan, India.
    Lersch, D.
    Forschungszentrum Julich, Inst Kernphys, D-52425 Julich, Germany;Florida State Univ, Dept Phys, 77 Chieftan Way, Tallahassee, FL 32306 USA.
    Lorentz, B.
    Forschungszentrum Julich, Inst Kernphys, D-52425 Julich, Germany.
    Magiera, A.
    Jagiellonian Univ, Inst Phys, Ulica Prof Stanislawa Lojasiewicza 11, PL-30348 Krakow, Poland.
    Maier, R.
    Forschungszentrum Julich, JARA FAME, Julich Aachen Res Alliance, D-52425 Julich, Germany;Forschungszentrum Julich, Inst Kernphys, D-52425 Julich, Germany;Rhein Westfal TH Aachen, D-52056 Aachen, Germany.
    Marciniewski, Pawel
    Uppsala University, Disciplinary Domain of Science and Technology, Physics, Department of Physics and Astronomy, Nuclear Physics.
    Marianski, B.
    Natl Ctr Nucl Res, Div Nucl Phys, Ulica Hoza 69, PL-00681 Warsaw, Poland.
    Morsch, H. P.
    Natl Ctr Nucl Res, Div Nucl Phys, Ulica Hoza 69, PL-00681 Warsaw, Poland.
    Moskal, P.
    Jagiellonian Univ, Inst Phys, Ulica Prof Stanislawa Lojasiewicza 11, PL-30348 Krakow, Poland.
    Ohm, H.
    Forschungszentrum Julich, Inst Kernphys, D-52425 Julich, Germany.
    Parol, W.
    Polish Acad Sci, Henryk Niewodniczanski Inst Nucl Phys, Ulica Radzikowskiego 152, PL-31342 Krakow, Poland.
    del Rio, E. Perez
    Ist Nazl Fis Nucl, Lab Nazl Frascati, Via Enrico Fermi 40, I-00044 Rome, Italy;Eberhard Karls Univ Tubingen, Phys Inst, Morgenstelle 14, D-72076 Tubingen, Germany;Univ Tubingen, Phys Inst, Kepler Ctr Astro & Particle Phys, Morgenstelle 14, D-72076 Tubingen, Germany.
    Piskunov, N. M.
    Joint Inst Nucl Phys, Veksler & Baldin Lab High Energiy Phys, 6 Joliot Curie, Dubna 141980, Russia.
    Prasuhn, D.
    Forschungszentrum Julich, Inst Kernphys, D-52425 Julich, Germany.
    Pszczel, Damian
    Uppsala University, Disciplinary Domain of Science and Technology, Physics, Department of Physics and Astronomy, Nuclear Physics. Natl Ctr Nucl Res, Div High Energy Phys, Ulica Hoza 69, PL-00681 Warsaw, Poland.
    Pysz, K.
    Polish Acad Sci, Henryk Niewodniczanski Inst Nucl Phys, Ulica Radzikowskiego 152, PL-31342 Krakow, Poland.
    Ritman, J.
    Forschungszentrum Julich, JARA FAME, Julich Aachen Res Alliance, D-52425 Julich, Germany;Forschungszentrum Julich, Inst Kernphys, D-52425 Julich, Germany;Rhein Westfal TH Aachen, D-52056 Aachen, Germany;Ruhr Univ Bochum, Inst Expt Phys 1, Univ Str 150, D-44780 Bochum, Germany.
    Roy, A.
    Indian Inst Technol Indore, Discipline Phys, Khandwa Rd, Indore 453552, Madhya Pradesh, India.
    Rudy, Z.
    Jagiellonian Univ, Inst Phys, Ulica Prof Stanislawa Lojasiewicza 11, PL-30348 Krakow, Poland.
    Rundel, O.
    Jagiellonian Univ, Inst Phys, Ulica Prof Stanislawa Lojasiewicza 11, PL-30348 Krakow, Poland.
    Sawant, S.
    Indian Inst Technol, Dept Phys, Bombay 400076, Maharashtra, India.
    Schadmand, S.
    Forschungszentrum Julich, Inst Kernphys, D-52425 Julich, Germany.
    Schatti-Ozerianska, I.
    Jagiellonian Univ, Inst Phys, Ulica Prof Stanislawa Lojasiewicza 11, PL-30348 Krakow, Poland.
    Sefzick, T.
    Forschungszentrum Julich, Inst Kernphys, D-52425 Julich, Germany.
    Serdyuk, V.
    Forschungszentrum Julich, Inst Kernphys, D-52425 Julich, Germany.
    Shwartz, B.
    Novosibirsk State Univ, 2 Pirogova Ulitsa, Novosibirsk 630090, Russia;Budker Inst Nucl Phys SB RAS, 11 Akad Lavrentieva Prospekt, Novosibirsk 630090, Russia.
    Skorodko, T.
    Tomsk State Univ, Dept Phys, 36 Lenin Ave, Tomsk 634050, Russia;Eberhard Karls Univ Tubingen, Phys Inst, Morgenstelle 14, D-72076 Tubingen, Germany;Univ Tubingen, Phys Inst, Kepler Ctr Astro & Particle Phys, Morgenstelle 14, D-72076 Tubingen, Germany.
    Skurzok, M.
    Jagiellonian Univ, Inst Phys, Ulica Prof Stanislawa Lojasiewicza 11, PL-30348 Krakow, Poland.
    Smyrski, J.
    Jagiellonian Univ, Inst Phys, Ulica Prof Stanislawa Lojasiewicza 11, PL-30348 Krakow, Poland.
    Sopov, V.
    Natl Res Ctr Kurchatov Inst, Inst Theoret & Expt Phys, 25 Bolshaya Cheremushkinskaya Ulitsa, Moscow 117218, Russia.
    Stassen, R.
    Forschungszentrum Julich, Inst Kernphys, D-52425 Julich, Germany.
    Stepaniak, J.
    Natl Ctr Nucl Res, Div High Energy Phys, Ulica Hoza 69, PL-00681 Warsaw, Poland.
    Stephan, E.
    Univ Silesia, August Chelkowski Inst Phys, Ulica 75 Pulku Piechoty 1, PL-41500 Chorzow, Poland.
    Sterzenbach, G.
    Forschungszentrum Julich, Inst Kernphys, D-52425 Julich, Germany.
    Stockhorst, H.
    Forschungszentrum Julich, Inst Kernphys, D-52425 Julich, Germany.
    Stroeher, H.
    Forschungszentrum Julich, JARA FAME, Julich Aachen Res Alliance, D-52425 Julich, Germany;Forschungszentrum Julich, Inst Kernphys, D-52425 Julich, Germany;Rhein Westfal TH Aachen, D-52056 Aachen, Germany.
    Szczurek, A.
    Polish Acad Sci, Henryk Niewodniczanski Inst Nucl Phys, Ulica Radzikowskiego 152, PL-31342 Krakow, Poland.
    Trzcinski, A.
    Natl Ctr Nucl Res, Div Nucl Phys, Ulica Hoza 69, PL-00681 Warsaw, Poland.
    Wolke, Magnus
    Uppsala University, Disciplinary Domain of Science and Technology, Physics, Department of Physics and Astronomy, Nuclear Physics.
    Wronska, A.
    Jagiellonian Univ, Inst Phys, Ulica Prof Stanislawa Lojasiewicza 11, PL-30348 Krakow, Poland.
    Wuestner, P.
    Forschungszentrum Julich, Zent Inst Engn Elektron & Analyt, D-52425 Julich, Germany.
    Yamamoto, A.
    High Energy Accelerator Res Org KEK, Tsukuba, Ibaraki 3050801, Japan.
    Zabierowski, J.
    Natl Ctr Nucl Res, Astrophys Div, Box 447, PL-90950 Lodz, Poland.
    Zielinski, M. J.
    Jagiellonian Univ, Inst Phys, Ulica Prof Stanislawa Lojasiewicza 11, PL-30348 Krakow, Poland.
    Zlomanczuk, Jozef
    Uppsala University, Disciplinary Domain of Science and Technology, Physics, Department of Physics and Astronomy, Nuclear Physics.
    Zupranski, P.
    Natl Ctr Nucl Res, Div Nucl Phys, Ulica Hoza 69, PL-00681 Warsaw, Poland.
    Zurek, M.
    Forschungszentrum Julich, Inst Kernphys, D-52425 Julich, Germany.
    Isotensor Dibaryon in the pp -> pp pi(+)pi(-) Reaction?2018In: Physical Review Letters, ISSN 0031-9007, E-ISSN 1079-7114, Vol. 121, no 5, article id 052001Article in journal (Refereed)
    Abstract [en]

    Exclusive measurements of the quasifree pp -> pp pi(+)pi(-) reaction have been carried out at WASA@ COSY by means of pd collisions at T-p = 1.2 GeV. Total and differential cross sections have been extracted covering the energy region T-p = 1.08-1.36 GeV, which is the region of N* (1440) and Delta(123)Delta(1232) resonance excitations. Calculations describing these excitations by t-channel meson exchange are at variance with the measured differential cross sections and underpredict substantially the experimental total cross section. An isotensor Delta N dibaryon resonance with I(J(P)) = 2(1(+)) produced associatedly with a pion is able to overcome these deficiencies.

  • 225.
    Adlarson, Patrik
    et al.
    Uppsala University, Disciplinary Domain of Science and Technology, Physics, Department of Physics and Astronomy, Nuclear Physics.
    Augustyniak, W.
    Natl Ctr Nucl Res, Dept Nucl Phys, Ul Hoza 69, PL-00681 Warsaw, Poland.
    Bardan, W.
    Jagiellonian Univ, Inst Phys, Prof Stanislawa Lojasiewicza 11, PL-30348 Krakow, Poland.
    Bashkanov, M.
    Univ Edinburgh, Sch Phys & Astron, James Clerk Maxwell Bldg,Peter Guthrie Tait Rd, Edinburgh EH9 3FD, Midlothian, Scotland.
    Bergmann, F. S.
    Westfal Wilhelms Univ Munster, Inst Kernphys, Wilhelm Klemm Str 9, D-48149 Munster, Germany.
    Berlowski, M.
    Natl Ctr Nucl Res, High Energy Phys Dept, Ul Hoza 69, PL-00681 Warsaw, Poland.
    Bondar, A.
    SB RAS, Budker Inst Nucl Phys, 11 Akad Lavrentieva Prospect, Novosibirsk 630090, Russia;Novosibirsk State Univ, 2 Pirogova Str, Novosibirsk 630090, Russia.
    Buescher, M.
    Heinrich Heine Univ Dusseldorf, Inst Laser & Plasmaphys, Univ Str 1, D-40225 Dusseldorf, Germany;Forschungszentrum Julich, Peter Grunberg Inst, PGI Elekt Eigenschaften 6, D-52425 Julich, Germany.
    Calén, Hans
    Uppsala University, Disciplinary Domain of Science and Technology, Physics, Department of Physics and Astronomy, Nuclear Physics.
    Ciepal, I.
    Polish Acad Sci, Henryk Niewodniczanski Inst Nucl Phys, Radzikowskiego 152, PL-31342 Krakow, Poland.
    Clement, H.
    Univ Tubingen, Phys Inst, Kepler Ctr Astro & Teilchenphys, Morgenstelle 14, D-72076 Tubingen, Germany;Eberhard Karls Univ Tubingen, Phys Inst, Morgenstelle 14, D-72076 Tubingen, Germany.
    Czerwinski, E.
    Jagiellonian Univ, Inst Phys, Prof Stanislawa Lojasiewicza 11, PL-30348 Krakow, Poland.
    Demmich, K.
    Westfal Wilhelms Univ Munster, Inst Kernphys, Wilhelm Klemm Str 9, D-48149 Munster, Germany.
    Engels, R.
    Forschungszentrum Julich, Inst Kernphys, D-52425 Julich, Germany.
    Erveno, A.
    Forschungszentrum Julich, Zent Inst Engn Elekt & Analyt, D-52425 Julich, Germany.
    Erven, W.
    Forschungszentrum Julich, Zent Inst Engn Elekt & Analyt, D-52425 Julich, Germany.
    Eyrich, W.
    Friedrich Alexander Univ Erlangen Nurnberg, Phys Inst, Erwin Rommel Str 1, D-91058 Erlangen, Germany.
    Fedorets, P.
    Forschungszentrum Julich, Inst Kernphys, D-52425 Julich, Germany;Kurchatov Inst, Natl Res Ctr, Inst Theoret & Expt Phys, 25 Bolshaya Cheremushkinskaya, Moscow 117218, Russia.
    Foehl, K.
    Kurchatov Inst, Natl Res Ctr, Petersburg Nucl Phys Inst, High Energy Phys Div, 1 Mkr Orlova Roshcha, Gatchina 188300, Leningradskaya, Russia;Justus Liebig Univ Giessen, Phys Inst 2, Heinrich Buff Ring 16, D-35392 Giessen, Germany.
    Fransson, Kjell
    Uppsala University, Disciplinary Domain of Science and Technology, Physics, Department of Physics and Astronomy, Nuclear Physics.
    Goldenbaum, F.
    Forschungszentrum Julich, Inst Kernphys, D-52425 Julich, Germany.
    Goswami, A.
    Indian Inst Technol Indore, Dept Phys, Khandwa Rd, Indore 453552, Madhya Pradesh, India;Forschungszentrum Julich, Inst Kernphys, D-52425 Julich, Germany.
    Grigoryev, K.
    Forschungszentrum Julich, Inst Kernphys, D-52425 Julich, Germany.
    Gullstrom, C. -O
    Heijkenskjöld, Lena
    Uppsala University, Disciplinary Domain of Science and Technology, Physics, Department of Physics and Astronomy, Nuclear Physics. Johannes Gutenberg Univ Mainz, Inst Kernphys, Johann Joachim Becher Weg 45, D-55128 Mainz, Germany.
    Hejny, V.
    Forschungszentrum Julich, Inst Kernphys, D-52425 Julich, Germany.
    Huesken, N.
    Westfal Wilhelms Univ Munster, Inst Kernphys, Wilhelm Klemm Str 9, D-48149 Munster, Germany.
    Jarczyk, L.
    Jagiellonian Univ, Inst Phys, Prof Stanislawa Lojasiewicza 11, PL-30348 Krakow, Poland.
    Johansson, Tord
    Uppsala University, Disciplinary Domain of Science and Technology, Physics, Department of Physics and Astronomy, Nuclear Physics.
    Kamys, B.
    Jagiellonian Univ, Inst Phys, Prof Stanislawa Lojasiewicza 11, PL-30348 Krakow, Poland.
    Kemmerling, G.
    Forschungszentrum Julich, Julich Ctr Neutron Sci JCNS, D-52425 Julich, Germany;Forschungszentrum Julich, Zent Inst Engn Elekt & Analyt, D-52425 Julich, Germany.
    Khatri, G.
    Jagiellonian Univ, Inst Phys, Prof Stanislawa Lojasiewicza 11, PL-30348 Krakow, Poland;Harvard Univ, Dept Phys, 17 Oxford St, Cambridge, MA 02138 USA.
    Khoukaz, A.
    Westfal Wilhelms Univ Munster, Inst Kernphys, Wilhelm Klemm Str 9, D-48149 Munster, Germany.
    Khreptak, A.
    Jagiellonian Univ, Inst Phys, Prof Stanislawa Lojasiewicza 11, PL-30348 Krakow, Poland.
    Kirillov, D. A.
    Joint Inst Nucl Res, Veksler & Baldin Lab High Energiy Phys, 6 Joliot Curie, Dubna 141980, Russia.
    Kistryn, S.
    Jagiellonian Univ, Inst Phys, Prof Stanislawa Lojasiewicza 11, PL-30348 Krakow, Poland.
    Kleines, H.
    Forschungszentrum Julich, Julich Ctr Neutron Sci JCNS, D-52425 Julich, Germany;Forschungszentrum Julich, Zent Inst Engn Elekt & Analyt, D-52425 Julich, Germany.
    Klos, B.
    Univ Silesia, August Chelkowski Inst Phys, Uniwersytecka 4, PL-40007 Katowice, Poland.
    Krzemien, W.
    Natl Ctr Nucl Res, High Energy Phys Dept, Ul Hoza 69, PL-00681 Warsaw, Poland.
    Kulessa, P.
    Polish Acad Sci, Henryk Niewodniczanski Inst Nucl Phys, Radzikowskiego 152, PL-31342 Krakow, Poland.
    Kupsc, Andrzej
    Uppsala University, Disciplinary Domain of Science and Technology, Physics, Department of Physics and Astronomy, Nuclear Physics. Natl Ctr Nucl Res, High Energy Phys Dept, Ul Hoza 69, PL-00681 Warsaw, Poland.
    Kuzmin, A.
    SB RAS, Budker Inst Nucl Phys, 11 Akad Lavrentieva Prospect, Novosibirsk 630090, Russia;Novosibirsk State Univ, 2 Pirogova Str, Novosibirsk 630090, Russia.
    Lalwani, K.
    Malaviya Natl Inst Technol Jaipur, Dept Phys, JLN Marg, Jaipur 302017, Rajasthan, India.
    Lersch, D.
    Forschungszentrum Julich, Inst Kernphys, D-52425 Julich, Germany.
    Lorentz, B.
    Forschungszentrum Julich, Inst Kernphys, D-52425 Julich, Germany.
    Magiera, A.
    Jagiellonian Univ, Inst Phys, Prof Stanislawa Lojasiewicza 11, PL-30348 Krakow, Poland.
    Maier, R.
    Forschungszentrum Julich, Julich Aachen Res Alliance, JARA FAME, D-52425 Julich, Germany;Forschungszentrum Julich, Inst Kernphys, D-52425 Julich, Germany;Rhein Westfal TH Aachen, D-52056 Aachen, Germany.
    Marciniewski, Pawel
    Uppsala University, Disciplinary Domain of Science and Technology, Physics, Department of Physics and Astronomy, Nuclear Physics.
    Marianski, B.
    Natl Ctr Nucl Res, Dept Nucl Phys, Ul Hoza 69, PL-00681 Warsaw, Poland.
    Morsch, H. -P
    Moskal, P.
    Jagiellonian Univ, Inst Phys, Prof Stanislawa Lojasiewicza 11, PL-30348 Krakow, Poland.
    Ohm, H.
    Forschungszentrum Julich, Inst Kernphys, D-52425 Julich, Germany.
    Parol, W.
    Polish Acad Sci, Henryk Niewodniczanski Inst Nucl Phys, Radzikowskiego 152, PL-31342 Krakow, Poland.
    del Rio, E. Perez
    Univ Tubingen, Phys Inst, Kepler Ctr Astro & Teilchenphys, Morgenstelle 14, D-72076 Tubingen, Germany;INFN, Lab Nazl Frascati, Via E Fermi 40, I-00044 Rome, Italy;Eberhard Karls Univ Tubingen, Phys Inst, Morgenstelle 14, D-72076 Tubingen, Germany.
    Piskunovu, N. M.
    Joint Inst Nucl Res, Veksler & Baldin Lab High Energiy Phys, 6 Joliot Curie, Dubna 141980, Russia.
    Prasuhn, D.
    Forschungszentrum Julich, Inst Kernphys, D-52425 Julich, Germany.
    Pszczel, Damian
    Uppsala University, Disciplinary Domain of Science and Technology, Physics, Department of Physics and Astronomy, Nuclear Physics. Natl Ctr Nucl Res, High Energy Phys Dept, Ul Hoza 69, PL-00681 Warsaw, Poland.
    Pysz, K.
    Polish Acad Sci, Henryk Niewodniczanski Inst Nucl Phys, Radzikowskiego 152, PL-31342 Krakow, Poland.
    Pyszniak, Andzej
    Uppsala University, Disciplinary Domain of Science and Technology, Physics, Department of Physics and Astronomy, Nuclear Physics. Jagiellonian Univ, Inst Phys, Prof Stanislawa Lojasiewicza 11, PL-30348 Krakow, Poland.
    Ritman, J.
    Forschungszentrum Julich, Julich Aachen Res Alliance, JARA FAME, D-52425 Julich, Germany;Ruhr Univ Bochum, Inst Expt Phys, Univ Str 150, D-44780 Bochum, Germany;Forschungszentrum Julich, Inst Kernphys, D-52425 Julich, Germany;Rhein Westfal TH Aachen, D-52056 Aachen, Germany.
    Roy, A.
    Indian Inst Technol Indore, Dept Phys, Khandwa Rd, Indore 453552, Madhya Pradesh, India.
    Rudy, Z.
    Jagiellonian Univ, Inst Phys, Prof Stanislawa Lojasiewicza 11, PL-30348 Krakow, Poland.
    Rundel, O.
    Jagiellonian Univ, Inst Phys, Prof Stanislawa Lojasiewicza 11, PL-30348 Krakow, Poland.
    Sawant, S.
    Indian Inst Technol, Dept Phys, Bombay 400076, Maharashtra, India.
    Schadmand, S.
    Forschungszentrum Julich, Inst Kernphys, D-52425 Julich, Germany.
    Schatti-Ozerianska, I.
    Jagiellonian Univ, Inst Phys, Prof Stanislawa Lojasiewicza 11, PL-30348 Krakow, Poland.
    Sefzick, T.
    Forschungszentrum Julich, Inst Kernphys, D-52425 Julich, Germany.
    Serdyuk, V.
    Forschungszentrum Julich, Inst Kernphys, D-52425 Julich, Germany.
    Shwartz, B.
    SB RAS, Budker Inst Nucl Phys, 11 Akad Lavrentieva Prospect, Novosibirsk 630090, Russia;Novosibirsk State Univ, 2 Pirogova Str, Novosibirsk 630090, Russia.
    Sitterberg, K.
    Westfal Wilhelms Univ Munster, Inst Kernphys, Wilhelm Klemm Str 9, D-48149 Munster, Germany.
    Skorodko, T.
    Univ Tubingen, Phys Inst, Kepler Ctr Astro & Teilchenphys, Morgenstelle 14, D-72076 Tubingen, Germany;Tomsk State Univ, Dept Phys, 36 Lenina Ave, Tomsk 634050, Russia;Eberhard Karls Univ Tubingen, Phys Inst, Morgenstelle 14, D-72076 Tubingen, Germany.
    Skurzok, M.
    Jagiellonian Univ, Inst Phys, Prof Stanislawa Lojasiewicza 11, PL-30348 Krakow, Poland.
    Smyrski, J.
    Jagiellonian Univ, Inst Phys, Prof Stanislawa Lojasiewicza 11, PL-30348 Krakow, Poland.
    Sopov, V.
    Kurchatov Inst, Natl Res Ctr, Inst Theoret & Expt Phys, 25 Bolshaya Cheremushkinskaya, Moscow 117218, Russia.
    Stassen, R.
    Forschungszentrum Julich, Inst Kernphys, D-52425 Julich, Germany.
    Stepaniak, J.
    Natl Ctr Nucl Res, High Energy Phys Dept, Ul Hoza 69, PL-00681 Warsaw, Poland.
    Stephan, E.
    Univ Silesia, August Chelkowski Inst Phys, Uniwersytecka 4, PL-40007 Katowice, Poland.
    Sterzenbach, G.
    Forschungszentrum Julich, Inst Kernphys, D-52425 Julich, Germany.
    Stockhorst, H.
    Forschungszentrum Julich, Inst Kernphys, D-52425 Julich, Germany.
    Stroeher, H.
    Forschungszentrum Julich, Julich Aachen Res Alliance, JARA FAME, D-52425 Julich, Germany;Forschungszentrum Julich, Inst Kernphys, D-52425 Julich, Germany;Rhein Westfal TH Aachen, D-52056 Aachen, Germany.
    Szczurek, A.
    Polish Acad Sci, Henryk Niewodniczanski Inst Nucl Phys, Radzikowskiego 152, PL-31342 Krakow, Poland.
    Trzcinski, A.
    Natl Ctr Nucl Res, Dept Nucl Phys, Ul Hoza 69, PL-00681 Warsaw, Poland.
    Wolke, Magnus
    Uppsala University, Disciplinary Domain of Science and Technology, Physics, Department of Physics and Astronomy, Nuclear Physics.
    Wronska, A.
    Jagiellonian Univ, Inst Phys, Prof Stanislawa Lojasiewicza 11, PL-30348 Krakow, Poland.
    Wuestner, P.
    Forschungszentrum Julich, Zent Inst Engn Elekt & Analyt, D-52425 Julich, Germany.
    Yamamoto, A.
    High Energy Accelerator Res Org KEK, Tsukuba, Ibaraki 3050801, Japan.
    Zabierowski, J.
    Natl Ctr Nucl Res, Astrophys Div, Box 447, PL-90950 Lodz, Poland.
    Zielinski, M. J.
    Jagiellonian Univ, Inst Phys, Prof Stanislawa Lojasiewicza 11, PL-30348 Krakow, Poland.
    Zlomanczuk, Jozef
    Uppsala University, Disciplinary Domain of Science and Technology, Physics, Department of Physics and Astronomy, Nuclear Physics.
    Zupranski, P.
    Natl Ctr Nucl Res, Dept Nucl Phys, Ul Hoza 69, PL-00681 Warsaw, Poland.
    Zurek, M.
    Forschungszentrum Julich, Inst Kernphys, D-52425 Julich, Germany.
    Wilkin, C.
    UCL, Phys & Astron Dept, Gower St, London WC1E 6BT, England.
    Total and differential cross sections of η-production in proton–deuteron fusion for excess energies between Qη = 13 MeV and Qη = 81 MeV2018In: Physics Letters B, ISSN 0370-2693, E-ISSN 1873-2445, Vol. 782, p. 297-304Article in journal (Refereed)
    Abstract [en]

    New data on both total and differential cross sections of the production of eta mesons in proton-deuteron fusion to He-3 eta in the excess energy region 13.6 MeV <= Q(eta) <= 80.9 MeV are presented. These data have been obtained with the WASA-at-COSY detector setup located at the Forschungszentrum Julich, using a proton beam at 15 different beam momenta between p(p) = 1.60 GeV/c and p(p) = 1.74 GeV/c. While significant structure of the total cross section is observed in the energy region 20 MeV less than or similar to Q(eta) less than or similar to 60 MeV, a previously reported sharp variation around Q(eta) approximate to 50 MeV cannot be confirmed. Angular distributions show the typical forward- peaking that was noted earlier. For the first time, it is possible to study the development of these angular distributions with rising excess energy over a wide interval.

  • 226.
    Adlarson, Patrik
    et al.
    Uppsala University, Disciplinary Domain of Science and Technology, Physics, Department of Physics and Astronomy, Nuclear Physics.
    Collaboration, WASA-at-COSY
    Augustyniak, W.
    Natl Ctr Nucl Res, Dept Nucl Phys, Ul Hoza 69, PL-00681 Warsaw, Poland.
    Bardan, W.
    Jagiellonian Univ, Inst Phys, Prof Stanislawa Lojasiewicza 11, PL-30348 Krakow, Poland.
    Bashkanov, M.
    Univ Edinburgh, Sch Phys & Astron, James Clerk Maxwell Bldg,Peter Guthrie Tait Rd, Edinburgh EH9 3FD, Scotland.
    Bergmann, F. S.
    Westfalische Wilhelms Univ Munster, Inst Kernphys, Wilhelm Klemm Str 9, D-48149 Munster, Germany.
    Berlowski, M.
    Natl Ctr Nucl Res, High Energy Phys Dept, Ul Hoza 69, PL-00681 Warsaw, Poland.
    Bondar, A.
    RAS, SB, Budker Inst Nucl Phys, 11 Akad Lavrentieva Prospect, Novosibirsk 630090, Russia;Novosibirsk State Univ, 2 Pirogova Str, Novosibirsk 630090, Russia.
    Buescher, M.
    Forschungszentrum Julich, Elekt Eigenschaften PGI 6, Peter Grunberg Inst, D-52425 Julich, Germany;Heinrich Heine Univ Dusseldorf, Inst Laser & Plasmaphys, Univ Str 1, D-40225 Dusseldorf, Germany.
    Calén, Hans
    Uppsala University, Disciplinary Domain of Science and Technology, Physics, Department of Physics and Astronomy, Nuclear Physics.
    Ciepal, I.
    Polish Acad Sci, Henryk Niewodniczariski Inst Nucl Phys, PL-31342 Krakow, Poland.
    Clement, H.
    Eberhard Karls Univ Tubingen, Phys Inst, Morgenstelle 14, D-72076 Tubingen, Germany;Univ Tubingen, Phys Inst, Kepler Ctr Astro & Teilchenphys, Morgenstelle 14, D-72076 Tubingen, Germany.
    Czerwinski, E.
    Jagiellonian Univ, Inst Phys, Prof Stanislawa Lojasiewicza 11, PL-30348 Krakow, Poland.
    Demmich, K.
    Westfalische Wilhelms Univ Munster, Inst Kernphys, Wilhelm Klemm Str 9, D-48149 Munster, Germany.
    Engels, R.
    Forschungszentrum Julich, Inst Kernphys, D-52425 Julich, Germany.
    Erven, A.
    Forschungszentrum Julich, Zentralinst Engn Elekt & Anal, D-52425 Julich, Germany.
    Erven, W.
    Forschungszentrum Julich, Zentralinst Engn Elekt & Anal, D-52425 Julich, Germany.
    Eyrich, W.
    Friedrich Alexander Univ Erlangen Nurnberg, Phys Inst, Erwin Rommel Str 1, D-91058 Erlangen, Germany.
    Fedorets, R.
    Forschungszentrum Julich, Inst Kernphys, D-52425 Julich, Germany;Kurchatov Inst, Natl Res Ctr, Inst Theoret & Expt Phys, 25 Bolshaya Cheremushkinskaya, Moscow 117218, Russia.
    Foehl, K.
    Justus Liebig Univ Giessen, Phys Inst 2, Heinrich Buff Ring 16, D-35392 Giessen, Germany.
    Fransson, Kjell
    Uppsala University, Disciplinary Domain of Science and Technology, Physics, Department of Physics and Astronomy, Nuclear Physics.
    Goldenbaum, F.
    Forschungszentrum Julich, Inst Kernphys, D-52425 Julich, Germany.
    Goswami, A.
    Forschungszentrum Julich, Inst Kernphys, D-52425 Julich, Germany;Indian Inst Technol Indore, Dept Phys, Khandwa Rd, Indore 453552, Madhya Pradesh, India.
    Grigoryev, K.
    Forschungszentrum Julich, Inst Kernphys, D-52425 Julich, Germany;Kurchatov Inst, Natl Res Ctr, Petersburg Nucl Phys Inst, High Energy Phys Div, 1 Mkr Orlova Roshcha, Gatchina 188300, Leningradskaya, Russia.
    Gullström, Carl-Oskar
    Uppsala University, Disciplinary Domain of Science and Technology, Physics, Department of Physics and Astronomy, Nuclear Physics.
    Heijkenskjöld, Lena
    Uppsala University, Disciplinary Domain of Science and Technology, Physics, Department of Physics and Astronomy, Nuclear Physics. Johannes Gutenberg Univ Mainz, Inst Kernphys, Johann Joachim Becher Weg 45, D-55128 Mainz, Germany.
    Hejny, V.
    Forschungszentrum Julich, Inst Kernphys, D-52425 Julich, Germany.
    Huesken, N.
    Westfalische Wilhelms Univ Munster, Inst Kernphys, Wilhelm Klemm Str 9, D-48149 Munster, Germany.
    Jarczyk, L.
    Jagiellonian Univ, Inst Phys, Prof Stanislawa Lojasiewicza 11, PL-30348 Krakow, Poland.
    Johansson, Tord
    Uppsala University, Disciplinary Domain of Science and Technology, Physics, Department of Physics and Astronomy, Nuclear Physics.
    Kamys, B.
    Jagiellonian Univ, Inst Phys, Prof Stanislawa Lojasiewicza 11, PL-30348 Krakow, Poland.
    Kemmerling, G.
    Forschungszentrum Julich, Zentralinst Engn Elekt & Anal, D-52425 Julich, Germany;Forschungszentrum Julich, JCNS, D-52425 Julich, Germany.
    Khatri, G.
    Jagiellonian Univ, Inst Phys, Prof Stanislawa Lojasiewicza 11, PL-30348 Krakow, Poland;Harvard Univ, Dept Phys, 17 Oxford St, Cambridge, MA 02138 USA.
    Khoukaz, A.
    Westfalische Wilhelms Univ Munster, Inst Kernphys, Wilhelm Klemm Str 9, D-48149 Munster, Germany.
    Khreptak, A.
    Jagiellonian Univ, Inst Phys, Prof Stanislawa Lojasiewicza 11, PL-30348 Krakow, Poland.
    Kirillov, D. A.
    Joint Inst Nucl Phys, Veksler & Baldin Lab High Energy Phys, 6 Joliot Curie, Dubna 141980, Russia.
    Kistryn, S.
    Jagiellonian Univ, Inst Phys, Prof Stanislawa Lojasiewicza 11, PL-30348 Krakow, Poland.
    Kleines, H.
    Forschungszentrum Julich, Zentralinst Engn Elekt & Anal, D-52425 Julich, Germany;Forschungszentrum Julich, JCNS, D-52425 Julich, Germany.
    Klos, B.
    Univ Silesia, August Chelkowski Inst Phys, Uniwersytecka 4, PL-40007 Katowice, Poland.
    Krzemien, W.
    Natl Ctr Nucl Res, High Energy Phys Dept, Ul Hoza 69, PL-00681 Warsaw, Poland.
    Kulessa, R.
    Polish Acad Sci, Henryk Niewodniczariski Inst Nucl Phys, PL-31342 Krakow, Poland.
    Kupsc, Andrzej
    Uppsala University, Disciplinary Domain of Science and Technology, Physics, Department of Physics and Astronomy, Nuclear Physics. Natl Ctr Nucl Res, High Energy Phys Dept, Ul Hoza 69, PL-00681 Warsaw, Poland.
    Kuzmin, A.
    RAS, SB, Budker Inst Nucl Phys, 11 Akad Lavrentieva Prospect, Novosibirsk 630090, Russia;Novosibirsk State Univ, 2 Pirogova Str, Novosibirsk 630090, Russia.
    Lalwani, K.
    Malaviya Natl Inst Technol Jaipur, Dept Phys, Jln Marg Jaipur 302017, Rajasthan, India.
    Lersch, D.
    Forschungszentrum Julich, Inst Kernphys, D-52425 Julich, Germany.
    Lorentz, B.
    Forschungszentrum Julich, Inst Kernphys, D-52425 Julich, Germany.
    Magiera, A.
    Jagiellonian Univ, Inst Phys, Prof Stanislawa Lojasiewicza 11, PL-30348 Krakow, Poland.
    Maier, R.
    Forschungszentrum Julich, Inst Kernphys, D-52425 Julich, Germany;Forschungszentrum Julich, JARA, FAME, D-52425 Julich, Germany;Rhein Westfal TH Aachen, D-52056 Aachen, Germany.
    Marciniewski, Pawel
    Uppsala University, Disciplinary Domain of Science and Technology, Physics, Department of Physics and Astronomy, Nuclear Physics.
    Marianski, B.
    Natl Ctr Nucl Res, Dept Nucl Phys, Ul Hoza 69, PL-00681 Warsaw, Poland.
    Morsch, H. -P
    Natl Ctr Nucl Res, Dept Nucl Phys, Ul Hoza 69, PL-00681 Warsaw, Poland.
    Moskal, R.
    Jagiellonian Univ, Inst Phys, Prof Stanislawa Lojasiewicza 11, PL-30348 Krakow, Poland.
    Ohm, H.
    Forschungszentrum Julich, Inst Kernphys, D-52425 Julich, Germany.
    Parol, W.
    Polish Acad Sci, Henryk Niewodniczariski Inst Nucl Phys, PL-31342 Krakow, Poland.
    del Rio, E. Perez
    Eberhard Karls Univ Tubingen, Phys Inst, Morgenstelle 14, D-72076 Tubingen, Germany;Univ Tubingen, Phys Inst, Kepler Ctr Astro & Teilchenphys, Morgenstelle 14, D-72076 Tubingen, Germany;INFN, Lab Nazl Frascati, Via E Fermi 40, I-00044 Rome, Italy.
    Piskunov, N. M.
    Joint Inst Nucl Phys, Veksler & Baldin Lab High Energy Phys, 6 Joliot Curie, Dubna 141980, Russia.
    Prasuhn, D.
    Forschungszentrum Julich, Inst Kernphys, D-52425 Julich, Germany.
    Pszczel, Damian
    Uppsala University, Disciplinary Domain of Science and Technology, Physics, Department of Physics and Astronomy, Nuclear Physics. Natl Ctr Nucl Res, High Energy Phys Dept, Ul Hoza 69, PL-00681 Warsaw, Poland.
    Pysz, K.
    Polish Acad Sci, Henryk Niewodniczariski Inst Nucl Phys, PL-31342 Krakow, Poland.
    Pyszniak, Andzej
    Uppsala University, Disciplinary Domain of Science and Technology, Physics, Department of Physics and Astronomy, Nuclear Physics. Jagiellonian Univ, Inst Phys, Prof Stanislawa Lojasiewicza 11, PL-30348 Krakow, Poland.
    Ritman, J.
    Forschungszentrum Julich, Inst Kernphys, D-52425 Julich, Germany;Forschungszentrum Julich, JARA, FAME, D-52425 Julich, Germany;Rhein Westfal TH Aachen, D-52056 Aachen, Germany;Ruhr Univ Bochum, Inst Expt Phys 1, Univ Str 150, D-44780 Bochum, Germany.
    Roy, A.
    Indian Inst Technol Indore, Dept Phys, Khandwa Rd, Indore 453552, Madhya Pradesh, India.
    Rudy, Z.
    Jagiellonian Univ, Inst Phys, Prof Stanislawa Lojasiewicza 11, PL-30348 Krakow, Poland.
    Rundel, O.
    Jagiellonian Univ, Inst Phys, Prof Stanislawa Lojasiewicza 11, PL-30348 Krakow, Poland.
    Sawant, S.
    Indian Inst Technol, Dept Phys, Bombay 400076, Maharashtra, India.
    Schadmand, S.
    Forschungszentrum Julich, Inst Kernphys, D-52425 Julich, Germany.
    Schatti-Ozerianska, I.
    Jagiellonian Univ, Inst Phys, Prof Stanislawa Lojasiewicza 11, PL-30348 Krakow, Poland.
    Sefzick, T.
    Forschungszentrum Julich, Inst Kernphys, D-52425 Julich, Germany.
    Serdyuk, V.
    Forschungszentrum Julich, Inst Kernphys, D-52425 Julich, Germany.
    Shwartz, B.
    RAS, SB, Budker Inst Nucl Phys, 11 Akad Lavrentieva Prospect, Novosibirsk 630090, Russia;Novosibirsk State Univ, 2 Pirogova Str, Novosibirsk 630090, Russia.
    Sitterberg, K.
    Westfalische Wilhelms Univ Munster, Inst Kernphys, Wilhelm Klemm Str 9, D-48149 Munster, Germany.
    Skorodko, T.
    Eberhard Karls Univ Tubingen, Phys Inst, Morgenstelle 14, D-72076 Tubingen, Germany;Univ Tubingen, Phys Inst, Kepler Ctr Astro & Teilchenphys, Morgenstelle 14, D-72076 Tubingen, Germany;Tomsk State Univ, Dept Phys, 36 Lenina Ave, Tomsk 634050, Russia.
    Skurzok, M.
    Jagiellonian Univ, Inst Phys, Prof Stanislawa Lojasiewicza 11, PL-30348 Krakow, Poland.
    Smyrski, J.
    Jagiellonian Univ, Inst Phys, Prof Stanislawa Lojasiewicza 11, PL-30348 Krakow, Poland.
    Sopov, V.
    Kurchatov Inst, Natl Res Ctr, Inst Theoret & Expt Phys, 25 Bolshaya Cheremushkinskaya, Moscow 117218, Russia.
    Stassen, R.
    Forschungszentrum Julich, Inst Kernphys, D-52425 Julich, Germany.
    Stepaniak, J.
    Natl Ctr Nucl Res, High Energy Phys Dept, Ul Hoza 69, PL-00681 Warsaw, Poland.
    Stephan, E.
    Univ Silesia, August Chelkowski Inst Phys, Uniwersytecka 4, PL-40007 Katowice, Poland.
    Sterzenbach, G.
    Forschungszentrum Julich, Inst Kernphys, D-52425 Julich, Germany.
    Stockhorst, H.
    Forschungszentrum Julich, Inst Kernphys, D-52425 Julich, Germany.
    Stroeher, H.
    Forschungszentrum Julich, Inst Kernphys, D-52425 Julich, Germany;Forschungszentrum Julich, JARA, FAME, D-52425 Julich, Germany;Rhein Westfal TH Aachen, D-52056 Aachen, Germany.
    Szczurek, A.
    Polish Acad Sci, Henryk Niewodniczariski Inst Nucl Phys, PL-31342 Krakow, Poland.
    Trzcinski, A.
    Natl Ctr Nucl Res, Dept Nucl Phys, Ul Hoza 69, PL-00681 Warsaw, Poland.
    Wolke, Magnus
    Uppsala University, Disciplinary Domain of Science and Technology, Physics, Department of Physics and Astronomy, Nuclear Physics.
    Wronska, A.
    Jagiellonian Univ, Inst Phys, Prof Stanislawa Lojasiewicza 11, PL-30348 Krakow, Poland.
    Wuestner, R.
    Forschungszentrum Julich, Zentralinst Engn Elekt & Anal, D-52425 Julich, Germany.
    Yamamoto, A.
    High Energy Accelerator Org, KEK, Tsukuba, Ibaraki 3050801, Japan.
    Zabierowski, J.
    Natl Ctr Nucl Res, Astrophys Div, Box 447, PL-90950 Lodz, Poland.
    Zielinski, M. J.
    Jagiellonian Univ, Inst Phys, Prof Stanislawa Lojasiewicza 11, PL-30348 Krakow, Poland.
    Zlomanczuk, Jozef
    Uppsala University, Disciplinary Domain of Science and Technology, Physics, Department of Physics and Astronomy, Nuclear Physics.
    Zupranski, R.
    Natl Ctr Nucl Res, Dept Nucl Phys, Ul Hoza 69, PL-00681 Warsaw, Poland.
    Zurek, M.
    Forschungszentrum Julich, Inst Kernphys, D-52425 Julich, Germany.
    Wirzba, A.
    Forschungszentrum Julich, Inst Kernphys, D-52425 Julich, Germany;Forschungszentrum Julich, Inst Adv Simulat, D-52425 Julich, Germany;Forschungszentrum Julich, Julich Ctr Hadron Phys, D-52425 Julich, Germany.
    Search for C violation in the decay eta -> pi(0)e(+)e(-) with WASA-at-COSY2018In: Physics Letters B, ISSN 0370-2693, E-ISSN 1873-2445, Vol. 784, p. 378-384Article in journal (Refereed)
    Abstract [en]

    We report on the search for the rare decay eta -> pi(0)e(+)e(-) which is of interest to study C violation in the electromagnetic interaction which would indicate contributions from physics beyond the Standard Model, since the allowed decay via a two-photon intermediate state is strongly suppressed. The experiment has been performed using the WASA-at-COSY installation, located at the COSY accelerator of the Forschungszentrum Julich, Germany. In total 3 x 10(7) events of the reaction pd -> He-3 eta have been recorded at an excess energy of Q = 59.8MeV. Based on this data set the C parity violating decay eta -> pi(0)gamma* -> pi(0)e(+)e(-) via a single-photon intermediate state has been searched for, resulting in new upper limits of Gamma(eta -> pi(0)e(+) e(-))/Gamma(eta -> pi(+) pi(-) pi(0)) < 3.28 x 10(-5) and Gamma(eta -> pi(0)e(+) e(-))/Gamma(eta -> all)< 7.5 x 10(-6) (CL=90%), respectively. 

  • 227.
    Adlarsona, Patrik
    et al.
    Uppsala University, Disciplinary Domain of Science and Technology, Physics, Department of Physics and Astronomy, Nuclear Physics.
    Augustyniak, W.
    Bardan, W.
    Bashkanov, M.
    Bergmann, F. S.
    Berlowski, M.
    Bhatt, H.
    Bondar, A.
    Buescher, M.
    Calén, Hans
    Uppsala University, Disciplinary Domain of Science and Technology, Physics, Department of Physics and Astronomy, Nuclear Physics.
    Ciepal, I.
    Clement, H.
    Coderre, D.
    Czerwinski, E.
    Demmich, K.
    Doroshkevich, E.
    Engels, R.
    Erven, A.
    Erven, W.
    Eyrich, W.
    Fedorets, P.
    Foehl, K.
    Fransson, Kjell E. I.
    Uppsala University, Disciplinary Domain of Science and Technology, Physics, Department of Physics and Astronomy, Nuclear Physics.
    Goldenbaum, F.
    Goslawski, P.
    Goswami, A.
    Grigoryev, K.
    Gullström, Carl-Oscar
    Uppsala University, Disciplinary Domain of Science and Technology, Physics, Department of Physics and Astronomy, Nuclear Physics.
    Hauenstein, F.
    Heijkenskjöld, Lena
    Uppsala University, Disciplinary Domain of Science and Technology, Physics, Department of Physics and Astronomy, Nuclear Physics.
    Hejny, V.
    Höistad, Bo
    Uppsala University, Disciplinary Domain of Science and Technology, Physics, Department of Physics and Astronomy, Nuclear Physics.
    Huesken, N.
    Jarczyk, L.
    Johansson, Tord
    Uppsala University, Disciplinary Domain of Science and Technology, Physics, Department of Physics and Astronomy, Nuclear Physics.
    Kamys, B.
    Kemmerling, G.
    Khan, F. A.
    Khoukaz, A.
    Kirillov, D. A.
    Kistryn, S.
    Kleines, H.
    Klos, B.
    Krzemien, W.
    Kulessa, P.
    Kupsc, Andrzej
    Uppsala University, Disciplinary Domain of Science and Technology, Physics, Department of Physics and Astronomy, Nuclear Physics.
    Kuzmin, A.
    Lalwani, K.
    Lersch, D.
    Lorentz, B.
    Magiera, A.
    Maier, R.
    Marciniewski, Pawel
    Uppsala University, Disciplinary Domain of Science and Technology, Physics, Department of Physics and Astronomy, Nuclear Physics.
    Marianski, B.
    Mikirtychiants, M.
    Morsch, H. -P
    Moskal, P.
    Ohm, H.
    Ozerianska, I.
    del Rio, E. Perez
    Piskunov, N. M.
    Podkopal, P.
    Prasuhn, D.
    Pricking, A.
    Pszczel, Damian
    Uppsala University, Disciplinary Domain of Science and Technology, Physics, Department of Physics and Astronomy, Nuclear Physics.
    Pysz, K.
    Pyszniak, Andrzej
    Uppsala University, Disciplinary Domain of Science and Technology, Physics, Department of Physics and Astronomy, Nuclear Physics.
    Ritman, J.
    Roy, A.
    Rudy, Z.
    Sawant, S.
    Schadmand, S.
    Sefzick, T.
    Serdyuk, V.
    Shwartz, B.
    Siudak, R.
    Skorodko, T.
    Skurzok, M.
    Smyrski, J.
    Sopov, V.
    Stassen, R.
    Stepaniak, J.
    Stephan, E.
    Sterzenbach, G.
    Stockhorst, H.
    Stroeher, H.
    Szczurek, A.
    Taeschner, A.
    Trzcinski, A.
    Varma, R.
    Wagner, G. J.
    Wolke, Magnus
    Uppsala University, Disciplinary Domain of Science and Technology, Physics, Department of Physics and Astronomy, Nuclear Physics.
    Wronska, A.
    Wuestner, P.
    Wurm, P.
    Yamamoto, A.
    Zabierowski, J.
    Zielinski, M. J.
    Zink, A.
    Zlomanczuk, Jozef
    Uppsala University, Disciplinary Domain of Science and Technology, Physics, Department of Physics and Astronomy, Nuclear Physics.
    Zupranski, P.
    Zurek, M.
    Measurement of the np -> np pi(0)pi(0) reaction in search for the recently observed d* (2380) resonance2015In: Physics Letters B, ISSN 0370-2693, E-ISSN 1873-2445, Vol. 743, p. 325-332Article in journal (Refereed)
    Abstract [en]

    Exclusive measurements of the quasi-free np --> np pi(0)pi(0) reaction have been performed by means of dp collisions at T-d = 2.27 GeV using the WASA detector setup at COSY. Total and differential cross sections have been obtained covering the energy region root s = (2.35-2.46) GeV, which includes the region of the ABC effect and its associated d* (2380) resonance. Adding the d* resonance amplitude to that for the conventional processes leads to a reasonable description of the data. The observed resonance effect in the total cross section is in agreement with the predictions of Faldt and Wilkin as well with those of Albadajedo and Oset. The ABC effect, i.e. the low-mass enhancement in the pi(0)pi(0)-invariant mass spectrum, is found to be very modest - if present at all, which might pose a problem to some of its interpretations.

  • 228. Ambrosino, F.
    et al.
    Antonelli, A.
    Antonelli, M.
    Archilli, F.
    Balwierz, I.
    Bencivenni, G.
    Bini, C.
    Bloise, C.
    Bocchetta, S.
    Bossi, F.
    Branchini, P.
    Capon, G.
    Capussela, T.
    Ceradini, F.
    Ciambrone, P.
    Czerwiń„ski, E.
    De Lucia, E.
    De Santis, A.
    De Simone, P.
    De Zorzi, G.
    Denig, A.
    Di Domenico, A.
    Di Donato, C.
    Di Micco, B.
    Dreucci, M.
    Felici, G.
    Fiore, S.
    Franzini, P.
    Gatti, C.
    Gauzzi, P.
    Giovannella, S.
    Graziani, E.
    Jacewicz, M.
    Lee-Franzini, J.
    Martemianov, M.
    Martini, M.
    Massarotti, P.
    Meola, S.
    Miscetti, S.
    Morello, G.
    Moulson, M.
    Müller, S.
    Napolitano, M.
    Nguyen, F.
    Palutan, M.
    Passeri, A.
    Patera, V.
    Prado Longhi, I.
    Santangelo, P.
    Sciascia, B.
    Silarski, M.
    Spadaro, T.
    Taccini, C.
    Tortora, L.
    Venanzoni, G.
    Versaci, R.
    Xu, G.
    Zdebik, J.
    Babusci, D.
    Badoni, D.
    Bocci, V.
    Budano, A.
    Bulychjev, S. A.
    Campana, P.
    Dané, E.
    De Robertis, G.
    Domenici, D.
    Erriquez, O.
    Fanizzi, G.
    Gonnella, F.
    Happacher, F.
    Höistad, Bo
    Uppsala University, Disciplinary Domain of Science and Technology, Physics, Department of Physics and Astronomy, Nuclear Physics.
    Iarocci, E.
    Johansson, Tord
    Uppsala University, Disciplinary Domain of Science and Technology, Physics, Department of Physics and Astronomy, Nuclear Physics.
    Kulikov, V.
    Kupsc, Andrzej
    Uppsala University, Disciplinary Domain of Science and Technology, Physics, Department of Physics and Astronomy, Nuclear Physics.
    Loddo, F.
    Matsyuk, M.
    Messi, R.
    Moricciani, D.
    Moskal, P.
    Ranieri, A.
    Sarra, I.
    Schioppa, M.
    Sciubba, A.
    Wiślicki, W.
    Wolke, Magnus
    Uppsala University, Disciplinary Domain of Science and Technology, Physics, Department of Physics and Astronomy, Nuclear Physics.
    Observation of the rare ηe+ee+e decay with the KLOE experiment2011In: Physics Letters B, ISSN 0370-2693, E-ISSN 1873-2445, Vol. 702, no 5, p. 324-328Article in journal (Refereed)
  • 229. Amelino-Camelia, G.
    et al.
    Archilli, F.
    Babusci, D.
    Badoni, D.
    Bencivenni, G.
    Bernabeu, J.
    Bertlmann, R. A.
    Boito, D. R.
    Bini, C.
    Bloise, C.
    Bocci, V.
    Bossi, F.
    Branchini, P.
    Budano, A.
    Bulychjev, S. A.
    Campana, P.
    Capon, G.
    Ceradini, F.
    Ciambrone, P.
    Czerwinski, E.
    Czyz, H.
    D'Ambrosio, G.
    Dane, E.
    De Lucia, E.
    De Robertis, G.
    De Santis, A.
    De Simone, P.
    De Zorzi, G.
    Di Domenico, A.
    Di Donato, C.
    Di Micco, B.
    Domenici, D.
    Eidelman, S. I.
    Erriquez, O.
    Escribano, R.
    Essig, R.
    Fedotovich, G. V.
    Felici, G.
    Fiore, S.
    Franzini, P.
    Gauzzi, P.
    Giacosa, F.
    Giovannella, S.
    Gonnella, F.
    Graziani, E.
    Happacher, F.
    Hiesmayr, B. C.
    Höistad, Bo
    Uppsala University, Disciplinary Domain of Science and Technology, Physics, Department of Physics and Astronomy, Nuclear Physics.
    Iarocci, E.
    Ivashyn, S.
    Jacewicz, M.
    Jegerlehner, F.
    Johansson, Tord
    Uppsala University, Disciplinary Domain of Science and Technology, Physics, Department of Physics and Astronomy, Nuclear Physics.
    Lee-Franzini, J.
    Kluge, W.
    Kulikov, V. V.
    Kupsc, Andrzej
    Uppsala University, Disciplinary Domain of Science and Technology, Physics, Department of Physics and Astronomy, Nuclear Physics.
    Lehnert, R.
    Loddo, F.
    Lukin, P.
    Martemianov, M. A.
    Martini, M.
    Matsyuk, M. A.
    Mavromatos, N. E.
    Mescia, F.
    Messi, R.
    Miscetti, S.
    Morello, G.
    Moricciani, D.
    Moskal, P.
    Mueller, S.
    Nguyen, F.
    Passemar, E.
    Passera, M.
    Passeri, A.
    Patera, V.
    Pennington, M. R.
    Prades, J.
    Quintieri, L.
    Ranieri, A.
    Reece, M.
    Santangelo, P.
    Sarkar, S.
    Sarra, I.
    Schioppa, M.
    Schuster, P. C.
    Sciascia, B.
    Sciubba, A.
    Silarski, M.
    Taccini, C.
    Toro, N.
    Tortora, L.
    Venanzoni, G.
    Versaci, R.
    Wang, L. -T
    Wislicki, W.
    Wolke, Magnus
    Uppsala University, Disciplinary Domain of Science and Technology, Physics, Department of Physics and Astronomy, Nuclear Physics.
    Zdebik, J.
    Physics with the KLOE-2 experiment at the upgraded DA Phi NE2010In: European Physical Journal C, ISSN 1434-6044, E-ISSN 1434-6052, Vol. 68, no 3-4, p. 619-681Article, review/survey (Refereed)
    Abstract [en]

    Investigation at a f-factory can shed light on several debated issues in particle physics. We discuss: (i) recent theoretical development and experimental progress in kaon physics relevant for the Standard Model tests in the flavor sector, (ii) the sensitivity we can reach in probing CPT and Quantum Mechanics from time evolution of entangled-kaon states, (iii) the interest for improving on the present measurements of non-leptonic and radiative decays of kaons and eta/eta' mesons, (iv) the contribution to understand the nature of light scalar mesons, and (v) the opportunity to search for narrow di-lepton resonances suggested by recent models proposing a hidden dark-matter sector. We also report on the e(+)e(-) physics in the continuum with the measurements of (multi) hadronic cross sections and the study of gamma gamma processes.

  • 230.
    Amoroso, A.
    et al.
    NFN Turin, Turin, Italy.;Univ Turin, I-10124 Turin, Italy..
    Baldini, R.
    Ist Nazl Fis Nucl, Lab Nazl Frascati, POB 13, I-00044 Frascati, Italy..
    Bertani, M.
    Ist Nazl Fis Nucl, Lab Nazl Frascati, POB 13, I-00044 Frascati, Italy..
    Bettoni, D.
    INFN Ferrara, Ferrara, Italy..
    Bianchi, F.
    NFN Turin, Turin, Italy.;Univ Turin, I-10124 Turin, Italy..
    Calcaterra, A.
    Ist Nazl Fis Nucl, Lab Nazl Frascati, POB 13, I-00044 Frascati, Italy..
    Carassiti, V.
    INFN Ferrara, Ferrara, Italy..
    Cerioni, S.
    Ist Nazl Fis Nucl, Lab Nazl Frascati, POB 13, I-00044 Frascati, Italy..
    Chai, J.
    NFN Turin, Turin, Italy.;Inst High Energy Phys, Beijing 100039, Peoples R China..
    Cibinetto, G.
    INFN Ferrara, Ferrara, Italy..
    Cotto, G.
    NFN Turin, Turin, Italy.;Univ Turin, I-10124 Turin, Italy..
    De Mori, F.
    NFN Turin, Turin, Italy.;Univ Turin, I-10124 Turin, Italy..
    Destefanis, M.
    NFN Turin, Turin, Italy.;Univ Turin, I-10124 Turin, Italy..
    Dong, J.
    Ist Nazl Fis Nucl, Lab Nazl Frascati, POB 13, I-00044 Frascati, Italy.;Inst High Energy Phys, Beijing 100039, Peoples R China..
    Dong, M.
    Inst High Energy Phys, Beijing 100039, Peoples R China..
    Farinelli, R.
    INFN Ferrara, Ferrara, Italy.;Univ Ferrara, I-44100 Ferrara, Italy..
    Fava, L.
    NFN Turin, Turin, Italy.;Univ Turin, I-10124 Turin, Italy..
    Felici, G.
    Ist Nazl Fis Nucl, Lab Nazl Frascati, POB 13, I-00044 Frascati, Italy..
    Fioravanti, E.
    INFN Ferrara, Ferrara, Italy..
    Garzia, I.
    INFN Ferrara, Ferrara, Italy..
    Gatta, M.
    Ist Nazl Fis Nucl, Lab Nazl Frascati, POB 13, I-00044 Frascati, Italy..
    Greco, M.
    NFN Turin, Turin, Italy.;Univ Turin, I-10124 Turin, Italy..
    Hu, J. F.
    NFN Turin, Turin, Italy.;Univ Turin, I-10124 Turin, Italy..
    Johansson, Tord
    Uppsala University, Disciplinary Domain of Science and Technology, Physics, Department of Physics and Astronomy, Nuclear Physics.
    Leng, C.
    NFN Turin, Turin, Italy.;Inst High Energy Phys, Beijing 100039, Peoples R China..
    Li, H.
    NFN Turin, Turin, Italy.;Inst High Energy Phys, Beijing 100039, Peoples R China..
    Liu, Z.
    Inst High Energy Phys, Beijing 100039, Peoples R China..
    Maggiora, M.
    NFN Turin, Turin, Italy.;Univ Turin, I-10124 Turin, Italy..
    Marcello, S.
    NFN Turin, Turin, Italy.;Univ Turin, I-10124 Turin, Italy..
    Marciniewski, Pawel
    Uppsala University, Disciplinary Domain of Science and Technology, Physics, Department of Physics and Astronomy, Nuclear Physics.
    Melchiorri, M.
    INFN Ferrara, Ferrara, Italy..
    Mezzadri, G.
    INFN Ferrara, Ferrara, Italy.;Univ Ferrara, I-44100 Ferrara, Italy..
    Morello, G.
    Ist Nazl Fis Nucl, Lab Nazl Frascati, POB 13, I-00044 Frascati, Italy..
    Ouyan, Q.
    Inst High Energy Phys, Beijing 100039, Peoples R China..
    Pacetti, S.
    NFN, Milan, Italy.;Univ Perugia, I-06100 Perugia, Italy..
    Patteri, P.
    Ist Nazl Fis Nucl, Lab Nazl Frascati, POB 13, I-00044 Frascati, Italy..
    Rivetti, A.
    NFN Turin, Turin, Italy..
    Rosner, C.
    Johannes Gutenberg Univ Mainz, Mainz, Germany..
    Savrie, M.
    INFN Ferrara, Ferrara, Italy.;Univ Ferrara, I-44100 Ferrara, Italy..
    Sosio, S.
    NFN Turin, Turin, Italy.;Univ Turin, I-10124 Turin, Italy..
    Spataro, S.
    NFN Turin, Turin, Italy.;Univ Turin, I-10124 Turin, Italy..
    Tskhadadze, E.
    Joint Inst Nucl Res, Dubna, Russia..
    Wang, K.
    Inst High Energy Phys, Beijing 100039, Peoples R China..
    Wang, L.
    Inst High Energy Phys, Beijing 100039, Peoples R China..
    Wu, L.
    Inst High Energy Phys, Beijing 100039, Peoples R China..
    Ji, X.
    Inst High Energy Phys, Beijing 100039, Peoples R China..
    Ye, M.
    Inst High Energy Phys, Beijing 100039, Peoples R China..
    Zallo, A.
    Ist Nazl Fis Nucl, Lab Nazl Frascati, POB 13, I-00044 Frascati, Italy..
    Zhang, Y.
    Inst High Energy Phys, Beijing 100039, Peoples R China..
    Zotti, L.
    NFN Turin, Turin, Italy.;Univ Turin, I-10124 Turin, Italy..
    A cylindrical GEM detector with analog readout for the BESIII experiment2016In: Nuclear Instruments and Methods in Physics Research Section A: Accelerators, Spectrometers, Detectors and Associated Equipment, ISSN 0168-9002, E-ISSN 1872-9576, Vol. 824, p. 515-517Article in journal (Refereed)
    Abstract [en]

    A cylindrical GEM detector with analog readout is under development for the upgrade of the Inner Tracker of the BESIII experiment at IHEP (Beijing). The new detector will match the requirements for momentum resolution (sigma(pt) /p(t) similar to 0.5% at 1 GeV) and radial resolution (sigma(xy) similar to 120 mu m) of the existing drift chamber and will improve significantly the spatial resolution along the beam direction (sigma(z) similar to 150 mu m) with very small material budget (less than 1.5% of X-0). With respect to the state of the art the following innovations will be deployed: a lighter mechanical structure based on Rohacell, a new XV anode readout plane with jagged strip layout to reduce the parasitic capacitance, and the use of the analogue readout inside a high intensity magnetic field to have good spatial resolution without increasing the number of channels.

  • 231. Anastasi, A.
    et al.
    Babusci, D.
    Bencivenni, G.
    Berlowski, M.
    Bloise, C.
    Bossi, F.
    Branchini, P.
    Budano, A.
    Balkestahl, Li Caldeira
    Uppsala University, Disciplinary Domain of Science and Technology, Physics, Department of Physics and Astronomy, Nuclear Physics.
    Cao, B.
    Ceradini, F.
    Ciambrone, P.
    Curciarello, F.
    Czerwiriski, E.
    D'Agostini, G.
    Dane, E.
    De Leo, V.
    De Lucia, E.
    De Santis, A.
    De Simone, P.
    Di Cicco, A.
    Di Domenico, A.
    Di Salvo, R.
    Domenici, D.
    D'Uffizi, A.
    Fantini, A.
    Felici, G.
    Fiore, S.
    Gajos, A.
    Gauzzi, P.
    Giardina, G.
    Giovannella, S.
    Graziani, E.
    Happacher, F.
    Heijkenskjold, Lena
    Uppsala University, Disciplinary Domain of Science and Technology, Physics, Department of Physics and Astronomy, Nuclear Physics.
    Ikegami, Walter Andersson
    Uppsala University, Disciplinary Domain of Science and Technology, Physics, Department of Physics and Astronomy, Nuclear Physics.
    Johansson, Tord
    Uppsala University, Disciplinary Domain of Science and Technology, Physics, Department of Physics and Astronomy, Nuclear Physics.
    Kaminska, D.
    Uppsala University, Disciplinary Domain of Science and Technology, Physics, Department of Physics and Astronomy, Nuclear Physics.
    Krzemien, W.
    Kupsc, Andrezej
    Uppsala University, Disciplinary Domain of Science and Technology, Physics, Department of Physics and Astronomy, Nuclear Physics.
    Loffredo, S.
    Mandaglio, G.
    Martini, M.
    Mascolo, M.
    Messi, R.
    Miscetti, S.
    Morello, G.
    Moricciani, D.
    Moskal, P.
    Nguyen, F.
    Palladino, A.
    Passeri, A.
    Patera, V.
    del Rio, E. Perez
    Ranieri, A.
    Santangelo, P.
    Sarra, I.
    Schioppa, M.
    Silarski, M.
    Sirghi, F.
    Tortora, L.
    Venanzoni, G.
    Wislicki, W.
    Wolke, Magnus
    Uppsala University, Disciplinary Domain of Science and Technology, Physics, Department of Physics and Astronomy, Nuclear Physics.
    Search for dark Higgsstrahlung in e(+0)e(-) -> mu(+)mu(-) and missing energy events with the KLOE experiment2015In: Physics Letters B, ISSN 0370-2693, E-ISSN 1873-2445, Vol. 747, p. 365-372Article in journal (Refereed)
    Abstract [en]

    We searched for evidence of a Higgsstrahlung process in a secluded sector, leading to a final state with a dark photon U and a dark Higgs boson h', with the KLOE detector at DA Phi NE. We investigated the case of h' lighter than U, with U decaying into a muon pair and h' producing a missing energy signature. We found no evidence of the process and set upper limits to its parameters in the range 2m(mu) < m(U) < 1000 MeV, m(h') < m(U). (C) 2015 The Authors. Published by Elsevier B.V.

  • 232.
    Anastasi, A.
    et al.
    Ist Nazl Fis Nucl, Lab Nazl Frascati, I-00044 Frascati, Italy.;Univ Messina, Dipartimento Fis & Sci Terra, Messina, Italy..
    Babusci, D.
    Ist Nazl Fis Nucl, Lab Nazl Frascati, I-00044 Frascati, Italy..
    Bencivenni, G.
    Ist Nazl Fis Nucl, Lab Nazl Frascati, I-00044 Frascati, Italy..
    Berlowski, M.
    Natl Ctr Nucl Res, Warsaw, Poland..
    Bloise, C.
    Ist Nazl Fis Nucl, Lab Nazl Frascati, I-00044 Frascati, Italy..
    Bossi, F.
    Ist Nazl Fis Nucl, Lab Nazl Frascati, I-00044 Frascati, Italy..
    Branchini, P.
    Ist Nazl Fis Nucl, Sez Roma Tre, Rome, Italy..
    Budano, A.
    Univ Rome Tre, Dipartimento Matemat & Fis, I-00146 Rome, Italy.;Ist Nazl Fis Nucl, Sez Roma Tre, Rome, Italy..
    Balkeståhl, Li Caldeira
    Uppsala University, Disciplinary Domain of Science and Technology, Physics, Department of Physics and Astronomy, Nuclear Physics.
    Cao, Bo
    Uppsala University, Disciplinary Domain of Science and Technology, Physics, Department of Physics and Astronomy, Nuclear Physics.
    Ceradini, F.
    Univ Rome Tre, Dipartimento Matemat & Fis, I-00146 Rome, Italy.;Ist Nazl Fis Nucl, Sez Roma Tre, Rome, Italy..
    Ciambrone, R.
    Ist Nazl Fis Nucl, Lab Nazl Frascati, I-00044 Frascati, Italy..
    Curciarello, F.
    Ist Nazl Fis Nucl, Sez Catania, I-95129 Catania, Italy.;Univ Messina, Dipartimento Fis & Sci Terra, Messina, Italy.;Novosibirsk State Univ, Novosibirsk 630090, Russia..
    Czerwinski, E.
    Jagiellonian Univ, Inst Phys, Krakow, Poland..
    D'Agostini, G.
    Univ Roma La Sapienza, Dipartimento Fis, I-00185 Rome, Italy.;Ist Nazl Fis Nucl, Sez Roma, Rome, Italy..
    Dane, E.
    Ist Nazl Fis Nucl, Lab Nazl Frascati, I-00044 Frascati, Italy..
    De Leo, V.
    Ist Nazl Fis Nucl, Sez Roma Tre, Rome, Italy..
    De Lucia, E.
    Ist Nazl Fis Nucl, Lab Nazl Frascati, I-00044 Frascati, Italy..
    De Santis, A.
    Ist Nazl Fis Nucl, Lab Nazl Frascati, I-00044 Frascati, Italy..
    De Simone, P.
    Ist Nazl Fis Nucl, Lab Nazl Frascati, I-00044 Frascati, Italy..
    Di Cicco, A.
    Univ Rome Tre, Dipartimento Matemat & Fis, I-00146 Rome, Italy.;Ist Nazl Fis Nucl, Sez Roma Tre, Rome, Italy..
    Di Domenico, A.
    Univ Roma La Sapienza, Dipartimento Fis, I-00185 Rome, Italy.;Ist Nazl Fis Nucl, Sez Roma, Rome, Italy..
    Di Salvo, R.
    Ist Nazl Fis Nucl, Sez Roma Tor Vergata, Rome, Italy..
    Domenici, D.
    Ist Nazl Fis Nucl, Lab Nazl Frascati, I-00044 Frascati, Italy..
    D'Uffizi, A.
    Ist Nazl Fis Nucl, Lab Nazl Frascati, I-00044 Frascati, Italy..
    Fantini, A.
    Univ Roma Tor Vergata, Dipartimento Fis, Rome, Italy.;Ist Nazl Fis Nucl, Sez Roma Tor Vergata, Rome, Italy..
    Felici, G.
    Ist Nazl Fis Nucl, Lab Nazl Frascati, I-00044 Frascati, Italy..
    Fiore, S.
    Ist Nazl Fis Nucl, Sez Roma, Rome, Italy.;Casaccia RC, ENEA UTTMAT IRR, Rome, Italy..
    Gajos, A.
    Jagiellonian Univ, Inst Phys, Krakow, Poland..
    Gauzzi, P.
    Univ Roma La Sapienza, Dipartimento Fis, I-00185 Rome, Italy.;Ist Nazl Fis Nucl, Sez Roma, Rome, Italy..
    Giardina, G.
    Ist Nazl Fis Nucl, Sez Catania, I-95129 Catania, Italy.;Univ Messina, Dipartimento Fis & Sci Terra, Messina, Italy..
    Giovannella, S.
    Ist Nazl Fis Nucl, Lab Nazl Frascati, I-00044 Frascati, Italy..
    Graziani, E.
    Ist Nazl Fis Nucl, Sez Roma Tre, Rome, Italy..
    Happacher, F.
    Ist Nazl Fis Nucl, Lab Nazl Frascati, I-00044 Frascati, Italy..
    Heijkenskjold, Lena
    Uppsala University, Disciplinary Domain of Science and Technology, Physics, Department of Physics and Astronomy, Nuclear Physics.
    Andersson, Walter Ikegami
    Uppsala University, Disciplinary Domain of Science and Technology, Physics, Department of Physics and Astronomy, Nuclear Physics.
    Johansson, Tord
    Uppsala University, Disciplinary Domain of Science and Technology, Physics, Department of Physics and Astronomy, Nuclear Physics.
    Kaminska, D.
    Jagiellonian Univ, Inst Phys, Krakow, Poland..
    Krzemien, W.
    Natl Ctr Nucl Res, Warsaw, Poland..
    Kupsc, Andrezej
    Uppsala University, Disciplinary Domain of Science and Technology, Physics, Department of Physics and Astronomy, Nuclear Physics.
    Loffredo, S.
    Univ Rome Tre, Dipartimento Matemat & Fis, I-00146 Rome, Italy.;Ist Nazl Fis Nucl, Sez Roma Tre, Rome, Italy..
    Mandaglio, G.
    Univ Messina, Dipartimento Fis & Sci Terra, Messina, Italy.;Ist Nazl Fis Nucl, Grp Collegato Messina, Messina, Italy..
    Martini, M.
    Ist Nazl Fis Nucl, Lab Nazl Frascati, I-00044 Frascati, Italy.;Univ Guglielmo Marconi, Dipartimento Sci & Tecnol Applicate, Rome, Italy..
    Mascolo, M.
    Ist Nazl Fis Nucl, Lab Nazl Frascati, I-00044 Frascati, Italy..
    Messi, R.
    Univ Roma Tor Vergata, Dipartimento Fis, Rome, Italy.;Ist Nazl Fis Nucl, Sez Roma Tor Vergata, Rome, Italy..
    Miscetti, S.
    Ist Nazl Fis Nucl, Lab Nazl Frascati, I-00044 Frascati, Italy..
    Morello, G.
    Ist Nazl Fis Nucl, Lab Nazl Frascati, I-00044 Frascati, Italy..
    Moricciani, D.
    Ist Nazl Fis Nucl, Sez Roma Tor Vergata, Rome, Italy..
    Moskal, P.
    Jagiellonian Univ, Inst Phys, Krakow, Poland..
    Palladino, A.
    Ist Nazl Fis Nucl, Lab Nazl Frascati, I-00044 Frascati, Italy..
    Papenbrock, Michael
    Uppsala University, Disciplinary Domain of Science and Technology, Physics, Department of Physics and Astronomy, Nuclear Physics.
    Passeri, A.
    Ist Nazl Fis Nucl, Sez Roma Tre, Rome, Italy..
    Patera, V.
    Univ Roma La Sapienza, Dipartimento Sci Base & Applicate Ingn, I-00185 Rome, Italy.;Ist Nazl Fis Nucl, Sez Roma, Rome, Italy..
    del Rio, E. Perez
    Ist Nazl Fis Nucl, Lab Nazl Frascati, I-00044 Frascati, Italy..
    Ranieri, A.
    Ist Nazl Fis Nucl, Sez Bari, I-70126 Bari, Italy..
    Santangelo, P.
    Ist Nazl Fis Nucl, Lab Nazl Frascati, I-00044 Frascati, Italy..
    Sarra, I.
    Ist Nazl Fis Nucl, Lab Nazl Frascati, I-00044 Frascati, Italy..
    Schioppa, M.
    Univ Calabria, Dipartimento Fis, I-87036 Arcavacata Di Rende, Italy.;Ist Nazl Fis Nucl, Grp Collegato Cosenza, Arcavacata Di Rende, Italy..
    Silarski, M.
    Ist Nazl Fis Nucl, Lab Nazl Frascati, I-00044 Frascati, Italy..
    Sirghi, F.
    Ist Nazl Fis Nucl, Lab Nazl Frascati, I-00044 Frascati, Italy..
    Tortora, L.
    Ist Nazl Fis Nucl, Sez Roma Tre, Rome, Italy..
    Venanzoni, G.
    Ist Nazl Fis Nucl, Lab Nazl Frascati, I-00044 Frascati, Italy..
    Wislicki, W.
    Natl Ctr Nucl Res, Warsaw, Poland..
    Wolke, Magnus
    Uppsala University, Disciplinary Domain of Science and Technology, Physics, Department of Physics and Astronomy, Nuclear Physics.
    Limit on the production of a low-mass vector boson in e(+)e(-) -> U gamma, U -> e(+)e(-) with the KLOE experiment2015In: Physics Letters B, ISSN 0370-2693, E-ISSN 1873-2445, Vol. 750, p. 633-637Article in journal (Refereed)
    Abstract [en]

    The existence of a new force beyond the Standard Model is compelling because it could explain several striking astrophysical observations which fail standard interpretations. We searched for the light vector mediator of this dark force, the U boson, with the KLOE detector at the DA Phi NE e(+)e(-) collider. Using an integrated luminosity of 1.54 fb(-1), we studied the process e(+)e(-) -> U gamma, with U -> e(+)e(-), using radiative return to search for a resonant peak in the dielectron invariant-mass distribution. We did not find evidence for a signal, and set a 90% CL upper limit on the mixing strength between the Standard Model photon and the dark photon, epsilon(2), at 10(-6)-10(-4) in the 5-520 MeV/c(2) mass range.

  • 233. Anastasi, A.
    et al.
    Babusci, D.
    Bencivenni, G.
    Berlowski, M.
    Bloise, C.
    Bossi, F.
    Branchini, P.
    Budano, A.
    Caldeira Balkeståh, Li
    Uppsala University, Disciplinary Domain of Science and Technology, Physics, Department of Physics and Astronomy, Nuclear Physics.
    Cao, B.
    Uppsala University, Disciplinary Domain of Science and Technology, Physics, Department of Physics and Astronomy, Nuclear Physics.
    Ceradini, F.
    Ciambrone, P.
    Curciarello, F.
    Czerwiński, E.
    D'Agostini, G.
    Danè, E.
    De Leo, V.
    De Lucia, E.
    De Santis, A.
    De Simone, P.
    Di Cicco, A.
    Di Domenico, A.
    Di Salvo, R.
    Domenici, D.
    D'Uffizi, A.
    Fantini, A.
    Felici, G.
    Fiore, S.
    Gajos, A.
    Gauzzi, P.
    Giardina, G.
    Giovannella, S.
    Graziani, E.
    Happacher, F.
    Heijkenskjöld, Lena
    Uppsala University, Disciplinary Domain of Science and Technology, Physics, Department of Physics and Astronomy, Nuclear Physics.
    Ikegami Andersson, Walter
    Uppsala University, Disciplinary Domain of Science and Technology, Physics, Department of Physics and Astronomy, Nuclear Physics.
    Johansson, Tord
    Uppsala University, Disciplinary Domain of Science and Technology, Physics, Department of Physics and Astronomy, Nuclear Physics.
    Kamińska, D.
    Krzemien, W.
    Kupsc, A.
    Uppsala University, Disciplinary Domain of Science and Technology, Physics, Department of Physics and Astronomy, Nuclear Physics.
    Loffredo, S.
    Mandaglio, G.
    Martini, M.
    Mascolo, M.
    Messi, R.
    Miscetti, S.
    Morello, G.
    Moricciani, D.
    Moskal, P.
    Palladino, A.
    Papenbrock, Michael
    Uppsala University, Disciplinary Domain of Science and Technology, Physics, Department of Physics and Astronomy, Nuclear Physics.
    Passeri, A.
    Patera, V.
    Perez del Rio, E.
    Ranieri, A.
    Santangelo, P.
    Sarra, I.
    Schioppa, M.
    Silarski, M.
    Sirghi, F.
    Tortora, L.
    Venanzoni, G.
    Wiślicki, W.
    Wolke, Magnus
    Uppsala University, Disciplinary Domain of Science and Technology, Physics, Department of Physics and Astronomy, Nuclear Physics.
    Limit on the production of a new vector boson in e+e− → Uγ, U → π+π− with the KLOE experiment2016In: Physics Letters B, ISSN 0370-2693, E-ISSN 1873-2445, Vol. 757, p. 356-361Article in journal (Refereed)
    Abstract [en]

    Abstract The recent interest in a light gauge boson in the framework of an extra U(1) symmetry motivates searches in the mass range below 1 GeV. We present a search for such a particle, the dark photon, in e + e − → U γ , U → π + π − based on 28 million e + e − → π + π − γ events collected at DAΦNE by the KLOE experiment. The π + π − production by initial-state radiation compensates for a loss of sensitivity of previous KLOE U → e + e − , μ + μ − searches due to the small branching ratios in the ρ – ω resonance region. We found no evidence for a signal and set a limit at 90% CL on the mixing strength between the photon and the dark photon, ε 2 , in the U mass range between 527 and 987 MeV . Above 700 MeV this new limit is more stringent than previous ones.

  • 234. Anastasi, A.
    et al.
    Babusci, D.
    Bencivenni, G.
    Berlowski, M.
    Bloise, C.
    Bossi, F.
    Branchini, P.
    Budano, A.
    Caldeira Balkeståh, Li
    Uppsala University, Disciplinary Domain of Science and Technology, Physics, Department of Physics and Astronomy, Nuclear Physics.
    Cao, Bo
    Uppsala University, Disciplinary Domain of Science and Technology, Physics, Department of Physics and Astronomy, Nuclear Physics.
    Ceradini, F.
    Ciambrone, P.
    Curciarello, F.
    Czerwinski, E.
    D’Agostini, G.
    Danè, E.
    De Leo, V.
    De Lucia, E.
    De Santis, A.
    De Simone, P.
    Di Cicco, A.
    Di Domenico, A.
    Di Salvo, R.
    Domenici, D.
    D’Uffizi, A.
    Fantini, A.
    Felici, G.
    Fiore, S.
    Gajos, A.
    Gauzzi, P.
    Giardina, G.
    Giovannella, S.
    Graziani, E.
    Happacher, F.
    Heijkenskjöld, Lena
    Uppsala University, Disciplinary Domain of Science and Technology, Physics, Department of Physics and Astronomy, Nuclear Physics.
    Ikegami Andersson, Walter
    Uppsala University, Disciplinary Domain of Science and Technology, Physics, Department of Physics and Astronomy, Nuclear Physics.
    Johansson, Tord
    Uppsala University, Disciplinary Domain of Science and Technology, Physics, Department of Physics and Astronomy, Nuclear Physics.
    Kaminska, D.
    Krzemien, W.
    Kupsc, Andrzej
    Uppsala University, Disciplinary Domain of Science and Technology, Physics, Department of Physics and Astronomy, Nuclear Physics.
    Loffredo, S.
    Mandaglio, G.
    Martini, M.
    Mascolo, M.
    Messi, R.
    Miscetti, S.
    Morello, G.
    Moricciani, D.
    Moskal, P.
    Papenbrock, Michael
    Uppsala University, Disciplinary Domain of Science and Technology, Physics, Department of Physics and Astronomy, Nuclear Physics.
    Passeri, A.
    Patera, V.
    Perez del Rio, E.
    Ranieri, A.
    Santangelo, P.
    Sarra, I.
    Schioppa, M.
    Silarski, M.
    Sirghi, F.
    Tortora, L.
    Venanzoni, G.
    Wislicki, W.
    Wolke, Magnus
    Uppsala University, Disciplinary Domain of Science and Technology, Physics, Department of Physics and Astronomy, Nuclear Physics.
    Precision measurement of the η → π + π − π 0 Dalitz plot distribution with the KLOE detector2016In: Journal of High Energy Physics (JHEP), ISSN 1126-6708, E-ISSN 1029-8479, no 5, article id 019Article in journal (Refereed)
    Abstract [en]

    Using 1.6 fb−1 of e + e − → ϕ → ηγ data collected with the KLOE detector at DAΦNE, the Dalitz plot distribution for the η → π + π − π 0 decay is studied with the world’s largest sample of ∼ 4.7 · 106 events. The Dalitz plot density is parametrized as a polynomial expansion up to cubic terms in the normalized dimensionless variables X and Y . The experiment is sensitive to all charge conjugation conserving terms of the expansion, including a gX 2 Y term. The statistical uncertainty of all parameters is improved by a factor two with respect to earlier measurements.

  • 235.
    Anastasi, A.
    et al.
    Ist Nazl Fis Nucl, Lab Nazl Frascati, Frascati, Italy.;Univ Messina, Dipartimento Sci Matemat & Informat, Sci Fis & Sci Terra, Messina, Italy..
    Babusci, D.
    Ist Nazl Fis Nucl, Lab Nazl Frascati, Frascati, Italy..
    Bencivenni, G.
    Berlowski, M.
    Bloise, C.
    Ist Nazl Fis Nucl, Lab Nazl Frascati, Frascati, Italy..
    Bossi, F.
    Ist Nazl Fis Nucl, Lab Nazl Frascati, Frascati, Italy..
    Branchini, R.
    Ist Nazl Fis Nucl, Sez Roma Tre, Rome, Italy..
    Budano, A.
    Ist Nazl Fis Nucl, Sez Roma Tre, Rome, Italy..
    Caldeira Balkeståhl, Li
    Uppsala University, Disciplinary Domain of Science and Technology, Physics, Department of Physics and Astronomy, Nuclear Physics.
    Cao, Bo
    Uppsala University, Disciplinary Domain of Science and Technology, Physics, Department of Physics and Astronomy, Nuclear Physics.
    Ceradini, F.
    Ist Nazl Fis Nucl, Sez Roma Tre, Rome, Italy..
    Ciambrone, R.
    Ist Nazl Fis Nucl, Lab Nazl Frascati, Frascati, Italy..
    Curciarello, F.
    Ist Nazl Fis Nucl, Sez Catania, Catania, Italy.;Univ Messina, Dipartimento Sci Matemat & Informat, Sci Fis & Sci Terra, Messina, Italy.;Novosibirsk State Univ, Novosibirsk 630090, Russia..
    Czerwinski, E.
    Jagiellonian Univ, Inst Phys, Krakow, Poland..
    D'Agostini, G.
    Univ Sapienza, Dipartimento Fis, Rome, Italy.;Ist Nazl Fis Nucl, Sez Roma, Rome, Italy..
    Dane, E.
    De Leo, V.
    Ist Nazl Fis Nucl, Sez Roma Tre, Rome, Italy..
    De Lucia, E.
    De Santis, A.
    Ist Nazl Fis Nucl, Lab Nazl Frascati, Frascati, Italy..
    De Simone, R.
    Ist Nazl Fis Nucl, Lab Nazl Frascati, Frascati, Italy..
    Di Cicco, A.
    Univ Roma Tre, Dipartimento Matemat & Fis, Rome, Italy.;Ist Nazl Fis Nucl, Sez Roma Tre, Rome, Italy..
    Di Domenico, A.
    Univ Sapienza, Dipartimento Fis, Rome, Italy.;Ist Nazl Fis Nucl, Sez Roma, Rome, Italy..
    Di Salvo, R.
    Domenici, D.
    Ist Nazl Fis Nucl, Lab Nazl Frascati, Frascati, Italy..
    D'Uffizi, A.
    Fantini, A.
    Univ Tor Vergata, Dipartimento Fis, Rome, Italy.;Ist Nazl Fis Nucl, Sez Roma Tor Vergata, Rome, Italy..
    Felici, G.
    Fiore, S.
    Ist Nazl Fis Nucl, Sez Roma, Rome, Italy.;Casaccia RC, ENEA UTTMAT IRR, Rome, Italy..
    Gajos, A.
    Jagiellonian Univ, Inst Phys, Krakow, Poland..
    Gauzzi, R.
    Univ Sapienza, Dipartimento Fis, Rome, Italy.;Ist Nazl Fis Nucl, Sez Roma, Rome, Italy..
    Giardina, G.
    Univ Messina, Dipartimento Sci Matemat & Informat, Sci Fis & Sci Terra, Messina, Italy..
    Giovannella, S.
    Ist Nazl Fis Nucl, Lab Nazl Frascati, Frascati, Italy..
    Graziani, E.
    Happacher, F.
    Ist Nazl Fis Nucl, Lab Nazl Frascati, Frascati, Italy..
    Heijkenskjöld, Lena
    Uppsala University, Disciplinary Domain of Science and Technology, Physics, Department of Physics and Astronomy, Nuclear Physics.
    Johansson, Tord
    Uppsala University, Disciplinary Domain of Science and Technology, Physics, Department of Physics and Astronomy, Nuclear Physics.
    Kaminska, D.
    Krzemien, W.
    Natl Ctr Nucl Res, Warsaw, Poland..
    Kupsc, Andrzej
    Uppsala University, Disciplinary Domain of Science and Technology, Physics, Department of Physics and Astronomy, Nuclear Physics.
    Loffredo, S.
    Lukin, P. A.
    Novosibirsk State Univ, Novosibirsk 630090, Russia.;Budker Inst Nucl Phys, Novosibirsk 630090, Russia..
    Mandaglio, G.
    Univ Messina, Dipartimento Sci Chim Biol Farmaceut & Ambientali, Messina, Italy.;Ist Nazl Fis Nucl, Grp Collegato Messina, Messina, Italy..
    Martini, M.
    Ist Nazl Fis Nucl, Lab Nazl Frascati, Frascati, Italy.;Univ Guglielmo Marconi, Dipartimento Sci & Tecnol Applicate, Rome, Italy..
    Mascolo, M.
    Ist Nazl Fis Nucl, Lab Nazl Frascati, Frascati, Italy..
    Messi, R.
    Univ Tor Vergata, Dipartimento Fis, Rome, Italy.;Ist Nazl Fis Nucl, Sez Roma Tor Vergata, Rome, Italy..
    Miscetti, S.
    Ist Nazl Fis Nucl, Lab Nazl Frascati, Frascati, Italy..
    Morello, G.
    Ist Nazl Fis Nucl, Lab Nazl Frascati, Frascati, Italy..
    Moricciani, D.
    Ist Nazl Fis Nucl, Sez Roma Tor Vergata, Rome, Italy..
    Moskal, R.
    Papenbrock, M.
    Passeri, A.
    Ist Nazl Fis Nucl, Sez Roma Tre, Rome, Italy..
    Patera, V.
    Univ Sapienza, Dipartimento Sci Base & Applicate Ingn, Rome, Italy..
    del Rio, E. Perez
    Ist Nazl Fis Nucl, Lab Nazl Frascati, Frascati, Italy..
    Ranieri, A.
    Ist Nazl Fis Nucl, Sez Bari, Bari, Italy..
    Santangelo, R.
    Ist Nazl Fis Nucl, Lab Nazl Frascati, Frascati, Italy..
    Sarra, I.
    Ist Nazl Fis Nucl, Lab Nazl Frascati, Frascati, Italy..
    Schioppa, M.
    Univ Calabria, Dipartimento Fis, Arcavacata Di Rende, Italy.;Ist Nazl Fis Nucl, Grp Collegato Cosenza, Arcavacata Di Rende, Italy..
    Selce, A.
    Univ Roma Tre, Dipartimento Matemat & Fis, Rome, Italy..
    Silarski, M.
    Ist Nazl Fis Nucl, Lab Nazl Frascati, Frascati, Italy..
    Sirghi, F.
    Ist Nazl Fis Nucl, Lab Nazl Frascati, Frascati, Italy..
    Tortora, L.
    Ist Nazl Fis Nucl, Sez Roma Tre, Rome, Italy..
    Venanzoni, G.
    Ist Nazl Fis Nucl, Lab Nazl Frascati, Frascati, Italy..
    Wislicki, W.
    Wolke, M.
    Jegerlehner, F.
    Uppsala University, Disciplinary Domain of Science and Technology, Physics, Department of Physics and Astronomy, Nuclear Physics. Humboldt Univ, Inst Phys, Berlin, Germany.;Deutsch Elektronen Synchrotron DESY, Platanenallee 6, D-15738 Zeuthen, Germany..
    Measurement of the running of the fine structure constant below 1 GeV with the KLOE detector2017In: Physics Letters B, ISSN 0370-2693, E-ISSN 1873-2445, Vol. 767, p. 485-492Article in journal (Refereed)
    Abstract [en]

    We have measured the running of the effective QED coupling constant alpha(s) in the time-like region 0.6 < root s < 0.975 GeV with the KLOE detector at DA Phi NE using the Initial-State Radiation process e(+) e(-) -> mu(+) mu(-)gamma. It represents the first measurement of the running of alpha(s) in this energy region. Our results show a more than 5 sigma significance of the hadronic contribution to the running of alpha(s), which is the strongest direct evidence both in time- and space-like regions achieved in a single measurement. By using the e(+) e(-) -> pi(+) pi(-) cross section measured by KLOE, the real and imaginary parts of the shift Delta alpha(s) have been extracted. From a fit of the real part of Delta alpha(s) and assuming the lepton universality the branching ratio BR(omega -> mu(+) mu(-)) = (6.6 +/- 1.4(stat) +/- 1.7(syst)) (.) 10 (5)has been determined.

  • 236.
    Anastasi, A.
    et al.
    INFN, Lab Nazl Frascati, Frascati, Italy.;Univ Messina, Dipartimento Sci Matemat & Informat Sci Fis & Sci, Messina, Italy..
    Babusci, D.
    INFN, Lab Nazl Frascati, Frascati, Italy..
    Berlowski, M.
    INFN, Lab Nazl Frascati, Frascati, Italy..
    Bloise, C.
    INFN, Lab Nazl Frascati, Frascati, Italy..
    Bossi, F.
    INFN, Lab Nazl Frascati, Frascati, Italy..
    Branchini, P.
    INFN, Sez Roma Tre, Rome, Italy..
    Budano, A.
    Univ Roma Tre, Dipartimento Matemat & Fis, Rome, Italy.;INFN, Sez Roma Tre, Rome, Italy..
    Balkeståhl, Li Caldeira
    Uppsala University, Disciplinary Domain of Science and Technology, Physics, Department of Physics and Astronomy, Nuclear Physics.
    Cao, Bo
    Uppsala University, Disciplinary Domain of Science and Technology, Physics, Department of Physics and Astronomy, Nuclear Physics.
    Ceradini, F.
    Univ Roma Tre, Dipartimento Matemat & Fis, Rome, Italy.;INFN, Sez Roma Tre, Rome, Italy..
    Ciambrone, P.
    INFN, Lab Nazl Frascati, Frascati, Italy..
    Curciarello, F.
    INFN, Lab Nazl Frascati, Frascati, Italy..
    Czerwinski, E.
    Jagiellonian Univ, Inst Phys, Krakow, Poland..
    D'Agostini, G.
    Univ Sapienza, Dipartimento Fis, Rome, Italy.;INFN, Sez Roma, Rome, Italy..
    Dane, E.
    INFN, Lab Nazl Frascati, Frascati, Italy..
    De Leo, V.
    INFN, Sez Roma Tor Vergata, Rome, Italy..
    De Lucia, E.
    INFN, Lab Nazl Frascati, Frascati, Italy..
    De Santis, A.
    INFN, Lab Nazl Frascati, Frascati, Italy..
    De Simone, P.
    INFN, Lab Nazl Frascati, Frascati, Italy..
    Di Cicco, A.
    Univ Roma Tre, Dipartimento Matemat & Fis, Rome, Italy.;INFN, Sez Roma Tre, Rome, Italy..
    Di Domenico, A.
    Univ Sapienza, Dipartimento Fis, Rome, Italy.;INFN, Sez Roma, Rome, Italy..
    Domenici, D.
    INFN, Lab Nazl Frascati, Frascati, Italy..
    D'Uffizi, A.
    INFN, Lab Nazl Frascati, Frascati, Italy..
    Fantini, A.
    Univ Tor Vergata, Dipartimento Fis, Rome, Italy.;INFN, Sez Roma Tor Vergata, Rome, Italy..
    Fantini, G.
    Gran Sasso Sci Inst, Laquila, Italy..
    Fermani, P.
    INFN, Lab Nazl Frascati, Frascati, Italy..
    Fiore, S.
    INFN, Sez Roma, Rome, Italy.;ENEA, Dept Fusion & Technol Nucl Safety & Secur, Frascati, RM, Italy..
    Gajos, A.
    Jagiellonian Univ, Inst Phys, Krakow, Poland..
    Gauzzi, P.
    Univ Sapienza, Dipartimento Fis, Rome, Italy.;INFN, Sez Roma, Rome, Italy..
    Giovannella, S.
    INFN, Lab Nazl Frascati, Frascati, Italy..
    Graziani, E.
    INFN, Sez Roma Tre, Rome, Italy..
    Ivanov, V. L.
    Budker Inst Nucl Phys, Novosibirsk, Russia.;Novosibirsk State Univ, Novosibirsk, Russia..
    Johansson, Tord
    Uppsala University, Disciplinary Domain of Science and Technology, Physics, Department of Physics and Astronomy, Nuclear Physics.
    Kang, X.
    INFN, Lab Nazl Frascati, Frascati, Italy..
    Kisielewska-Kaminska, D.
    Jagiellonian Univ, Inst Phys, Krakow, Poland..
    Kozyrev, E. A.
    Budker Inst Nucl Phys, Novosibirsk, Russia.;Novosibirsk State Univ, Novosibirsk, Russia..
    Krzemien, W.
    Natl Ctr Nucl Res, Warsaw, Poland..
    Kupsc, Andrzej
    Uppsala University, Disciplinary Domain of Science and Technology, Physics, Department of Physics and Astronomy, Nuclear Physics.
    Loffredo, S.
    Univ Roma Tre, Dipartimento Matemat & Fis, Rome, Italy.;INFN, Sez Roma Tre, Rome, Italy..
    Lukin, P. A.
    Budker Inst Nucl Phys, Novosibirsk, Russia.;Novosibirsk State Univ, Novosibirsk, Russia..
    Mandaglio, G.
    INFN, Sez Catania, Catania, Italy.;Univ Messina, Dipartimento Sci Chim Biol Farmaceut & Ambientali, Messina, Italy..
    Martini, M.
    INFN, Lab Nazl Frascati, Frascati, Italy.;Univ Guglielmo Marconi, Dipartimento Sci &Tecnol Applicate, Rome, Italy..
    Messi, R.
    Univ Tor Vergata, Dipartimento Fis, Rome, Italy.;INFN, Sez Roma Tor Vergata, Rome, Italy..
    Miscetti, S.
    INFN, Lab Nazl Frascati, Frascati, Italy..
    Morello, G.
    INFN, Lab Nazl Frascati, Frascati, Italy..
    Moricciani, D.
    INFN, Sez Roma Tor Vergata, Rome, Italy..
    Moskal, P.
    Jagiellonian Univ, Inst Phys, Krakow, Poland..
    Passeri, A.
    INFN, Sez Roma Tre, Rome, Italy..
    Patera, V.
    Univ Sapienza, Dipartimento Sci Base & Applicate Ingn, Rome, Italy.;INFN, Sez Roma, Rome, Italy..
    del Rio, E. Perez
    INFN, Lab Nazl Frascati, Frascati, Italy..
    Raha, N.
    INFN, Sez Roma Tor Vergata, Rome, Italy..
    Santangelo, P.
    INFN, Lab Nazl Frascati, Frascati, Italy..
    Schioppa, M.
    Univ Calabria, Dipartimento Fis, Arcavacata Di Rende, Italy.;INFN, Grp Collegato Cosenza, Arcavacata Di Rende, Italy..
    Selce, A.
    Univ Roma Tre, Dipartimento Matemat & Fis, Rome, Italy.;INFN, Sez Roma Tre, Rome, Italy..
    Silarski, M.
    Jagiellonian Univ, Inst Phys, Krakow, Poland..
    Sirghi, F.
    INFN, Lab Nazl Frascati, Frascati, Italy..
    Solodov, E. P.
    Budker Inst Nucl Phys, Novosibirsk, Russia.;Novosibirsk State Univ, Novosibirsk, Russia..
    Tortora, L.
    INFN, Sez Roma Tre, Rome, Italy..
    Venanzoni, G.
    INFN, Sez Pisa, Pisa, Italy..
    Wislicki, W.
    Natl Ctr Nucl Res, Warsaw, Poland..
    Wolke, Magnus
    Uppsala University, Disciplinary Domain of Science and Technology, Physics, Department of Physics and Astronomy, Nuclear Physics.
    Keshavarzi, A.
    Univ Liverpool, Dept Math Sci, Liverpool L69 3BX, Merseyside, England..
    Mueller, S. E.
    Helmholtz Zentrum Dresden Rossendorf, Dept Informat Serv & Comp, Dresden, Germany.;Helmholtz Zentrum Dresden Rossendorf, Inst Radiat Phys, Dresden, Germany..
    Teubner, T.
    Univ Liverpool, Dept Math Sci, Liverpool L69 3BX, Merseyside, England..
    Combination of KLOE sigma (e(+) e(-) -> pi(+)pi(-) gamma(gamma)) measurements and determination of a(mu)(pi+pi-) in the energy range 0.10 < s < 0.95 GeV22018In: Journal of High Energy Physics (JHEP), ISSN 1126-6708, E-ISSN 1029-8479, no 3, article id 173Article in journal (Refereed)
    Abstract [en]

    The three precision measurements of the cross section sigma (e(+)e(-) -> pi(+)pi(-)gamma(gamma)) using initial state radiation by the KLOE collaboration provide an important input for the prediction of the hadronic contribution to the anomalous magnetic moment of the muon. These measurements are correlated for both statistical and systematic uncertainties and, therefore, the simultaneous use of these measurements requires covariance matrices that fully describe the correlations. We present the construction of these covariance matrices and use them to determine a combined KLOE measurement for sigma (e(+)e(-) -> pi(+)pi(-)gamma(gamma)). We find, from this combination, a two-pion contribution to the muon magnetic anomaly in the energy range 0.10 < s < 0.95 GeV2 of a(mu)(pi+pi-) (489.8 +/- 1.7(stat) +/- 4.8(sys)) x 10(-10).

  • 237.
    Anastasi, A.
    et al.
    Univ Messina, Dipartimento Sci Matemat & Informat, Sci Fis & Sci Terra, Messina, Italy;Ist Nazl Fis Nucl, Lab Nazl Frascati, Frascati, Italy.
    Babusci, D.
    Ist Nazl Fis Nucl, Lab Nazl Frascati, Frascati, Italy.
    Berlowski, M.
    Ist Nazl Fis Nucl, Lab Nazl Frascati, Frascati, Italy;Natl Ctr Nucl Res, Warsaw, Poland.
    Bloise, C.
    Ist Nazl Fis Nucl, Lab Nazl Frascati, Frascati, Italy.
    Bossi, F.
    Ist Nazl Fis Nucl, Lab Nazl Frascati, Frascati, Italy.
    Branchini, P.
    Ist Nazl Fis Nucl, Sez Roma Tre, Rome, Italy.
    Budano, A.
    Ist Nazl Fis Nucl, Sez Roma Tre, Rome, Italy;Univ Roma Tre, Dipartimento Matemat & Fis, Rome, Italy.
    Cao, Bo
    Uppsala University, Disciplinary Domain of Science and Technology, Physics, Department of Physics and Astronomy, Nuclear Physics.
    Capon, G.
    Ist Nazl Fis Nucl, Lab Nazl Frascati, Frascati, Italy.
    Ceradini, F.
    Ist Nazl Fis Nucl, Sez Roma Tre, Rome, Italy;Univ Roma Tre, Dipartimento Matemat & Fis, Rome, Italy.
    Ciambrone, P.
    Ist Nazl Fis Nucl, Lab Nazl Frascati, Frascati, Italy.
    Curciarello, F.
    Ist Nazl Fis Nucl, Lab Nazl Frascati, Frascati, Italy.
    Czerwinski, E.
    Jagiellonian Univ, Inst Phys, Krakow, Poland.
    D'Agostini, G.
    Univ Sapienza, Dipartimento Fis, Rome, Italy;Ist Nazl Fis Nucl, Sez Roma, Rome, Italy.
    Dane, E.
    Ist Nazl Fis Nucl, Lab Nazl Frascati, Frascati, Italy.
    De Leo, V.
    Ist Nazl Fis Nucl, Sez Roma Tor Vergata, Rome, Italy.
    De Lucia, E.
    Ist Nazl Fis Nucl, Lab Nazl Frascati, Frascati, Italy.
    De Santis, A.
    Ist Nazl Fis Nucl, Lab Nazl Frascati, Frascati, Italy.
    De Simone, P.
    Ist Nazl Fis Nucl, Lab Nazl Frascati, Frascati, Italy.
    Di Cicco, A.
    Ist Nazl Fis Nucl, Sez Roma Tre, Rome, Italy;Univ Roma Tre, Dipartimento Matemat & Fis, Rome, Italy.
    Di Domenico, A.
    Univ Sapienza, Dipartimento Fis, Rome, Italy;Ist Nazl Fis Nucl, Sez Roma, Rome, Italy.
    Domenici, D.
    Ist Nazl Fis Nucl, Lab Nazl Frascati, Frascati, Italy.
    D'Uffizi, A.
    Ist Nazl Fis Nucl, Lab Nazl Frascati, Frascati, Italy.
    Fantini, A.
    Ist Nazl Fis Nucl, Sez Roma Tor Vergata, Rome, Italy;Univ Tor Vergata, Dipartimento Fis, Rome, Italy.
    Fantini, G.
    Gran Sasso Sci Inst, Laquila, Italy.
    Fermani, P.
    Ist Nazl Fis Nucl, Lab Nazl Frascati, Frascati, Italy.
    Fiore, S.
    Ist Nazl Fis Nucl, Sez Roma, Rome, Italy;Casaccia RC, ENEA UTTMAT IRR, Rome, Italy.
    Gajos, A.
    Jagiellonian Univ, Inst Phys, Krakow, Poland.
    Gauzzi, P.
    Univ Sapienza, Dipartimento Fis, Rome, Italy;Ist Nazl Fis Nucl, Sez Roma, Rome, Italy.
    Giovannella, S.
    Ist Nazl Fis Nucl, Lab Nazl Frascati, Frascati, Italy.
    Graziani, E.
    Ist Nazl Fis Nucl, Sez Roma Tre, Rome, Italy.
    Ivanov, V. L.
    Budker Inst Nucl Phys, Novosibirsk, Russia;Novosibirsk State Univ, Novosibirsk, Russia.
    Johansson, Tord
    Uppsala University, Disciplinary Domain of Science and Technology, Physics, Department of Physics and Astronomy, Nuclear Physics.
    Kang, X.
    Ist Nazl Fis Nucl, Lab Nazl Frascati, Frascati, Italy.
    Kisielewska-Kaminska, D.
    Jagiellonian Univ, Inst Phys, Krakow, Poland.
    Kozyrev, E. A.
    Novosibirsk State Univ, Novosibirsk, Russia.
    Krzemien, W.
    Univ Roma Tre, Dipartimento Matemat & Fis, Rome, Italy.
    Kupsc, Andrzej
    Uppsala University, Disciplinary Domain of Science and Technology, Physics, Department of Physics and Astronomy, Nuclear Physics.
    Loffredo, S.
    Ist Nazl Fis Nucl, Sez Roma Tre, Rome, Italy;Univ Roma Tre, Dipartimento Matemat & Fis, Rome, Italy.
    Lukin, P. A.
    Novosibirsk State Univ, Novosibirsk, Russia.
    Mandaglio, G.
    Univ Messina, Dipartimento Sci Chim Biol Farmaceut & Ambientali, Messina, Italy;Ist Nazl Fis Nucl, Sez Catania, Catania, Italy.
    Martini, M.
    Ist Nazl Fis Nucl, Lab Nazl Frascati, Frascati, Italy;Univ Guglielmo Marconi, Dipartimento Sci & Tecnol Applicate, Rome, Italy.
    Messi, R.
    Ist Nazl Fis Nucl, Sez Roma Tor Vergata, Rome, Italy;Univ Tor Vergata, Dipartimento Fis, Rome, Italy.
    Miscetti, S.
    Ist Nazl Fis Nucl, Lab Nazl Frascati, Frascati, Italy.
    Moricciani, D.
    Ist Nazl Fis Nucl, Sez Roma Tor Vergata, Rome, Italy.
    Moskal, P.
    Jagiellonian Univ, Inst Phys, Krakow, Poland.
    Passeri, A.
    Ist Nazl Fis Nucl, Sez Roma Tre, Rome, Italy.
    Patera, V.
    Ist Nazl Fis Nucl, Sez Roma, Rome, Italy;Univ Sapienza, Dipartimento Sci Base & Applicate Ingn, Rome, Italy.
    del Rio, E. Perez
    Ist Nazl Fis Nucl, Lab Nazl Frascati, Frascati, Italy.
    Raha, N.
    Ist Nazl Fis Nucl, Sez Roma Tor Vergata, Rome, Italy.
    Santangelo, P.
    Ist Nazl Fis Nucl, Lab Nazl Frascati, Frascati, Italy.
    Schioppa, M.
    Univ Calabria, Dipartimento Fis, Arcavacata Di Rende, Italy;Ist Nazl Fis Nucl, Grp Collegato Cosenza, Arcavacata Di Rende, Italy.
    Selce, A.
    Ist Nazl Fis Nucl, Sez Roma Tre, Rome, Italy;Univ Roma Tre, Dipartimento Matemat & Fis, Rome, Italy.
    Silarski, M.
    Jagiellonian Univ, Inst Phys, Krakow, Poland.
    Sirghi, F.
    Ist Nazl Fis Nucl, Lab Nazl Frascati, Frascati, Italy;Horia Hulubei Natl Inst Phys & Nucl Engn, Magurele, Romania.
    Solodov, E. P.
    Budker Inst Nucl Phys, Novosibirsk, Russia;Novosibirsk State Univ, Novosibirsk, Russia.
    Tortora, L.
    Ist Nazl Fis Nucl, Sez Roma Tre, Rome, Italy.
    Venanzoni, G.
    Ist Nazl Fis Nucl, Sez Pisa, Pisa, Italy.
    Wislicki, W.
    Natl Ctr Nucl Res, Warsaw, Poland.
    Wolke, Magnus
    Uppsala University, Disciplinary Domain of Science and Technology, Physics, Department of Physics and Astronomy, Nuclear Physics.
    Measurement of the charge asymmetry for the K-S -> pi e nu decay and test of CPT symmetry with the KLOE detector2018In: Journal of High Energy Physics (JHEP), ISSN 1126-6708, E-ISSN 1029-8479, no 9, article id 021Article in journal (Refereed)
    Abstract [en]

    Using 1.63 fb(-1) of integrated luminosity collected by the KLOE experiment about 7 x 10(4) K-S -> pi(+/-)e(-/+)nu decays have been reconstructed. The measured value of the charge asymmetry for this decay is A(S) = (-4.9 +/- 5.7(stat) +/- 2.6(syst)) x 10(-3) which is almost twice more precise than the previous KLOE result. The combination of these two measurements gives A(S) = (3.8 +/- 5.0(stat) +/- 2.6(syst)) x 10(-3) and, together with the asymmetry of the K-L semileptonic decay, provides significant tests of the CPT symmetry. The obtained results are in agreement with CPT invariance.

  • 238.
    Anastasi, A.
    et al.
    INFN, Lab Nazl Frascati, Frascati, Italy;Univ Messina, Sci Fis & Sci Terra, Dipartimento Sci Matemat & Informat, Messina, Italy.
    Babusci, D.
    INFN, Lab Nazl Frascati, Frascati, Italy.
    Berlowski, M.
    INFN, Lab Nazl Frascati, Frascati, Italy;Natl Ctr Nucl Res, Warsaw, Poland.
    Bloise, C.
    INFN, Lab Nazl Frascati, Frascati, Italy.
    Bossi, F.
    INFN, Lab Nazl Frascati, Frascati, Italy.
    Branchini, R.
    INFN, Sez Roma Tre, Rome, Italy.
    Budano, A.
    Univ Roma Tre, Dipartimento Matemat & Fis, Rome, Italy;INFN, Sez Roma Tre, Rome, Italy.
    Cao, Bo
    Uppsala University, Disciplinary Domain of Science and Technology, Physics, Department of Physics and Astronomy, Nuclear Physics.
    Ceradini, F.
    Univ Roma Tre, Dipartimento Matemat & Fis, Rome, Italy;INFN, Sez Roma Tre, Rome, Italy.
    Ciambrone, R.
    INFN, Lab Nazl Frascati, Frascati, Italy.
    Curciarello, F.
    INFN, Lab Nazl Frascati, Frascati, Italy.
    Czerwinski, E.
    Jagiellonian Univ, Inst Phys, Krakow, Poland.
    D'Agostini, G.
    Univ Sapienza, Dipartimento Fis, Rome, Italy;INFN, Sez Roma, Rome, Italy.
    Dane, E.
    INFN, Lab Nazl Frascati, Frascati, Italy.
    De Leo, V.
    INFN, Sez Roma Tor Vergata, Rome, Italy.
    De Lucia, E.
    INFN, Lab Nazl Frascati, Frascati, Italy.
    De Santis, A.
    INFN, Lab Nazl Frascati, Frascati, Italy.
    De Simone, R.
    INFN, Lab Nazl Frascati, Frascati, Italy.
    Di Cicco, A.
    Univ Roma Tre, Dipartimento Matemat & Fis, Rome, Italy;INFN, Sez Roma Tre, Rome, Italy.
    Di Domenico, A.
    Univ Sapienza, Dipartimento Fis, Rome, Italy;INFN, Sez Roma, Rome, Italy.
    Domenici, D.
    INFN, Lab Nazl Frascati, Frascati, Italy.
    D'Uffizi, A.
    INFN, Lab Nazl Frascati, Frascati, Italy.
    Fantini, A.
    Univ Tor Vergata, Dipartimento Fis, Rome, Italy;INFN, Sez Roma Tor Vergata, Rome, Italy.
    Fantini, G.
    Gran Sasso Sci Inst, Laquila, Italy.
    Fermani, R.
    INFN, Lab Nazl Frascati, Frascati, Italy.
    Fiore, S.
    INFN, Sez Roma, Rome, Italy;ENEA, Dept Fus & Technol Nucl Safety & Secur, Frascati, RM, Italy.
    Gajos, A.
    Jagiellonian Univ, Inst Phys, Krakow, Poland.
    Gauzzi, R.
    Univ Sapienza, Dipartimento Fis, Rome, Italy;INFN, Sez Roma, Rome, Italy.
    Giovannella, S.
    INFN, Lab Nazl Frascati, Frascati, Italy.
    Graziani, E.
    INFN, Sez Roma Tre, Rome, Italy.
    Ivanov, V. L.
    Budker Inst Nucl Phys, Novosibirsk, Russia;Novosibirsk State Univ, Novosibirsk, Russia.
    Johansson, Tord
    Uppsala University, Disciplinary Domain of Science and Technology, Physics, Department of Physics and Astronomy, Nuclear Physics.
    Kang, X.
    INFN, Lab Nazl Frascati, Frascati, Italy.
    Kisielewska-Kaminska, D.
    Jagiellonian Univ, Inst Phys, Krakow, Poland.
    Kozyrev, E. A.
    Budker Inst Nucl Phys, Novosibirsk, Russia;Novosibirsk State Univ, Novosibirsk, Russia.
    Krzemien, W.
    Natl Ctr Nucl Res, Warsaw, Poland.
    Kupsc, Andrzej
    Uppsala University, Disciplinary Domain of Science and Technology, Physics, Department of Physics and Astronomy, Nuclear Physics.
    Lukin, P. A.
    Budker Inst Nucl Phys, Novosibirsk, Russia;Novosibirsk State Univ, Novosibirsk, Russia.
    Mandaglio, G.
    INFN, Sez Catania, Catania, Italy;Univ Messina, Dipartimento Sci Chim, Biol Farmaceut & Ambientali, Messina, Italy.
    Martini, M.
    INFN, Lab Nazl Frascati, Frascati, Italy;Univ Guglielmo Marconi, Dipartimento Sci & Tecnol Appl, Rome, Italy.
    Messi, R.
    Univ Tor Vergata, Dipartimento Fis, Rome, Italy;INFN, Sez Roma Tor Vergata, Rome, Italy.
    Miscetti, S.
    INFN, Lab Nazl Frascati, Frascati, Italy.
    Moricciani, D.
    INFN, Sez Roma Tor Vergata, Rome, Italy.
    Moskal, R.
    Jagiellonian Univ, Inst Phys, Krakow, Poland.
    Passeri, A.
    INFN, Sez Roma Tre, Rome, Italy.
    Patera, V.
    Univ Sapienza, Dipartimento Sci Base & Appl Ingn, Rome, Italy;INFN, Sez Roma, Rome, Italy.
    del Rio, E. Perez
    INFN, Lab Nazl Frascati, Frascati, Italy.
    Raha, N.
    INFN, Sez Roma Tor Vergata, Rome, Italy.
    Santangelo, R.
    INFN, Lab Nazl Frascati, Frascati, Italy.
    Schioppa, M.
    Univ Calabria, Dipartimento Fis, Arcavacata Di Rende, Italy;INFN, Grp Collegato Cosenza, Arcavacata Di Rende, Italy.
    Selce, A.
    Univ Roma Tre, Dipartimento Matemat & Fis, Rome, Italy;INFN, Sez Roma Tre, Rome, Italy.
    Silarski, M.
    Jagiellonian Univ, Inst Phys, Krakow, Poland.
    Sirghi, F.
    INFN, Lab Nazl Frascati, Frascati, Italy;Horia Hulubei Natl Inst Phys & Nucl Engn, Magurele, Romania.
    Solodov, E. P.
    Budker Inst Nucl Phys, Novosibirsk, Russia;Novosibirsk State Univ, Novosibirsk, Russia.
    Tortora, L.
    INFN, Sez Roma Tre, Rome, Italy.
    Venanzoni, G.
    INFN, Sez Pisa, Pisa, Italy.
    Wislicki, W.
    Natl Ctr Nucl Res, Warsaw, Poland.
    Wolke, Magnus
    Uppsala University, Disciplinary Domain of Science and Technology, Physics, Department of Physics and Astronomy, Nuclear Physics.
    Combined limit on the production of a light gauge boson decaying into mu(+) mu(-) and pi(+) pi(-)2018In: Physics Letters B, ISSN 0370-2693, E-ISSN 1873-2445, Vol. 784, p. 336-341Article in journal (Refereed)
    Abstract [en]

    We searched for the mu(+) mu(-) decay of a light vector gauge boson, also known as dark photon, in the e(+) e(-) -> mu(+) mu(-) gamma(ISR) process by means of the Initial State Radiation (ISR) method. We used 1.93fb(-1) of data collected by the KLOE experiment at the DA Phi NE phi-factory. No structures have been observed over the irreducible mu(+) mu(-) background. A 90% CL limit on the ratio epsilon(2)= alpha'/alpha between the dark coupling constant and the fine structure constant of 3 x 10(-6)-2 x 10(-7) has been set in the dark photon mass region between 519 MeV and 973 MeV. This new limit has been combined with the published result obtained investigating the hypothesis of the dark photon decaying into hadrons in e(+) e(-) -> pi(+) pi(-) gamma(ISR) events. The combined 90% CL limit increases the sensitivity especially in the rho-omega interference region and excludes epsilon(2) greater than (13 - 2) x 10(-7). For dark photon masses greater than 600 MeV the combined limit is lower than 8 x 10(-7) resulting more stringent than present constraints from other experiments.

  • 239. Anastasi, Antonio
    et al.
    Caldeira Balkeståh, Li
    Uppsala University, Disciplinary Domain of Science and Technology, Physics, Department of Physics and Astronomy, Nuclear Physics.
    Cao, Bo
    Uppsala University, Disciplinary Domain of Science and Technology, Physics, Department of Physics and Astronomy, Nuclear Physics.
    Heijkenskjöld, Lena
    Uppsala University, Disciplinary Domain of Science and Technology, Physics, Department of Physics and Astronomy, Nuclear Physics.
    Ikegami Andersson, Walter
    Uppsala University, Disciplinary Domain of Science and Technology, Physics, Department of Physics and Astronomy, Nuclear Physics.
    Johansson, Tord
    Uppsala University, Disciplinary Domain of Science and Technology, Physics, Department of Physics and Astronomy, Nuclear Physics.
    Kupsc, Andrzej
    Uppsala University, Disciplinary Domain of Science and Technology, Physics, Department of Physics and Astronomy, Nuclear Physics.
    Papenbrock, Michael
    Uppsala University, Disciplinary Domain of Science and Technology, Physics, Department of Physics and Astronomy, Nuclear Physics.
    Wolke, Magnus
    Uppsala University, Disciplinary Domain of Science and Technology, Physics, Department of Physics and Astronomy, Nuclear Physics.
    Measurement of the ϕ→π0e+e− transition form factor with the KLOE detector2016In: Physics Letters B, ISSN 0370-2693, E-ISSN 1873-2445, Vol. 757, p. 362-367Article in journal (Refereed)
    Abstract [en]

    A measurement of the vector to pseudoscalar conversion decay ϕ→π0e+e− with the KLOE experiment is presented. A sample of ∼9500 signal events was selected from a data set of 1.7 fb−1 of e+e− collisions at s√∼mϕ collected at the DAΦNE e+e− collider. These events were used to obtain the first measurement of the transition form factor |Fϕπ0(q2)| and a new measurement of the branching ratio of the decay: BR(ϕ→π0e+e−)=(1.35±0.05+0.05−0.10)×10−5. The result improves significantly on previous measurements and is in agreement with theoretical predictions.

  • 240. Archilli, F.
    et al.
    Babusci, D.
    Badoni, D.
    Balwierz, I.
    Bencivenni, G.
    Bini, C.
    Bloise, C.
    Bocci, V.
    Bossi, F.
    Branchini, P.
    Budano, A.
    Bulychjev, S. A.
    Caldeira Balkeståhl, Li
    Uppsala University, Disciplinary Domain of Science and Technology, Physics, Department of Physics and Astronomy, Nuclear Physics.
    Campana, P.
    Capon, G.
    Ceradini, F.
    Ciambrone, P.
    Czerwinski, E.
    Dane, E.
    De Lucia, E.
    De Robertis, G.
    De Santis, A.
    De Zorzi, G.
    Di Domenico, A.
    Di Donato, C.
    Domenici, D.
    Erriquez, O.
    Fanizzi, G.
    Felici, G.
    Fiore, S.
    Franzini, P.
    Gauzzi, P.
    Giardina, G.
    Giovannella, S.
    Gonnella, F.
    Graziani, E.
    Happacher, F.
    Höistad, Bo
    Uppsala University, Disciplinary Domain of Science and Technology, Physics, Department of Physics and Astronomy, Nuclear Physics.
    Iafolla, L.
    Iarocci, E.
    Jacewicz, Marek
    Uppsala University, Disciplinary Domain of Science and Technology, Physics, Department of Physics and Astronomy, High Energy Physics.
    Johansson, Tord
    Uppsala University, Disciplinary Domain of Science and Technology, Physics, Department of Physics and Astronomy, Nuclear Physics.
    Kowalewska, A.
    Kulikov, V.
    Kupsc, Andrzej
    Uppsala University, Disciplinary Domain of Science and Technology, Physics, Department of Physics and Astronomy, Nuclear Physics.
    Lee-Franzini, J.
    Loddo, F.
    Mandaglio, G.
    Martemianov, M.
    Martini, M.
    Mascolo, M.
    Matsyuk, M.
    Messi, R.
    Miscetti, S.
    Morello, G.
    Moricciani, D.
    Moskal, P.
    Nguyen, F.
    Passeri, A.
    Patera, V.
    Longhi, I. Prado
    Ranieri, A.
    Redmer, Christoph F.
    Uppsala University, Disciplinary Domain of Science and Technology, Physics, Department of Physics and Astronomy, Nuclear Physics.
    Santangelo, P.
    Sarra, I.
    Schioppa, M.
    Sciascia, B.