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  • 1. Adlarson, P.
    et al.
    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 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.
    Gullstrom, 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.
    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.
    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.
    Isospin decomposition of the basic double-pionic fusion in the region of the ABC effect2013In: Physics Letters B, ISSN 0370-2693, E-ISSN 1873-2445, Vol. 721, no 4-5, p. 229-236Article in journal (Refereed)
    Abstract [en]

    Exclusive and kinematically complete high-statistics measurements of the basic double-pionic fusion reactions pn -> d pi(0)pi(0), pn -> d pi(+)pi(-) and pp -> d pi(+)pi(0) have been carried out simultaneously over the energy region of the ABC effect using the WASA detector setup at COSY. Whereas the isoscalar reaction part given by the d pi(0)pi(0) channel exhibits the ABC effect, i.e. a low-mass enhancement in the pi pi-invariant mass distribution, as well as the associated resonance structure in the total cross section, the isovector part given by the d pi(+)pi(0) channel shows a smooth behavior consistent with the conventional t-channel Delta Delta process. The d pi(+)pi(-) data are very well reproduced by combining the data for isovector and isoscalar contributions, if the kinematical consequences of the isospin violation due to different masses for charged and neutral pions are taken into account.

  • 2.
    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.

  • 3.
    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.

  • 4.
    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.

  • 5.
    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. 

  • 6.
    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.

  • 7.
    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.

  • 8.
    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.

  • 9.
    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.

  • 10.
    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.

  • 11.
    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.

  • 12.
    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.

  • 13.
    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.

  • 14. 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.
    Sciubba, A.
    Silarski, M.
    Stucci, S.
    Taccini, C.
    Tortora, L.
    Venanzoni, G.
    Versaci, R.
    Wislicki, W.
    Wolke, Magnus
    Uppsala University, Disciplinary Domain of Science and Technology, Physics, Department of Physics and Astronomy, Nuclear Physics.
    Zdebik, J.
    Search for a vector gauge boson in phi meson decays with the KLOE detector KLOE-2 Collaboration2012In: Physics Letters B, ISSN 0370-2693, E-ISSN 1873-2445, Vol. 706, no 4-5, p. 251-255Article in journal (Refereed)
    Abstract [en]

    The existence of a light dark force mediator has been tested with the KLOE detector at DA Phi NE. This particle, called U. is searched for using the decay chain phi -> eta U, eta -> pi(+)pi(-)pi(0), U -> e(+)e(-). No evidence is found in 1.5 fb(-1) of data. The resulting exclusion plot covers the mass range 5 < M-U < 470 MeV, setting an upper limit on the ratio between the U boson coupling constant and the One structure constant, alpha'/alpha, of <= 2 x 10(-5) at 90% C.L. for 50 < M-U < 420 MeV.

  • 15. Babusci, D.
    et al.
    Badoni, D.
    Balwierz-Pytko, I.
    Bencivenni, G.
    Bini, C.
    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.
    Capon, G.
    Ceradini, F.
    Ciambrone, P.
    Curciarello, F.
    Czerwinski, E.
    Dane, E.
    De Leo, V.
    De Lucia, E.
    De Robertis, G.
    De Santis, A.
    De Simone, P.
    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.
    Heijkenskjöld, Lena
    Uppsala University, Disciplinary Domain of Science and Technology, Physics, Department of Physics and Astronomy, Nuclear Physics.
    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.
    Kluge, W.
    Kupsc, Andrzej
    Uppsala University, Disciplinary Domain of Science and Technology, Physics, Department of Physics and Astronomy, Nuclear Physics.
    Lee-Franzini, J.
    Loddo, F.
    Lukin, P.
    Mandaglio, G.
    Martemianov, M.
    Martini, M.
    Mascolo, M.
    Messi, R.
    Miscetti, S.
    Morello, G.
    Moricciani, D.
    Moskal, P.
    Mueller, S.
    Nguyen, F.
    Passeri, A.
    Patera, V.
    Longhi, I. Prado
    Ranieri, A.
    Redmer, C. F.
    Uppsala University, Disciplinary Domain of Science and Technology, Physics, Department of Physics and Astronomy.
    Santangelo, P.
    Sarra, I.
    Schioppa, M.
    Sciascia, B.
    Silarski, M.
    Taccini, C.
    Tortora, L.
    Venanzoni, G.
    Versaci, R.
    Wislicki, W.
    Wolke, Magnus
    Uppsala University, Disciplinary Domain of Science and Technology, Physics, Department of Physics and Astronomy, Nuclear Physics.
    Zdebik, J.
    Precision measurement of sigma (e(+)e(-) -> pi(+)pi(-)gamma)/sigma(e(+)e(-) ->mu(+)mu(-)gamma) and determination of the pi(+)pi(-) contribution to the muon anomaly with the KLOE detector2013In: Physics Letters B, ISSN 0370-2693, E-ISSN 1873-2445, Vol. 720, no 4-5, p. 336-343Article in journal (Refereed)
    Abstract [en]

    We have measured the ratio cr (e(+)e(-) -> pi(+)pi(-)gamma)/sigma(e(+)e(-) -> mu(+)mu(-)gamma), with the KLOE detector at DA Phi NE for a total integrated luminosity of similar to 240 pb(-1). From this ratio we obtain the cross section sigma (e(+)e(-) -> pi(+)pi(-)gamma). From the cross section we determine the pion form factor vertical bar F-pi vertical bar(2) and the two-pion contribution to the muon anomaly a(mu) for 0.592< M-pi pi < 0.975 GeV, Delta(pi pi) a(mu) = (385.1 +/- 1.1(stat) +/- 2.7(sys+theo)) x 10(-10). This result confirms the current discrepancy between the Standard Model calculation and the experimental measurement of the muon anomaly. (c) 2013 Elsevier B.V. All rights reserved.

  • 16. Babusci, D.
    et al.
    Badoni, D.
    Balwierz-Pytko, I.
    Bencivenni, G.
    Bini, C.
    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.
    Capon, G.
    Ceradini, F.
    Ciambrone, P.
    Czerwinski, E.
    Dane, E.
    De Lucia, E.
    De Robertis, G.
    De Santis, A.
    Di Domenico, A.
    Di Donato, C.
    Di Salvo, R.
    Domenici, D.
    Erriquez, O.
    Fanizzi, G.
    Fantini, A.
    Felici, G.
    Fiore, S.
    Franzini, P.
    Gauzzi, P.
    Giardina, G.
    Giovannella, S.
    Gonnella, F.
    Graziani, E.
    Happacher, F.
    Heijkenskjöld, Lena
    Uppsala University, Disciplinary Domain of Science and Technology, Physics, Department of Physics and Astronomy, Nuclear Physics.
    Höistad, Bo
    Uppsala University, Disciplinary Domain of Science and Technology, Physics, Department of Physics and Astronomy, Nuclear Physics.
    Iafolla, L.
    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.
    Kupsc, Andrzej
    Uppsala University, Disciplinary Domain of Science and Technology, Physics, Department of Physics and Astronomy, Nuclear Physics.
    Lee-Franzini, J.
    Leverington, B.
    Loddo, F.
    Loffredo, S.
    Mandaglio, G.
    Martemianov, M.
    Martini, M.
    Mascolo, M.
    Messi, R.
    Miscetti, S.
    Morello, G.
    Moricciani, D.
    Moskal, P.
    Nguyen, F.
    Passeri, A.
    Patera, V.
    Longhi, I. Prado
    Ranieri, A.
    Redmer, C. F.
    Santangelo, P.
    Sarra, I.
    Schioppa, M.
    Sciascia, B.
    Silarski, M.
    Taccini, C.
    Tortora, L.
    Venanzoni, G.
    Wislicki, W.
    Wolke, Magnus
    Uppsala University, Disciplinary Domain of Science and Technology, Physics, Department of Physics and Astronomy, Nuclear Physics.
    Zdebik, J.
    Measurement of eta meson production in gamma gamma interactions and Gamma(eta -> gamma gamma) with the KLOE detector2013In: Journal of High Energy Physics (JHEP), ISSN 1126-6708, E-ISSN 1029-8479, no 1, p. 119-Article in journal (Refereed)
    Abstract [en]

    We present a measurement of eta meson production in photon-photon interactions produced by electron-positron beams colliding with root s = 1 GeV. The measurement is done with the KLOE detector at the phi-factory DA Phi NE with an integrated luminosity of 0.24 fb(-1). The e(+)e(-) -> e(+)e(-)eta cross section is measured without detecting the outgoing electron and positron, selecting the decays eta -> pi(+)pi(-)pi(0) and eta -> pi(0)pi(0)pi(0). The most relevant background is due to e(+)e(-) -> eta gamma when the monochromatic photon escapes detection. The cross section for this process is measured as sigma(e(+)e(-) -> eta gamma) = (856 +/- 8(stat) +/- 16(syst)) pb. The combined result for the e(+)e(-) -> e(+)e(-)eta cross section is sigma(e(+)e(-) -> e(+)e(-)eta) = (32.72 +/- 1.27(stat) +/- 0.70(syst)) pb. From this we derive the partial width Gamma(eta -> gamma gamma) = (520 +/- 20(stat) +/- 13(syst)) eV. This is in agreement with the world average and is the most precise measurement to date.

  • 17. Babusci, D.
    et al.
    Badoni, D.
    Balwierz-Pytko, I.
    Bencivenni, G.
    Bini, C.
    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.
    Capon, G.
    Ceradini, F.
    Ciambrone, R.
    Curciarello, F.
    Czerwiriski, E.
    Dane, E.
    De Leo, V.
    De Lucia, E.
    De Robertis, G.
    De Santis, A.
    Di Domenico, A.
    Di Donato, C.
    Di Salvo, R.
    Domenici, D.
    Erriquez, O.
    Fanizzi, G.
    Fantini, A.
    Felici, G.
    Fiore, S.
    Franzini, P.
    Gauzzi, P.
    Giardina, G.
    Giovannella, S.
    Gonnella, F.
    Graziani, E.
    Happacher, F.
    Heijkenskjöld, Lena
    Uppsala University, Disciplinary Domain of Science and Technology, Physics, Department of Physics and Astronomy, Nuclear Physics.
    Höistad, Bo
    Uppsala University, Disciplinary Domain of Science and Technology, Physics, Department of Physics and Astronomy, Nuclear Physics.
    Iafolla, L.
    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.
    Kacprzak, K.
    Kupsc, Andrzej
    Uppsala University, Disciplinary Domain of Science and Technology, Physics, Department of Physics and Astronomy, Nuclear Physics.
    Lee-Franzini, J.
    Leverington, B.
    Loddo, F.
    Loffredo, S.
    Mandaglio, G.
    Martemianov, M.
    Martini, M.
    Mascolo, M.
    Messi, R.
    Miscetti, S.
    Morello, G.
    Moricciahi, D.
    Moskal, P.
    Nguyen, F.
    Passeriu, A.
    Patera, V.
    Longhi, I. Prado
    Ranieri, A.
    Redmer, C. F.
    Santangelo, P.
    Sarra, I.
    Schioppa, M.
    Sciascia, B.
    Silarski, M.
    Taccini, C.
    Tortora, L.
    Venanzoni, G.
    Wislicki, W.
    Wolke, Magnus
    Uppsala University, Disciplinary Domain of Science and Technology, Physics, Department of Physics and Astronomy, Nuclear Physics.
    Zdebik, J.
    A new limit on the CP violating decay K-S -> 3 pi(0) with the KLOE experiment2013In: Physics Letters B, ISSN 0370-2693, E-ISSN 1873-2445, Vol. 723, no 1-3, p. 54-60Article in journal (Refereed)
    Abstract [en]

    We have carried out a new direct search for the CP violating decay K-S -> 3 pi(0) with 1.7 fb(-1) of e(+)e(-) collisions collected by the KLOE detector at the Phi-factory DA Phi NE. We have searched for this decay in a sample of about 5.9 x 10(8) KSKL events tagging the K-S by means of the K-L interaction in the calorimeter and requiring six prompt photons. With respect to our previous search, the analysis has been improved by increasing of a factor four the tagged sample and by a more effective background rejection of fake K-S tags and spurious clusters. We find no candidates in data and simulated background samples, while we expect 0.12 standard model events. Normalizing to the number of K-S -> 2 pi(0) events in the same sample, we set the upper limit on BR(K-S -> 3 pi(0)) <= 2.6 x 10(-8) at 90% C.L., five times lower than the previous limit. We also set the upper limit on the eta(000) parameter, vertical bar eta(000)vertical bar <= 0.0088 at 90% C.L., improving by a factor two the latest direct measurement. (c) 2013 Elsevier B.V. All rights reserved.

  • 18. Babusci, D.
    et al.
    Badoni, D.
    Balwierz-Pytko, I.
    Bencivenni, G.
    Bini, C.
    Bloise, C.
    Bossi, F.
    Branchini, P.
    Budano, A.
    Balkeståhl, Li Caldeira
    Uppsala University, Disciplinary Domain of Science and Technology, Physics, Department of Physics and Astronomy, Nuclear Physics.
    Capon, G.
    Ceradini, F.
    Ciambrone, P.
    Czerwinski, E.
    Dane, E.
    De Lucia, E.
    De Robertis, G.
    De Santis, A.
    Di Domenico, A.
    Di Donato, C.
    Di Salvo, R.
    Domenici, D.
    Erriquez, O.
    Fanizzi, G.
    Fantini, A.
    Felici, G.
    Fiore, S.
    Franzini, P.
    Gauzzi, P.
    Giardina, G.
    Giovannella, S.
    Gonnella, F.
    Graziani, E.
    Happacher, F.
    Heijkenskjöld, Lena
    Uppsala University, Disciplinary Domain of Science and Technology, Physics, Department of Physics and Astronomy, Nuclear Physics.
    Höistad, Bo
    Uppsala University, Disciplinary Domain of Science and Technology, Physics, Department of Physics and Astronomy, Nuclear Physics.
    Iafolla, L.
    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.
    Kupsc, Andrzej
    Uppsala University, Disciplinary Domain of Science and Technology, Physics, Department of Physics and Astronomy, Nuclear Physics.
    Lee-Franzini, J.
    Leverington, B.
    Loddo, F.
    Loffredo, S.
    Mandaglio, G.
    Martemianov, M.
    Martini, M.
    Mascolo, M.
    Messi, R.
    Miscetti, S.
    Morello, G.
    Moricciani, D.
    Moskal, P.
    Nguyen, F.
    Passeri, A.
    Patera, V.
    Longhi, I. Prado
    Ranieri, A.
    Redmer, C. F.
    Santangelo, P.
    Sarra, I.
    Schioppa, M.
    Sciascia, B.
    Silarski, M.
    Taccini, C.
    Tortora, L.
    Venanzoni, G.
    Wislicki, W.
    Wolke, Magnus
    Uppsala University, Disciplinary Domain of Science and Technology, Physics, Department of Physics and Astronomy, Nuclear Physics.
    Zdebik, J.
    Limit on the production of a light vector gauge boson in phi meson decays with the KLOE detector2013In: Physics Letters B, ISSN 0370-2693, E-ISSN 1873-2445, Vol. 720, no 1-3, p. 111-115Article in journal (Refereed)
    Abstract [en]

    We present a new limit on the production of a light dark-force mediator with the KLOE detector at DA Phi NE. This boson, called U, has been searched for in the decay phi -> eta U, U -> e(+)e(-), analyzing the. decay eta -> pi(0)pi(0)pi(0) in a data sample of 1.7 fb(-1). No structures are observed in the e(+)e(-) invariant mass distribution over the background. This search is combined with a previous result obtained from the decay eta -> pi(+)pi(-)pi(0), increasing the sensitivity. We set an upper limit at 90% C.L. on the ratio between the U boson coupling constant and the fine structure constant of alpha'/alpha < 1.7 x 10(-5) for 30 < M-U < 400 MeV and alpha'/alpha <= 8 x 10(-6) for the sub-region 50 < M-U <210 MeV. This result assumes the Vector Meson Dominance expectations for the phi eta gamma* transition form factor. The dependence of this limit on the transition form factor has also been studied.

  • 19. Babusci, D.
    et al.
    Balwierz-Pytko, I.
    Bencivenni, G.
    Bloise, C.
    Bossi, F.
    Branchini, P.
    Budano, A.
    Balkestahl, L. Caldeira
    Uppsala University, Disciplinary Domain of Science and Technology, Physics, Department of Physics and Astronomy, Nuclear Physics.
    Capon, G.
    Ceradini, F.
    Ciambrone, P.
    Curciarello, F.
    Czerwinski, E.
    Dane, E.
    De Leo, V.
    De Lucia, E.
    De Robertis, G.
    De Santis, A.
    De Simone, P.
    Di Cicco, A.
    Di Domenico, A.
    Di Donato, C.
    Di Salvo, R.
    Domenici, D.
    Erriquez, O.
    Fanizzi, G.
    Fantini, A.
    Felici, G.
    Fiore, S.
    Franzini, P.
    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.
    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.
    Johansson, Tord
    Uppsala University, Disciplinary Domain of Science and Technology, Physics, Department of Physics and Astronomy, Nuclear Physics.
    Kacprzak, K.
    Kaminska, G. D.
    Kupsc, Andrzej
    Uppsala University, Disciplinary Domain of Science and Technology, Physics, Department of Physics and Astronomy, Nuclear Physics.
    Lee-Franzini, J.
    Loddo, F.
    Loffredo, S.
    Mandaglio, G.
    Martemianov, M.
    Martini, M.
    Mascolo, M.
    Messi, R.
    Miscetti, S.
    Morello, G.
    Moricciani, D.
    Moskal, R.
    Nguyen, F.
    Palladino, A.
    Passeri, A.
    Patera, V.
    Longhi, I. Prado
    Ranieri, A.
    Santangelo, R.
    Sarra, I.
    Schioppa, M.
    Sciascia, B.
    Silarski, M.
    Taccini, C.
    Tortora, L.
    Venanzoni, G.
    Wislicki, W.
    Wolke, Magnus
    Uppsala University, Disciplinary Domain of Science and Technology, Physics, Department of Physics and Astronomy, Nuclear Physics.
    Zdebik, J.
    Test of CPT and Lorentz symmetry in entangled neutral kaons with the KLOE experiment2014In: Physics Letters B, ISSN 0370-2693, E-ISSN 1873-2445, Vol. 730, p. 89-94Article in journal (Refereed)
    Abstract [en]

    Neutral kaon pairs produced in phi decays in anti-symmetric entangled state can be exploited to search for violation of CPT symmetry and Lorentz invariance. We present an analysis of the CP-violating process phi -> KSKL -> pi(+)pi(-)pi(+)pi(-) based on 1.7 fb(-1) of data collected by the KLOE experiment at the Frascati phi-factory DA Phi NE. The data are used to perform a Measurement of the CPT-violating parameters Delta a(mu) for neutral kaons in the context of the Standard Model Extension framework. The parameters measured in the reference frame of the fixed stars are: Delta a(0) = (-6.0 +/- 7.7(stat)+/- 3.1(syst)) X 10(-18) GeV, Delta a(x) = (0.9 +/- 1.5(stat)+/- 0.6(syst)) X 10(-18) GeV, Delta a(y) = (-2.0 +/- 1.5(stat)+/- 0.5(syst)) X 10(-18) GeV, Delta a(z) = (3.1 +/- 1.7(stat)+/- 0.5(syst)) X 10(-18) GeV. These are presently the most precise measurements in the quark sector of the Standard Model Extension. (C) 2014 The Authors. Published by Elsevier B.V.

  • 20. Babusci, D.
    et al.
    Balwierz-Pytko, I.
    Bencivenni, G.
    Bloise, C.
    Bossi, F.
    Branchini, P.
    Budano, A.
    Balkeståhl, Li Caldeira
    Uppsala University, Disciplinary Domain of Science and Technology, Physics, Department of Physics and Astronomy, Nuclear Physics.
    Ceradini, F.
    Ciambrone, P.
    Curciarello, F.
    Czerwinski, E.
    Dane, E.
    De Leo, V.
    De Luciah, E.
    De Robertis, G.
    De Santis, A.
    De Simone, P.
    Di Cicco, A.
    Di Domenico, A.
    Di Salvo, R.
    Domenici, D.
    Erriqueza, O.
    Fanizzia, G.
    Fantinio, A.
    Felici, G.
    Fiore, S.
    Franzini, P.
    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.
    Höistad, Bo
    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.
    Lee-Franzini, J.
    Loddo, F.
    Loffredo, S.
    Mandaglio, G.
    Martemianov, M.
    Martini, M.
    Mascolo, M.
    Messi, R.
    Miscetti, S.
    Morello, G.
    Moricciani, D.
    Moskal, P.
    Palladino, A.
    Passeri, A.
    Patera, V.
    Longhi, I. Prado
    Ranieri, A.
    Santangelo, P.
    Sarra, I.
    Schioppa, M.
    Sciascia, B.
    Silarski, M.
    Tortora, L.
    Venanzoni, G.
    Wislicki, W.
    Wolke, Magnus
    Uppsala University, Disciplinary Domain of Science and Technology, Physics, Department of Physics and Astronomy, Nuclear Physics.
    Study of the Dalitz decay phi -> eta e(+)e(-) with the KLOE detector2015In: Physics Letters B, ISSN 0370-2693, E-ISSN 1873-2445, Vol. 742, p. 1-6Article in journal (Refereed)
    Abstract [en]

    We have studied the vector to pseudoscalar conversion decay phi -> eta e(+)e(-), with.. eta -> pi(0)pi(0)pi(0), with the KLOE detector at DA phi NE. The data set of 1.7 fb(-1) of e(+)e(-) collisions at root s similar to M-phi contains a clear conversion decay signal of similar to 31,000 events from which we measured a value of BR(phi -> eta e(+)e-) = (1.075 +/- 0.007 +/- 0.038) x 10(-4). The same sample is used to determine the transition form factor by a fit to the e(+)e(-) invariant mass spectrum, obtaining b(phi eta)=( 1.28 +/- 0.10(-0.08)(+0.09)) GeV-2, that improves by a factor of five the precision of the previous measurement and is in good agreement with VMD expectations.

  • 21. Babusci, D.
    et al.
    Czyż, H.
    Gonnella, F.
    Ivashyn, S.
    Mascolo, M.
    Messi, R.
    Moricciani, D.
    Nyffeler, A.
    Venanzoni, G.
    Caldeira Balkeståh, Li
    Uppsala University, Disciplinary Domain of Science and Technology, Physics, Department of Physics and Astronomy, Nuclear Physics.
    Höistad, Bo
    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.
    Redmer, Christoph
    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.
    On the possibility to measure the π 0→γγ decay width and the γ ∗ γ→π 0 transition form factor with the KLOE-2 experiment2012In: European Physical Journal C, ISSN 1434-6044, E-ISSN 1434-6052, Vol. 72, no 3, p. 1917-Article in journal (Refereed)
  • 22. Babuscih, D.
    et al.
    Balwierz-Pytkog, I.
    Bencivenni, G.
    Bloise, C.
    Bossi, F.
    Branchinir, P.
    Budano, A.
    Balkeståhl, Li Caldeira
    Uppsala University, Disciplinary Domain of Science and Technology, Physics, Department of Physics and Astronomy, Nuclear Physics.
    Ceradini, F.
    Ciambrone, P.
    Curciarello, F.
    Czerwinski, E.
    Dane, E.
    De Leo, V.
    De Lucia, E.
    De Robertis, G.
    De Santis, A.
    De Simone, P.
    Di Cicco, A.
    Di Domenico, A.
    Di Salvo, R.
    Domenici, D.
    Erriquez, O.
    Fanizzi, G.
    Fantini, A.
    Felici, G.
    Fiore, S.
    Franzini, P.
    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.
    Höistad, Bo
    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.
    Lee-Franzini, J.
    Loddo, F.
    Loffredo, S.
    Mandaglio, G.
    Martemianov, M.
    Martini, M.
    Mascolo, M.
    Messi, R.
    Miscetti, S.
    Morello, G.
    Moricciani, D.
    Moskal, P.
    Palladino, A.
    Passeri, A.
    Patera, V.
    Longhi, I. Prado
    Ranieri, A.
    Santangelo, P.
    Sarra, I.
    Schioppa, M.
    Sciascia, B.
    Silarski, M.
    Tortora, L.
    Venanzoni, G.
    Wislicki, W.
    Wolke, Magnus
    Uppsala University, Disciplinary Domain of Science and Technology, Physics, Department of Physics and Astronomy, Nuclear Physics.
    Measurement of the absolute branching ratio of the K+ -> pi(+) pi(-) pi(+) (gamma) decay with the KLOE detector2014In: Physics Letters B, ISSN 0370-2693, E-ISSN 1873-2445, Vol. 738, p. 128-133Article in journal (Refereed)
    Abstract [en]

    The absolute branching ratio of the K+ -> pi(+) pi(-) pi(+) (gamma) decay, inclusive of final-state radiation, has been measured using similar to 17 million tagged K+ mesons collected with the KLOE detector at DA Phi NE, the Frascati phi-factory. The result is: BR(K+ -> pi(+) pi(-) pi(+) (gamma)) = 0.05565 +/- 0.00031(stat) +/- 0.00025(syst) a factor similar or equal to 5 more precise with respect to the previous result. This work completes the program of precision measurements of the dominant kaon branching ratios at KLOE.

  • 23. Bargholtz, Chr.
    et al.
    Bashkanov, M.
    Berlowski, M.
    Bondar, A.
    Bogoslawsky, D.
    Brodowski, W.
    Brudvik, J.
    Calén, Hans
    Uppsala University, The Svedberg Laboratory.
    Capellaro, Filippo
    Uppsala University, Disciplinary Domain of Science and Technology, Physics, Department of Nuclear and Particle Physics.
    Chilingarov, A.
    Clement, H.
    Comfort, J.
    Demiroers, L.
    Ekström, Curt
    Uppsala University, The Svedberg Laboratory.
    Fransson, Kjell
    Uppsala University, The Svedberg Laboratory.
    Fridén, Carl-Johan
    Uppsala University, The Svedberg Laboratory.
    Geren, L.
    Gornov, M.
    Grebenev, V.
    Greiff, J.
    Gurov, Y.
    Gustafsson, Leif
    Uppsala University, Disciplinary Domain of Science and Technology, Physics, Department of Nuclear and Particle Physics.
    Höistad, Bo
    Uppsala University, Disciplinary Domain of Science and Technology, Physics, Department of Nuclear and Particle Physics.
    Ivanov, G.
    Jacewicz, Marek
    Uppsala University, Disciplinary Domain of Science and Technology, Physics, Department of Nuclear and Particle Physics.
    Jiganov, E.
    Johansson, A.
    Uppsala University, Disciplinary Domain of Science and Technology, Physics, Department of Nuclear and Particle Physics.
    Johansson, Tord
    Uppsala University, Disciplinary Domain of Science and Technology, Physics, Department of Nuclear and Particle Physics.
    Keleta, S.
    Uppsala University, Disciplinary Domain of Science and Technology, Physics, Department of Nuclear and Particle Physics.
    Khakimova, O.
    Khoukaz, A.
    Kilian, K.
    Kimura, N.
    Koch, I.
    Uppsala University, Disciplinary Domain of Science and Technology, Physics, Department of Nuclear and Particle Physics.
    Kolachev, G.
    Kren, F.
    Kullander, Sven
    Uppsala University, Disciplinary Domain of Science and Technology, Physics, Department of Nuclear and Particle Physics.
    Kupsc, Andrzej
    Uppsala University, Disciplinary Domain of Science and Technology, Physics, Department of Nuclear and Particle Physics.
    Kuzmin, A.
    Kuznetsov, A.
    Lindberg, K.
    Marciniewski, Pawel
    Uppsala University, Disciplinary Domain of Science and Technology, Physics, Department of Nuclear and Particle Physics.
    Meier, R.
    Messner, O.
    Morosov, B.
    Nawrot, A.
    Nefkens, B. M. K.
    Norman, G.
    Uppsala University, The Svedberg Laboratory.
    Oelert, W.
    Pauly, C.
    Pettersson, H.
    Uppsala University, Disciplinary Domain of Science and Technology, Physics, Department of Nuclear and Particle Physics.
    Pivovarov, A.
    Patzold, J.
    Petukhov, Y.
    Povtorejko, A.
    Reistad, Dag
    Uppsala University, The Svedberg Laboratory.
    Ruber, Roger J. M. Y.
    Uppsala University, Disciplinary Domain of Science and Technology, Physics, Department of Nuclear and Particle Physics.
    Sandukovsky, S.
    Schönning, Karin
    Uppsala University, Disciplinary Domain of Science and Technology, Physics, Department of Nuclear and Particle Physics.
    Scobel, W.
    Sefzick, T.
    Shafigullin, R.
    Shwartz, B.
    Sidorov, V.
    Skorodko, T.
    Sopov, V.
    Starostin, A.
    Stepaniak, J.
    Sukhanov, A.
    Sukhanov, A.
    Tchernyshev, V.
    Tegner, P-E
    Engblom, P. Thorngren
    Uppsala University, Disciplinary Domain of Science and Technology, Physics, Department of Nuclear and Particle Physics.
    Tikhomirov, V.
    Toki, H.
    Turowiecki, A.
    Wagner, G. J.
    Wiedner, Ulrich
    Uppsala University, Disciplinary Domain of Science and Technology, Physics, Department of Nuclear and Particle Physics.
    Wilhelmi, Z.
    Wolke, M.
    Yamamoto, A.
    Yamaoka, H.
    Zabierowski, J.
    Zartova, I.
    Zlomanczuk, Josef
    Uppsala University, Disciplinary Domain of Science and Technology, Physics, Department of Nuclear and Particle Physics.
    The WASA detector facility at CELSIUS2008In: Nuclear Instruments and Methods in Physics Research Section A: Accelerators, Spectrometers, Detectors and Associated Equipment, ISSN 0168-9002, E-ISSN 1872-9576, Vol. 594, no 3, p. 339-350Article in journal (Refereed)
    Abstract [en]

    The WASA 4 pi multidetector system, aimed at investigating light meson production in light ion collisions and eta meson rare decays at the CELSIUS storage ring in Uppsala is presented. A unique feature of the system is the use of hydrogen pellets as internal targets for the first time. A detailed description of the design, together with the anticipated and achieved performance parameters are given. (C) 2008 Elsevier B.V. All rights reserved.

  • 24. Bashkanov, M.
    et al.
    Abdel-Samad, S.
    Brinkmann, K.
    Calen, Hans
    Uppsala University, Interfaculty Units, The Svedberg Laboratory.
    Capellaro, Filippo
    Teknisk-naturvetenskapliga vetenskapsområdet, Physics, Department of Nuclear and Particle Physics.
    Clement, H.
    Demiroers, L.
    Doroshkevich, E.
    Dshemuchadse, S.
    Ekström, Curt
    Uppsala University, Interfaculty Units, The Svedberg Laboratory.
    Erhardt, A.
    Eyrich, W.
    Fransson, Kjell
    Uppsala University, Interfaculty Units, The Svedberg Laboratory.
    Freiesleben, H.
    Fritch, M.
    Gillitzer, G.
    Gustafsson, Leif
    Teknisk-naturvetenskapliga vetenskapsområdet, Physics, Department of Nuclear and Particle Physics.
    Höistad, Bo
    Teknisk-naturvetenskapliga vetenskapsområdet, Physics, Department of Nuclear and Particle Physics.
    Jacewicz, Marek
    Teknisk-naturvetenskapliga vetenskapsområdet, Physics, Department of Nuclear and Particle Physics.
    Johansson, Tord
    Teknisk-naturvetenskapliga vetenskapsområdet, Physics, Department of Nuclear and Particle Physics.
    Karsch, L.
    Keleta, Samson
    Teknisk-naturvetenskapliga vetenskapsområdet, Physics, Department of Nuclear and Particle Physics.
    Kilian, K.
    Koch, Inken
    Teknisk-naturvetenskapliga vetenskapsområdet, Physics, Department of Nuclear and Particle Physics.
    Kress, J.
    Kuhlmann, E.
    Kullander, Sven
    Teknisk-naturvetenskapliga vetenskapsområdet, Physics, Department of Nuclear and Particle Physics.
    Kupsc, Andrzej
    Uppsala University, Interfaculty Units, The Svedberg Laboratory.
    Marcello, S.
    Marciniewski, Pawel
    Uppsala University, Interfaculty Units, The Svedberg Laboratory.
    Meier, R.
    Möller, K.
    Morozov, B.
    Teknisk-naturvetenskapliga vetenskapsområdet, Physics, Department of Nuclear and Particle Physics.
    Morsch, H.P.
    Pauli, C.
    Pethukov, Y.
    Rodenburg, E.
    Schönmeier, P.
    Schroder, W.
    Schulte-Wissermann, M.
    Scobel, W.
    Sefzick, T.
    Skorodko, T.
    Stepaniak, J.
    Wagner, G.J.
    Wagner, M.
    Wiedner, Ulrich
    Teknisk-naturvetenskapliga vetenskapsområdet, Physics, Department of Nuclear and Particle Physics.
    Wintz, P.
    Wuestner, P.
    Zabierowski, J.
    Zlomanczuk, Jozef
    Teknisk-naturvetenskapliga vetenskapsområdet, Physics, Department of Nuclear and Particle Physics.
    Zupranski, P.
    Two-pion production in proton-proton collisions2004In: Hadron Spectroscopy, Tenth International Conference on Hadron Spectrscopy, Aschaffenburg, Germany 31 August - 6 September 2003, 2004, p. 241-244Conference paper (Other scientific)
  • 25. Bashkanov, M.
    et al.
    Bogoslawsky, D.
    Calén, Hans
    Uppsala University, The Svedberg Laboratory.
    Capellaro, Filippo
    Uppsala University, Disciplinary Domain of Science and Technology, Physics, Department of Nuclear and Particle Physics.
    Clement, H.
    Demirörs, L.
    Ekström, Curt
    Uppsala University, The Svedberg Laboratory.
    Fransson, Kjell
    Uppsala University, The Svedberg Laboratory.
    Gustafsson, Leif
    Uppsala University, Disciplinary Domain of Science and Technology, Physics, Department of Nuclear and Particle Physics.
    Höistad, Bo
    Uppsala University, Disciplinary Domain of Science and Technology, Physics, Department of Nuclear and Particle Physics.
    Ivanov, G.
    Jacewicz, Marek
    Uppsala University, Disciplinary Domain of Science and Technology, Physics, Department of Nuclear and Particle Physics.
    Jiganov, E.
    Johansson, Tord
    Uppsala University, Disciplinary Domain of Science and Technology, Physics, Department of Nuclear and Particle Physics.
    Keleta, Samson
    Uppsala University, Disciplinary Domain of Science and Technology, Physics, Department of Nuclear and Particle Physics.
    Koch, Inken
    Uppsala University, Disciplinary Domain of Science and Technology, Physics, Department of Physics and Astronomy, Nuclear and Particle Physics.
    Kullander, Sven
    Uppsala University, Disciplinary Domain of Science and Technology, Physics, Department of Nuclear and Particle Physics.
    Kupsc, Andrzej
    Uppsala University, The Svedberg Laboratory.
    Kuznetsov, A.
    Marciniewski, Pawel
    Uppsala University, The Svedberg Laboratory.
    Meier, R.
    Morosov, B.
    Oelert, W.
    Pauly, C.
    Petukhov, Y.
    Pettersson, Henrik
    Uppsala University, Disciplinary Domain of Science and Technology, Physics, Department of Nuclear and Particle Physics.
    Povtorejko, A.
    Ruber, Roger J. M. Y.
    Uppsala University, The Svedberg Laboratory.
    Schönning, Karin
    Uppsala University, Disciplinary Domain of Science and Technology, Physics, Department of Nuclear and Particle Physics.
    Scobel, W.
    Skorodko, T.
    Shwartz, B.
    Sopov, V.
    Stepaniak, J.
    Tchernyshev, V.
    Thörngren Engblom, Pia
    Uppsala University, Disciplinary Domain of Science and Technology, Physics, Department of Nuclear and Particle Physics.
    Tikhomirov, V.
    Turowiecki, A.
    Wagner, G.J.
    Wiedner, Ulrich
    Uppsala University, Disciplinary Domain of Science and Technology, Physics, Department of Nuclear and Particle Physics.
    Wolke, Magnus
    Uppsala University, Disciplinary Domain of Science and Technology, Physics, Department of Nuclear and Particle Physics.
    Yamamoto, A.
    Zabierowski, J.
    Zlomanczuk, Jozef
    Uppsala University, Disciplinary Domain of Science and Technology, Physics, Department of Nuclear and Particle Physics.
    Measurement of the slope parameter for the η → 3π0 decay in the pp → ppη reaction2007In: Physical Review C. Nuclear Physics, ISSN 0556-2813, E-ISSN 1089-490X, Vol. 76, no 4, p. 048201-Article in journal (Refereed)
    Abstract [en]

    The CELSIUS-WASA setup is used to measure the 3π0 decay of η mesons produced in pp interactions with beam kinetic energies of 1.36 and 1.45 GeV. The efficiency-corrected Dalitz plot and density distributions for this decay are shown, together with a fit of the quadratic slope parameter α yielding α = −0.026 ± 0.010(stat) ± 0.010(syst). This value is compared to recent experimental results and theoretical predictions.

  • 26.
    Bashkanov, M.
    et al.
    Physikalisches Institut der Universität Tübingen, D-72076 Tübingen, Germany.
    Bogoslawsky, D.
    Joint Institute for Nuclear Research, Dubna, Russia.
    Calén, Hans
    Uppsala University, The Svedberg Laboratory.
    Cappellaro, F.
    Uppsala University, Disciplinary Domain of Science and Technology, Physics, Department of Nuclear and Particle Physics, Nuclear Physics.
    Clement, H.
    Physikalisches Institut der Universität Tübingen, D-72076 Tübingen, Germany.
    Demiroers, L.
    Hamburg University, Hamburg, Germany.
    Ekström, Curt
    Uppsala University, The Svedberg Laboratory.
    Fransson, Kjell
    Uppsala University, The Svedberg Laboratory.
    Greiff, J.
    Uppsala University, The Svedberg Laboratory.
    Gustafsson, Leif
    Uppsala University, Disciplinary Domain of Science and Technology, Physics, Department of Nuclear and Particle Physics, Nuclear Physics.
    Höistad, Bo
    Uppsala University, Disciplinary Domain of Science and Technology, Physics, Department of Nuclear and Particle Physics, Nuclear Physics.
    Ivanov, G.
    Joint Institute for Nuclear Research, Dubna, Russia.
    Jacewicz, Marek
    Uppsala University, Disciplinary Domain of Science and Technology, Physics, Department of Nuclear and Particle Physics, Nuclear Physics.
    Jiganov, E.
    Joint Institute for Nuclear Research, Dubna, Russia.
    Johansson, Tord
    Uppsala University, Disciplinary Domain of Science and Technology, Physics, Department of Nuclear and Particle Physics, Nuclear Physics.
    Khakimova, O.
    Physikalisches Institut der Universität Tübingen, D-72076 Tübingen, Germany.
    Kaskulov, M. M.
    Physikalisches Institut der Universität Tübingen, D-72076 Tübingen, Germany.
    Keleta, Samson
    Uppsala University, Disciplinary Domain of Science and Technology, Physics, Department of Nuclear and Particle Physics, Nuclear Physics.
    Koch, I.
    Uppsala University, Disciplinary Domain of Science and Technology, Physics, Department of Nuclear and Particle Physics, Nuclear Physics.
    Kren, F.
    Physikalisches Institut der Universität Tübingen, D-72076 Tübingen, Germany.
    Kullander, Sven
    Uppsala University, Disciplinary Domain of Science and Technology, Physics, Department of Nuclear and Particle Physics, Nuclear Physics.
    Kupsc, Andrzej
    Uppsala University, The Svedberg Laboratory.
    Kuznetsov, A.
    Joint Institute for Nuclear Research, Dubna, Russia.
    Marciniewski, Pawel
    Uppsala University, The Svedberg Laboratory.
    Meier, R.
    Physikalisches Institut der Universität Tübingen, D-72076 Tübingen, Germany.
    Morosov, B.
    Joint Institute for Nuclear Research, Dubna, Russia.
    Oelert, W.
    Forschungszentrum Jülich, Germany.
    Pauly, C.
    Hamburg University, Hamburg, Germany.
    Petukho, Y.
    Joint Institute for Nuclear Research, Dubna, Russia.
    Povtorejko, A.
    Joint Institute for Nuclear Research, Dubna, Russia.
    Ruber, Roger
    Uppsala University, The Svedberg Laboratory.
    Scobel, W.
    Hamburg University, Hamburg, Germany.
    Skorodko, T.
    Physikalisches Institut der Universität Tübingen, D-72076 Tübingen, Germany.
    Shwartz, B.
    Budker Institute of Nuclear Physics, Novosibirsk, Russia.
    Sopov, V.
    Institute of Theoretical and Experimental Physics, Moscow, Russia.
    Stepaniak, J.
    Soltan Institute of Nuclear Studies, Warsaw and Lodz, Poland.
    Tchernyshev, V.
    Institute of Theoretical and Experimental Physics, Moscow, Russia.
    Thorngren-Engblom, Pia
    Uppsala University, Disciplinary Domain of Science and Technology, Physics, Department of Nuclear and Particle Physics, Nuclear Physics.
    Tikhomirov, V.
    Joint Institute for Nuclear Research, Dubna, Russia.
    Turowiecki, A.
    Institute of Experimental Physics, Warsaw, Poland.
    Wagner, G. J.
    Physikalisches Institut der Universität Tübingen, D-72076 Tübingen, Germany.
    Wolke, Magnus
    Uppsala University, Disciplinary Domain of Science and Technology, Physics, Department of Nuclear and Particle Physics, Nuclear Physics.
    Yamamoto, A.
    High Energy Accelerator Research Organization, Tsukuba, Japan.
    Zabierowski, J.
    Soltan Institute of Nuclear Studies, Warsaw and Lodz, Poland.
    Zlomanczuk, Jozef
    Uppsala University, Disciplinary Domain of Science and Technology, Physics, Department of Nuclear and Particle Physics, Nuclear Physics.
    Exclusive measurements of pd -> He-3 pi pi: The ABC effect revisited2006In: Physics Letters B, ISSN 0370-2693, E-ISSN 1873-2445, Vol. 637, no 4-5, p. 223-228Article in journal (Refereed)
    Abstract [en]

    Exclusive measurements of the reactions pd -> He-3 pi(+)7 pi(-) and pd -> He-3 pi(0)pi(0) have been carried out at T-p = 0.893 GeV at the CELSIUS storage ring using the WASA detector. The pi(+)pi(-) channel evidences a pronounced enhancement at low invariant pi pi masses-as anticipated from previous inclusive measurements of the ABC effect. This enhancement is seen to be even much larger in the isoscalar pi(0)pi(0) channel. The differential distributions prove this enhancement to be of scalar-isoscalar nature. Delta Delta calculations give a good description of the data, if a boundstate condition is imposed for the intermediate Delta Delta system.

  • 27.
    Bashkanov, M.
    et al.
    Physikalisches Institut, Universität Tübingen.
    Calèn, Hans
    Uppsala University, The Svedberg Laboratory.
    Cappellaro, F.
    Uppsala University, Disciplinary Domain of Science and Technology, Physics, Department of Nuclear and Particle Physics.
    Ekström, Curt
    Uppsala University, The Svedberg Laboratory.
    Fransson, Kjell
    Uppsala University, The Svedberg Laboratory.
    Gustafsson, Leif
    Uppsala University, Disciplinary Domain of Science and Technology, Physics, Department of Nuclear and Particle Physics.
    Höistad, Bo
    Uppsala University, Disciplinary Domain of Science and Technology, Physics, Department of Nuclear and Particle Physics.
    Jacewicz, Marek
    Uppsala University, Disciplinary Domain of Science and Technology, Physics, Department of Nuclear and Particle Physics.
    Johansson, Tord
    Uppsala University, Disciplinary Domain of Science and Technology, Physics, Department of Nuclear and Particle Physics.
    Keleta, Samson
    Uppsala University, Disciplinary Domain of Science and Technology, Physics, Department of Nuclear and Particle Physics.
    Koch, I.
    Uppsala University, Disciplinary Domain of Science and Technology, Physics, Department of Nuclear and Particle Physics.
    Kullander, Sven
    Uppsala University, Disciplinary Domain of Science and Technology, Physics, Department of Nuclear and Particle Physics.
    Kupść, Andrzej
    Uppsala University, The Svedberg Laboratory.
    Marciniewski, Pawel
    Uppsala University, The Svedberg Laboratory.
    Ruber, Roger
    Uppsala University, The Svedberg Laboratory.
    Thörngren-Engblom, Pia
    Uppsala University, The Svedberg Laboratory.
    Wolke, Magnus
    Uppsala University, Disciplinary Domain of Science and Technology, Physics, Department of Nuclear and Particle Physics.
    Zlomanczuk, Jozef
    Uppsala University, Disciplinary Domain of Science and Technology, Physics, Department of Nuclear and Particle Physics.
    Low-mass pi pi enhancement in baryonic pi pi production: ABC effect revised by exclusive measurements2007In: International Journal of Modern Physics A, ISSN 0217-751X, E-ISSN 1793-656X, Vol. 22, no 2-3, p. 625-628Article in journal (Refereed)
    Abstract [en]

    The ABC effect - a puzzling threshold enhancement in the ππ invariant mass spectrum of double-pionic fusion to nuclear bound states - has been investigated since 40 years by inclusive measurements without providing a conclusive interpretation. First exclusive measurements to this topic have now been carried out at CELSIUS-WASA. They confirm a huge ππ threshold enhancement, prove it to be of scalar-isoscalar nature, i.e., a σ-channel phenomenon and reveal the theoretically predicted high-mass enhancement in inclusive spectra to be of πππ rather than of ππ nature - falsifying thus corresponding model predictions for the ABC effect. From the kinematically complete data samples we infer that the interaction between the two Δ particles created in this process is of crucial importance.

  • 28. Bilger, Ralph
    et al.
    Brodowski, Wolfram
    Calén, Hans
    Uppsala University, Interfaculty Units, The Svedberg Laboratory.
    Clement, Heinz
    Ekström, Curt
    Uppsala University, Interfaculty Units, The Svedberg Laboratory.
    Fransson, Kjell
    Uppsala University, Interfaculty Units, The Svedberg Laboratory.
    Fäldt, Göran
    Teknisk-naturvetenskapliga vetenskapsområdet, Physics, Department of Nuclear and Particle Physics.
    Gustafsson, Leif
    Teknisk-naturvetenskapliga vetenskapsområdet, Physics, Department of Nuclear and Particle Physics.
    Höistad, Bo
    Teknisk-naturvetenskapliga vetenskapsområdet, Physics, Department of Nuclear and Particle Physics.
    Johansson, Arne
    Teknisk-naturvetenskapliga vetenskapsområdet, Physics, Department of Nuclear and Particle Physics.
    Johansson, Tord
    Teknisk-naturvetenskapliga vetenskapsområdet, Physics, Department of Nuclear and Particle Physics.
    Kilian, Kurt
    Kullander, Sven
    Teknisk-naturvetenskapliga vetenskapsområdet, Physics, Department of Nuclear and Particle Physics.
    Kupsc, Andrzej
    Uppsala University, Interfaculty Units, The Svedberg Laboratory.
    Kurz, G.
    Marciniewski, Pawel
    Uppsala University, Interfaculty Units, The Svedberg Laboratory.
    Morozov, B.
    Teknisk-naturvetenskapliga vetenskapsområdet, Physics, Department of Nuclear and Particle Physics.
    Mörtsell, A.
    Teknisk-naturvetenskapliga vetenskapsområdet, Physics, Department of Nuclear and Particle Physics.
    Oelert, W.
    Renken, V.
    Ruber, R.
    Uppsala University, Interfaculty Units, The Svedberg Laboratory.
    Shwartz, B.
    Sopov, V.
    Stepaniak, J.
    Sukhanov, A.
    Thörngren-Engblom, Pia
    Teknisk-naturvetenskapliga vetenskapsområdet, Physics, Department of Nuclear and Particle Physics.
    Turowiecki, Adam
    Wagner, G.J.
    Wilhelmi, Z.
    Wilkin, C.
    Zabierowski, J.
    Zlomanczuk, Jozef
    Teknisk-naturvetenskapliga vetenskapsområdet, Physics, Department of Nuclear and Particle Physics.
    Measurement of the pd -> pd eta Cross Section in Complete Kinematics2004In: Phys. Rev., Vol. C69, p. 014003-Article in journal (Refereed)
  • 29.
    Calen, Hans
    et al.
    Uppsala University, Teknisk-naturvetenskapliga vetenskapsområdet, Physics, Department of Nuclear and Particle Physics. Department of Physics and Astronomy, Nuclear Physics.
    Fransson, Kjell
    Uppsala University, Teknisk-naturvetenskapliga vetenskapsområdet, Physics, Department of Nuclear and Particle Physics. Department of Physics and Astronomy, Nuclear Physics.
    Gustafsson, Leif
    Uppsala University, Teknisk-naturvetenskapliga vetenskapsområdet, Physics, Department of Nuclear and Particle Physics. Department of Physics and Astronomy, Nuclear Physics.
    Hoistad, Bo
    Uppsala University, Teknisk-naturvetenskapliga vetenskapsområdet, Physics, Department of Nuclear and Particle Physics. Department of Physics and Astronomy, Nuclear Physics.
    Jacewicz, Marek
    Uppsala University, Teknisk-naturvetenskapliga vetenskapsområdet, Physics, Department of Nuclear and Particle Physics. Department of Physics and Astronomy, Nuclear Physics.
    Johansson, Tord
    Uppsala University, Teknisk-naturvetenskapliga vetenskapsområdet, Physics, Department of Nuclear and Particle Physics. Department of Physics and Astronomy, Nuclear Physics.
    Keleta, Samson
    Uppsala University, Teknisk-naturvetenskapliga vetenskapsområdet, Physics, Department of Nuclear and Particle Physics. Department of Physics and Astronomy, Nuclear Physics.
    Kullander, Sven
    Uppsala University, Teknisk-naturvetenskapliga vetenskapsområdet, Physics, Department of Nuclear and Particle Physics. Department of Physics and Astronomy, Nuclear Physics.
    Kupsc, Andrzej
    Uppsala University, Teknisk-naturvetenskapliga vetenskapsområdet, Physics, Department of Nuclear and Particle Physics. Department of Physics and Astronomy, Nuclear Physics.
    Marciniewski, Pawel
    Uppsala University, Teknisk-naturvetenskapliga vetenskapsområdet, Physics, Department of Nuclear and Particle Physics. Department of Physics and Astronomy, Nuclear Physics.
    Petterson, Henrik
    Uppsala University, Teknisk-naturvetenskapliga vetenskapsområdet, Physics, Department of Nuclear and Particle Physics. Department of Physics and Astronomy, Nuclear Physics.
    Schonning, Karin
    Uppsala University, Teknisk-naturvetenskapliga vetenskapsområdet, Physics, Department of Nuclear and Particle Physics. Department of Physics and Astronomy, Nuclear Physics.
    Thorngren, Pia
    Uppsala University, Teknisk-naturvetenskapliga vetenskapsområdet, Physics, Department of Nuclear and Particle Physics. Department of Physics and Astronomy, Nuclear Physics.
    Zlomanczuk, Jozef
    Uppsala University, Teknisk-naturvetenskapliga vetenskapsområdet, Physics, Department of Nuclear and Particle Physics. Department of Physics and Astronomy, Nuclear Physics.
    Evidence for a 'Narrow' Roper Resonance - The Breathing Mode of the Nucleon2006Report (Other scientific)
  • 30.
    Calen, Hans
    et al.
    Uppsala University, Teknisk-naturvetenskapliga vetenskapsområdet, Physics, Department of Nuclear and Particle Physics. Department of Physics and Astronomy, Nuclear Physics.
    Fransson, Kjell
    Uppsala University, Teknisk-naturvetenskapliga vetenskapsområdet, Physics, Department of Nuclear and Particle Physics. Department of Physics and Astronomy, Nuclear Physics.
    Gustafsson, Leif
    Uppsala University, Teknisk-naturvetenskapliga vetenskapsområdet, Physics, Department of Nuclear and Particle Physics. Department of Physics and Astronomy, Nuclear Physics.
    Hoistad, Bo
    Uppsala University, Teknisk-naturvetenskapliga vetenskapsområdet, Physics, Department of Nuclear and Particle Physics. Department of Physics and Astronomy, Nuclear Physics.
    Jacewicz, Marek
    Uppsala University, Teknisk-naturvetenskapliga vetenskapsområdet, Physics, Department of Nuclear and Particle Physics. Department of Physics and Astronomy, Nuclear Physics.
    Johansson, Tord
    Uppsala University, Teknisk-naturvetenskapliga vetenskapsområdet, Physics, Department of Nuclear and Particle Physics. Department of Physics and Astronomy, Nuclear Physics.
    Keleta, Samson
    Uppsala University, Teknisk-naturvetenskapliga vetenskapsområdet, Physics, Department of Nuclear and Particle Physics. Department of Physics and Astronomy, Nuclear Physics.
    Kullander, Sven
    Uppsala University, Teknisk-naturvetenskapliga vetenskapsområdet, Physics, Department of Nuclear and Particle Physics. Department of Physics and Astronomy, Nuclear Physics.
    Kupsc, Andrzej
    Uppsala University, Teknisk-naturvetenskapliga vetenskapsområdet, Physics, Department of Nuclear and Particle Physics. Department of Physics and Astronomy, Nuclear Physics.
    Marciniewski, Pawel
    Uppsala University, Teknisk-naturvetenskapliga vetenskapsområdet, Physics, Department of Nuclear and Particle Physics. Department of Physics and Astronomy, Nuclear Physics.
    Petterson, Henrik
    Uppsala University, Teknisk-naturvetenskapliga vetenskapsområdet, Physics, Department of Nuclear and Particle Physics. Department of Physics and Astronomy, Nuclear Physics.
    Schonning, Karin
    Uppsala University, Teknisk-naturvetenskapliga vetenskapsområdet, Physics, Department of Nuclear and Particle Physics. Department of Physics and Astronomy, Nuclear Physics.
    Thorngren, Pia
    Uppsala University, Teknisk-naturvetenskapliga vetenskapsområdet, Physics, Department of Nuclear and Particle Physics. Department of Physics and Astronomy, Nuclear Physics.
    Zlomanczuk, Jozef
    Uppsala University, Teknisk-naturvetenskapliga vetenskapsområdet, Physics, Department of Nuclear and Particle Physics. Department of Physics and Astronomy, Nuclear Physics.
    Measurement of the eta->pi+ pi- e+ e- decay branching ration2006Report (Other scientific)
  • 31.
    Calen, Hans
    et al.
    Uppsala University, Teknisk-naturvetenskapliga vetenskapsområdet, Physics, Department of Nuclear and Particle Physics. Department of Physics and Astronomy, Nuclear Physics.
    Fransson, Kjell
    Uppsala University, Teknisk-naturvetenskapliga vetenskapsområdet, Physics, Department of Nuclear and Particle Physics. Department of Physics and Astronomy, Nuclear Physics.
    Gustafsson, Leif
    Uppsala University, Teknisk-naturvetenskapliga vetenskapsområdet, Physics, Department of Nuclear and Particle Physics. Department of Physics and Astronomy, Nuclear Physics.
    Hoistad, Bo
    Uppsala University, Teknisk-naturvetenskapliga vetenskapsområdet, Physics, Department of Nuclear and Particle Physics. Department of Physics and Astronomy, Nuclear Physics.
    Jacewicz, Marek
    Uppsala University, Teknisk-naturvetenskapliga vetenskapsområdet, Physics, Department of Nuclear and Particle Physics. Department of Physics and Astronomy, Nuclear Physics.
    Johansson, Tord
    Uppsala University, Teknisk-naturvetenskapliga vetenskapsområdet, Physics, Department of Nuclear and Particle Physics. Department of Physics and Astronomy, Nuclear Physics.
    Keleta, Samson
    Uppsala University, Teknisk-naturvetenskapliga vetenskapsområdet, Physics, Department of Nuclear and Particle Physics. Department of Physics and Astronomy, Nuclear Physics.
    Kullander, Sven
    Uppsala University, Teknisk-naturvetenskapliga vetenskapsområdet, Physics, Department of Nuclear and Particle Physics. Department of Physics and Astronomy, Nuclear Physics.
    Kupsc, Andrzej
    Uppsala University, Teknisk-naturvetenskapliga vetenskapsområdet, Physics, Department of Nuclear and Particle Physics. Department of Physics and Astronomy, Nuclear Physics.
    Marciniewski, Pawel
    Uppsala University, Teknisk-naturvetenskapliga vetenskapsområdet, Physics, Department of Nuclear and Particle Physics. Department of Physics and Astronomy, Nuclear Physics.
    Petterson, Henrik
    Uppsala University, Teknisk-naturvetenskapliga vetenskapsområdet, Physics, Department of Nuclear and Particle Physics. Department of Physics and Astronomy, Nuclear Physics.
    Schonning, Karin
    Uppsala University, Teknisk-naturvetenskapliga vetenskapsområdet, Physics, Department of Nuclear and Particle Physics. Department of Physics and Astronomy, Nuclear Physics.
    Thorngren, Pia
    Uppsala University, Teknisk-naturvetenskapliga vetenskapsområdet, Physics, Department of Nuclear and Particle Physics. Department of Physics and Astronomy, Nuclear Physics.
    Zlomanczuk, Jozef
    Uppsala University, Teknisk-naturvetenskapliga vetenskapsområdet, Physics, Department of Nuclear and Particle Physics. Department of Physics and Astronomy, Nuclear Physics.
    Two-Pion Production in Nucleon-Nucleon Collisions and the ABC Effect - Approaching a Puzzle by Exclusive and Kinematically Complete Measurements2006Report (Other (popular scientific, debate etc.))
  • 32.
    Calen, Hans
    et al.
    Uppsala University, Teknisk-naturvetenskapliga vetenskapsområdet, Physics, Department of Nuclear and Particle Physics.
    Fransson, Kjell
    Uppsala University, Teknisk-naturvetenskapliga vetenskapsområdet, Physics, Department of Nuclear and Particle Physics.
    Gustafsson, Leif
    Uppsala University, Teknisk-naturvetenskapliga vetenskapsområdet, Physics, Department of Nuclear and Particle Physics.
    Hoistad, Bo
    Uppsala University, Teknisk-naturvetenskapliga vetenskapsområdet, Physics, Department of Nuclear and Particle Physics.
    Jacewicz, Marek
    Uppsala University, Teknisk-naturvetenskapliga vetenskapsområdet, Physics, Department of Nuclear and Particle Physics.
    Johansson, Tord
    Uppsala University, Teknisk-naturvetenskapliga vetenskapsområdet, Physics, Department of Nuclear and Particle Physics.
    Keleta, Samson
    Uppsala University, Teknisk-naturvetenskapliga vetenskapsområdet, Physics, Department of Nuclear and Particle Physics.
    Kullander, Sven
    Uppsala University, Teknisk-naturvetenskapliga vetenskapsområdet, Physics, Department of Nuclear and Particle Physics.
    Kupsc, Andrzej
    Uppsala University, Teknisk-naturvetenskapliga vetenskapsområdet, Physics, Department of Nuclear and Particle Physics.
    Marciniewski, Pawel
    Ruber, Roger
    Interfaculty Units, The Svedberg Laboratory.
    Thörngren, Pia
    Uppsala University, Teknisk-naturvetenskapliga vetenskapsområdet, Physics, Department of Nuclear and Particle Physics.
    Zlomanczuk, Jozef
    Uppsala University, Teknisk-naturvetenskapliga vetenskapsområdet, Physics, Department of Nuclear and Particle Physics.
    On the pipi production in free and in-medium NN-collisions: sigma-channel low-mass enhancement and pi0pi0/pi+pi- asymmetry2006In: Acta Physica Slovaca, Vol. 56, no 3, p. 285-297Article in journal (Refereed)
  • 33.
    Calen, Hans
    et al.
    Uppsala University, Teknisk-naturvetenskapliga vetenskapsområdet, Physics, Department of Nuclear and Particle Physics. Kärnfysik.
    Grape, Sophie
    Uppsala University, Teknisk-naturvetenskapliga vetenskapsområdet, Physics, Department of Nuclear and Particle Physics. Kärnfysik.
    Höistad, Bo
    Uppsala University, Teknisk-naturvetenskapliga vetenskapsområdet, Physics, Department of Nuclear and Particle Physics. Kärnfysik.
    Johansson, Tord
    Uppsala University, Teknisk-naturvetenskapliga vetenskapsområdet, Physics, Department of Nuclear and Particle Physics. Kärnfysik.
    Kupsc, Andrzej
    Kärnfysik.
    Marciniewski, Pawel
    Uppsala University, Teknisk-naturvetenskapliga vetenskapsområdet, Physics, Department of Nuclear and Particle Physics. Kärnfysik.
    Thome, Erik
    Uppsala University, Teknisk-naturvetenskapliga vetenskapsområdet, Physics, Department of Nuclear and Particle Physics. Kärnfysik.
    Zlomanczuk, Jozef
    Hadron physics experiments in antiproton proton reactions with the planned PANDA detector2007In: Int. J. Mod. Phys. A22: 9th International Workshop on Meson Production, Properties and Interaction (MESON 2006), Cracow, Poland, 2007Conference paper (Refereed)
  • 34.
    Calen, Hans
    et al.
    Uppsala University, Teknisk-naturvetenskapliga vetenskapsområdet, Physics, Department of Nuclear and Particle Physics. Kärnfysik.
    Grape, Sophie
    Uppsala University, Teknisk-naturvetenskapliga vetenskapsområdet, Physics, Department of Nuclear and Particle Physics. Kärnfysik.
    Höistad, Bo
    Uppsala University, Teknisk-naturvetenskapliga vetenskapsområdet, Physics, Department of Nuclear and Particle Physics. Kärnfysik.
    Johansson, Tord
    Uppsala University, Teknisk-naturvetenskapliga vetenskapsområdet, Physics, Department of Nuclear and Particle Physics. Kärnfysik.
    Kupsc, Andrzej
    Uppsala University, Teknisk-naturvetenskapliga vetenskapsområdet, Physics, Department of Nuclear and Particle Physics. Kärnfysik.
    Marciniewski, Pawel
    Uppsala University, Teknisk-naturvetenskapliga vetenskapsområdet, Physics, Department of Nuclear and Particle Physics. Kärnfysik.
    Thome, Erik
    Uppsala University, Teknisk-naturvetenskapliga vetenskapsområdet, Physics, Department of Nuclear and Particle Physics. Kärnfysik.
    Zlomanczuk, Jozef
    Uppsala University, Teknisk-naturvetenskapliga vetenskapsområdet, Physics, Department of Nuclear and Particle Physics. Kärnfysik.
    Physics with the PANDA detector at FAIR2007In: Nucl. Phys. A790: 18th International IUPAP Conference on Few-Body Problems in Physics (FB18), Santos, Sao Paulo, Brazil, 2007Conference paper (Refereed)
  • 35.
    Cappellaro, F.
    et al.
    Uppsala University, Teknisk-naturvetenskapliga vetenskapsområdet, Physics, Department of Nuclear and Particle Physics. Department of Physics and Astronomy, Nuclear Physics. kärnfysik.
    Gustafsson, Leif
    Uppsala University, Teknisk-naturvetenskapliga vetenskapsområdet, Physics, Department of Nuclear and Particle Physics. Department of Physics and Astronomy, Nuclear Physics. kärnfysik.
    Hoistad, Bo
    Uppsala University, Teknisk-naturvetenskapliga vetenskapsområdet, Physics, Department of Nuclear and Particle Physics. Department of Physics and Astronomy, Nuclear Physics. kärnfysik.
    Jacewicz, Marek
    Uppsala University, Teknisk-naturvetenskapliga vetenskapsområdet, Physics, Department of Nuclear and Particle Physics. Department of Physics and Astronomy, Nuclear Physics. kärnfysik.
    Johansson, Tord
    Uppsala University, Teknisk-naturvetenskapliga vetenskapsområdet, Physics, Department of Nuclear and Particle Physics. Department of Physics and Astronomy, Nuclear Physics. kärnfysik.
    Keleta, Samson
    Uppsala University, Teknisk-naturvetenskapliga vetenskapsområdet, Physics, Department of Nuclear and Particle Physics. Department of Physics and Astronomy, Nuclear Physics. kärnfysik.
    Kullander, Sven
    Uppsala University, Teknisk-naturvetenskapliga vetenskapsområdet, Physics, Department of Nuclear and Particle Physics. Department of Physics and Astronomy, Nuclear Physics. kärnfysik.
    Thorngren Engblom, Pia
    Uppsala University, Teknisk-naturvetenskapliga vetenskapsområdet, Physics, Department of Nuclear and Particle Physics. Department of Physics and Astronomy, Nuclear Physics. kärnfysik.
    Wiedner, Ulrich
    Uppsala University, Teknisk-naturvetenskapliga vetenskapsområdet, Physics, Department of Nuclear and Particle Physics. Department of Physics and Astronomy, Nuclear Physics. kärnfysik.
    Wolke, Magnus
    Uppsala University, Teknisk-naturvetenskapliga vetenskapsområdet, Physics, Department of Nuclear and Particle Physics. Department of Physics and Astronomy, Nuclear Physics. kärnfysik.
    Zlomanczuk, Jozef
    Uppsala University, Teknisk-naturvetenskapliga vetenskapsområdet, Physics, Department of Nuclear and Particle Physics. Department of Physics and Astronomy, Nuclear Physics. kärnfysik.
    Calen, Hans
    Interfaculty Units, The Svedberg Laboratory. Department of Physics and Astronomy, Nuclear Physics.
    Ekstrom, Curt
    Interfaculty Units, The Svedberg Laboratory. Department of Physics and Astronomy, Nuclear Physics.
    Fransson, Kjell
    Interfaculty Units, The Svedberg Laboratory. Department of Physics and Astronomy, Nuclear Physics.
    Kupsc, Andrzej
    Interfaculty Units, The Svedberg Laboratory. Department of Physics and Astronomy, Nuclear Physics.
    Marciniewski, Pawel
    Interfaculty Units, The Svedberg Laboratory. Department of Physics and Astronomy, Nuclear Physics.
    Ruber, Roger
    Interfaculty Units, The Svedberg Laboratory. Department of Physics and Astronomy, Nuclear Physics.
    TWO-PION PRODUCTION, GAMMA GAMMA LINE AND ASPECTS OF SIGMA MESON, BOSE-EINSTEIN CORRELATIONS AND ISOSPIN BREAKING.2005In: 10th International Symposium on Meson-Nucleon Physics and the Structure of the Nucleon (MENU 2004), Beijing, China, 29 Aug - 4 Sep 2004., 2005, p. 6-Conference paper (Refereed)
  • 36.
    Cappellaro, F.
    et al.
    Uppsala University, Teknisk-naturvetenskapliga vetenskapsområdet, Physics, Department of Nuclear and Particle Physics. Department of Physics and Astronomy, Nuclear Physics. kärnfysik.
    Johansson, Tord
    Uppsala University, Teknisk-naturvetenskapliga vetenskapsområdet, Physics, Department of Nuclear and Particle Physics. Department of Physics and Astronomy, Nuclear Physics. kärnfysik.
    Gustafsson, Leif
    Uppsala University, Teknisk-naturvetenskapliga vetenskapsområdet, Physics, Department of Nuclear and Particle Physics. Department of Physics and Astronomy, Nuclear Physics. kärnfysik.
    Hoistad, Bo
    Uppsala University, Teknisk-naturvetenskapliga vetenskapsområdet, Physics, Department of Nuclear and Particle Physics. Department of Physics and Astronomy, Nuclear Physics. kärnfysik.
    Jacewicz, Marek
    Uppsala University, Teknisk-naturvetenskapliga vetenskapsområdet, Physics, Department of Nuclear and Particle Physics. Department of Physics and Astronomy, Nuclear Physics. kärnfysik.
    Keleta, Samson
    Uppsala University, Teknisk-naturvetenskapliga vetenskapsområdet, Physics, Department of Nuclear and Particle Physics. Department of Physics and Astronomy, Nuclear Physics. kärnfysik.
    Kullander, Sven
    Uppsala University, Teknisk-naturvetenskapliga vetenskapsområdet, Physics, Department of Nuclear and Particle Physics. Department of Physics and Astronomy, Nuclear Physics. kärnfysik.
    Thorngren Engblom, Pia
    Uppsala University, Teknisk-naturvetenskapliga vetenskapsområdet, Physics, Department of Nuclear and Particle Physics. Department of Physics and Astronomy, Nuclear Physics. kärnfysik.
    Wiedner, Ulrich
    Uppsala University, Teknisk-naturvetenskapliga vetenskapsområdet, Physics, Department of Nuclear and Particle Physics. Department of Physics and Astronomy, Nuclear Physics. kärnfysik.
    Wolke, Magnus
    Uppsala University, Teknisk-naturvetenskapliga vetenskapsområdet, Physics, Department of Nuclear and Particle Physics. Department of Physics and Astronomy, Nuclear Physics. kärnfysik.
    Zlomanczuk, Jozef
    Uppsala University, Teknisk-naturvetenskapliga vetenskapsområdet, Physics, Department of Nuclear and Particle Physics. Department of Physics and Astronomy, Nuclear Physics. kärnfysik.
    Calen, Hans
    Interfaculty Units, The Svedberg Laboratory. Department of Physics and Astronomy, Nuclear Physics.
    Ekstrom, Curt
    Interfaculty Units, The Svedberg Laboratory. Department of Physics and Astronomy, Nuclear Physics.
    Fransson, Kjell
    Interfaculty Units, The Svedberg Laboratory. Department of Physics and Astronomy, Nuclear Physics.
    Kupsc, Andrzej
    Interfaculty Units, The Svedberg Laboratory. Department of Physics and Astronomy, Nuclear Physics.
    Marciniewski, Pawel
    Interfaculty Units, The Svedberg Laboratory. Department of Physics and Astronomy, Nuclear Physics.
    Ruber, Roger
    Interfaculty Units, The Svedberg Laboratory. Department of Physics and Astronomy, Nuclear Physics.
    EXCLUSIVE MEASUREMENTS OF PD ---> HE-3 PI PI: THE ABC EFFECT REVISITED2005Other (Other scientific)
  • 37. Giovannella, Simona
    et al.
    Caldeira Balkeståhl, Li
    Uppsala University, Disciplinary Domain of Science and Technology, Physics, Department of Physics and Astronomy, Nuclear Physics.
    Höistad, Bo
    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.
    Redmer, Christoph
    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.
    U boson searches at KLOE2011In: Journal of Physics, Conference Series, ISSN 1742-6588, E-ISSN 1742-6596, Vol. 335, no 1, p. 012067-Article in journal (Refereed)
    Abstract [en]

    The existence of a secluded gauge sector could explain several puzzling astrophysical observations. This hypothesis can be tested at low energy e + e − colliders such as DAΊNE. Preliminary results obtained with KLOE data and perpectives for the KLOE-2 run, where a larger data sample is expected, are discussed.

  • 38.
    Hoistad, Bo
    Uppsala University, Teknisk-naturvetenskapliga vetenskapsområdet, Physics, Department of Nuclear and Particle Physics. kärnfysik.
    A search for deeply bound pionic states of xenon produced in the Xe-136(d, He-3)Xe-135(pi-bound) reaction2005In: Phys.Atom.Nucl., Vol. 68, p. 488-490Article in journal (Other (popular scientific, debate etc.))
  • 39.
    Höistad, Bo
    et al.
    Uppsala University, Teknisk-naturvetenskapliga vetenskapsområdet, Physics, Department of Nuclear and Particle Physics. Department of Physics and Astronomy, Nuclear Physics.
    Zlomanczuk, Jozef
    Uppsala University, Teknisk-naturvetenskapliga vetenskapsområdet, Physics, Department of Nuclear and Particle Physics. Department of Physics and Astronomy, Nuclear Physics.
    International Workshop on eta-Nucleus Physics: Summary and Working Group Progress Report2006Report (Other scientific)
  • 40.
    Jacewicz, Marek
    et al.
    Uppsala University.
    Höistad, Bo
    Uppsala University.
    Proceedings of the Second International Workshop on Eta Meson Physics2007Other (Other scientific)
  • 41.
    Khakimova, O.
    et al.
    Physikalisches Institut, Universität Tüubingen.
    Calèn, Hans
    Uppsala University, The Svedberg Laboratory.
    Cappellaro, F.
    Uppsala University, Disciplinary Domain of Science and Technology, Physics, Department of Nuclear and Particle Physics.
    Ekström, Curt
    Uppsala University, The Svedberg Laboratory.
    Fransson, Kjell
    Uppsala University, The Svedberg Laboratory.
    Gustafsson, Leif
    Uppsala University, Disciplinary Domain of Science and Technology, Physics, Department of Nuclear and Particle Physics.
    Höistad, Bo
    Uppsala University, Disciplinary Domain of Science and Technology, Physics, Department of Nuclear and Particle Physics.
    Jacewicz, Marek
    Uppsala University, Disciplinary Domain of Science and Technology, Physics, Department of Nuclear and Particle Physics.
    Johansson, Tord
    Uppsala University, Disciplinary Domain of Science and Technology, Physics, Department of Nuclear and Particle Physics.
    Keleta, Samson
    Uppsala University, Disciplinary Domain of Science and Technology, Physics, Department of Nuclear and Particle Physics.
    Koch, I.
    Uppsala University, Disciplinary Domain of Science and Technology, Physics, Department of Nuclear and Particle Physics.
    Kullander, Sven
    Uppsala University, Disciplinary Domain of Science and Technology, Physics, Department of Nuclear and Particle Physics.
    Kupsc, Andrzej
    Uppsala University, The Svedberg Laboratory.
    Marciniewski, Pawel
    Uppsala University, The Svedberg Laboratory.
    Ruber, Roger
    Uppsala University, The Svedberg Laboratory.
    Thörngren-Engblom, Pia
    Uppsala University, The Svedberg Laboratory.
    Wolke, Magnus
    Uppsala University, Disciplinary Domain of Science and Technology, Physics, Department of Nuclear and Particle Physics.
    Zlomanczuk, Jozef
    Uppsala University, Disciplinary Domain of Science and Technology, Physics, Department of Nuclear and Particle Physics.
    Observation of the abc effect in the first exclusive measurements of pn -> d pi(0)pi(0)2007In: International Journal of Modern Physics A, ISSN 0217-751X, E-ISSN 1793-656X, Vol. 22, no 2-3, p. 617-620Article in journal (Refereed)
    Abstract [en]

    The reaction pn → dπ0π0 constitutes the most fundamental system for the study of the ABC effect - a puzzling threshold enhancement in the ππ invariant mass spectrum of the ππ system in double-pionic fusion to nuclear bound states. The first exclusive measurements of this reaction have now been carried out at CELSIUS-WASA. They exhibit a striking low-mass enhancement in the ππ invariant mass spectrum, prove it to be a σ-channel phenomenon and falsify conventional theoretical models, which predict an associated high-mass enhancement not present in the new exclusive data. In the kinematically complete data sample we observe a ΔΔ excitation, where the interaction between the two Δ obviously plays a crucial role for the generation of the ππ low-mass enhancement.

  • 42. Mascolo, Matteo
    et al.
    Caldeira Balkeståhl, Li
    Uppsala University, Disciplinary Domain of Science and Technology, Physics, Department of Physics and Astronomy, Nuclear Physics.
    Höistad, Bo
    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.
    Redmer, Christoph
    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.
    Gamma-gamma physics at KLOE/KLOE-22012In: Journal of Physics, Conference Series, ISSN 1742-6588, E-ISSN 1742-6596, Vol. 349, no 1, p. 012014-Article in journal (Refereed)
  • 43.
    Pauly, C.
    et al.
    Institut für Experimentalphysik der Universität Hamburg.
    Jacewicz, Marek
    Uppsala University, Disciplinary Domain of Science and Technology, Physics, Department of Nuclear and Particle Physics.
    Koch, Inken
    Uppsala University, Disciplinary Domain of Science and Technology, Physics, Department of Nuclear and Particle Physics.
    Bashkanov, M.
    Bogoslawsky, D.
    Calén, Hans
    Uppsala University, The Svedberg Laboratory.
    Capellaro, Filippo
    Uppsala University, Disciplinary Domain of Science and Technology, Physics, Department of Nuclear and Particle Physics.
    Clement, H.
    Ekström, Curt
    Uppsala University, The Svedberg Laboratory.
    Fransson, Kjell
    Uppsala University, The Svedberg Laboratory.
    Gustafsson, Leif
    Uppsala University, Disciplinary Domain of Science and Technology, Physics, Department of Nuclear and Particle Physics.
    Höistad, Bo
    Uppsala University, Disciplinary Domain of Science and Technology, Physics, Department of Nuclear and Particle Physics.
    Ivanov, G.
    Jiganov, E.
    Johansson, Tord
    Uppsala University, Disciplinary Domain of Science and Technology, Physics, Department of Nuclear and Particle Physics.
    Keleta, Samson
    Uppsala University, Disciplinary Domain of Science and Technology, Physics, Department of Nuclear and Particle Physics.
    Kullander, Sven
    Uppsala University, Disciplinary Domain of Science and Technology, Physics, Department of Nuclear and Particle Physics.
    Kupsc, Andrzej
    Uppsala University, The Svedberg Laboratory.
    Kuznetsov, A.
    Marciniewski, Pawel
    Uppsala University, The Svedberg Laboratory.
    Meier, R.
    Morosov, B.
    Oelert, W.
    Petukhov, Y.
    Pettersson, Henrik
    Uppsala University, Disciplinary Domain of Science and Technology, Physics, Department of Nuclear and Particle Physics.
    Povtorejko, A.
    Ruber, Roger J.M.Y
    Uppsala University, The Svedberg Laboratory.
    Schönning, Karin
    Uppsala University, Disciplinary Domain of Science and Technology, Physics, Department of Nuclear and Particle Physics.
    Scobel, W.
    Skorodko, T.
    Shwartz, B.
    Sopov, V.
    Stepaniak, J.
    Tchernyshev, V.
    Thörngren Engblom, Pia
    Uppsala University, Disciplinary Domain of Science and Technology, Physics, Department of Nuclear and Particle Physics.
    Tikhomirov, V.
    Turowiecki, A.
    Wagner, G.J.
    Wiedner, Ulrich
    Uppsala University, Disciplinary Domain of Science and Technology, Physics, Department of Nuclear and Particle Physics.
    Wolke, Magnus
    Uppsala University, Disciplinary Domain of Science and Technology, Physics, Department of Nuclear and Particle Physics.
    Yamamoto, A.
    Zabierowski, J.
    Zlomanczuk, Jozef
    Uppsala University, Disciplinary Domain of Science and Technology, Physics, Department of Nuclear and Particle Physics.
    The ppppπππ reaction channels in the threshold region2007In: Physics Letters B, ISSN 0370-2693, E-ISSN 1873-2445, Vol. 649, no 2-3, p. 122-127Article in journal (Refereed)
    Abstract [en]

    The cross section for direct neutral and charged three pion production in pp interactions was measured at excess energies in the range 160–216 MeV. That comprises the first measurement of the ppppπ0π0π0 reaction and the direct comparison with the ppppπ+ππ0 process. The experiment was performed above the η meson production threshold and the cross section could be directly normalized to the cross section of the ppppη reaction, with the η decaying into 3 pions. Since the same final states are selected, the measurement has a low systematical error. The measured cross section ratio σ(ppppπ+ππ0)/σ(ppppπ0π0π0) is compared to predictions of dominance of different isobars in the intermediate state.

  • 44. Pauly, C.
    et al.
    Jacewicz, Marek
    Uppsala University, Teknisk-naturvetenskapliga vetenskapsområdet, Physics, Department of Nuclear and Particle Physics. Department of Physics and Astronomy, Nuclear Physics.
    Koch, Inken
    Uppsala University, Teknisk-naturvetenskapliga vetenskapsområdet, Physics, Department of Nuclear and Particle Physics. Department of Physics and Astronomy, Nuclear Physics.
    Calen, Hans
    Uppsala University, Teknisk-naturvetenskapliga vetenskapsområdet, Physics, Department of Nuclear and Particle Physics. Department of Physics and Astronomy, Nuclear Physics.
    Capellaro, Filippo
    Uppsala University, Teknisk-naturvetenskapliga vetenskapsområdet, Physics, Department of Nuclear and Particle Physics. Department of Physics and Astronomy, Nuclear Physics.
    Fransson, Kjell
    Uppsala University, Teknisk-naturvetenskapliga vetenskapsområdet, Physics, Department of Nuclear and Particle Physics. Department of Physics and Astronomy, Nuclear Physics.
    Gustafsson, Leif
    Uppsala University, Teknisk-naturvetenskapliga vetenskapsområdet, Physics, Department of Nuclear and Particle Physics. Department of Physics and Astronomy, Nuclear Physics.
    Höistad, Bo
    Uppsala University, Teknisk-naturvetenskapliga vetenskapsområdet, Physics, Department of Nuclear and Particle Physics. Department of Physics and Astronomy, Nuclear Physics.
    Johansson, Tord
    Uppsala University, Teknisk-naturvetenskapliga vetenskapsområdet, Physics, Department of Nuclear and Particle Physics. Department of Physics and Astronomy, Nuclear Physics.
    Keleta, Samson
    Uppsala University, Teknisk-naturvetenskapliga vetenskapsområdet, Physics, Department of Nuclear and Particle Physics. Department of Physics and Astronomy, Nuclear Physics.
    Kullander, Sven
    Uppsala University, Teknisk-naturvetenskapliga vetenskapsområdet, Physics, Department of Nuclear and Particle Physics. Department of Physics and Astronomy, Nuclear Physics.
    Kupsc, Andrzej
    Uppsala University, Teknisk-naturvetenskapliga vetenskapsområdet, Physics, Department of Nuclear and Particle Physics. Department of Physics and Astronomy, Nuclear Physics.
    Marciniewski, Pawel
    Uppsala University, Teknisk-naturvetenskapliga vetenskapsområdet, Physics, Department of Nuclear and Particle Physics. Department of Physics and Astronomy, Nuclear Physics.
    Pettersson, Henrik
    Uppsala University, Teknisk-naturvetenskapliga vetenskapsområdet, Physics, Department of Nuclear and Particle Physics. Department of Physics and Astronomy, Nuclear Physics.
    Schönning, Karin
    Uppsala University, Teknisk-naturvetenskapliga vetenskapsområdet, Physics, Department of Nuclear and Particle Physics. Department of Physics and Astronomy, Nuclear Physics.
    Thörngren, Pia
    Uppsala University, Teknisk-naturvetenskapliga vetenskapsområdet, Physics, Department of Nuclear and Particle Physics. Department of Physics and Astronomy, Nuclear Physics.
    Zlomanczuk, Jozef
    Uppsala University, Teknisk-naturvetenskapliga vetenskapsområdet, Physics, Department of Nuclear and Particle Physics. Department of Physics and Astronomy, Nuclear Physics.
    The p p -> p p pi pi pi reaction channels in the threshold region2007Report (Other scientific)
  • 45. Skorodko, T
    et al.
    Bashkanov, M
    Bogoslawsky, D
    Calèn, Hans
    Uppsala University, The Svedberg Laboratory.
    Clement, H
    Doroshkevich, E
    Demiroers, L
    Ekström, Curt
    Uppsala University, The Svedberg Laboratory.
    Fransson, Kjell
    Uppsala University, The Svedberg Laboratory.
    Gustafsson, Leif
    Uppsala University, Disciplinary Domain of Science and Technology, Physics, Department of Nuclear and Particle Physics.
    Höistad, Bo
    Uppsala University, Disciplinary Domain of Science and Technology, Physics, Department of Nuclear and Particle Physics.
    Ivanov, G
    Jacewicz, Marek
    Uppsala University, Disciplinary Domain of Science and Technology, Physics, Department of Nuclear and Particle Physics.
    Jiganov, E
    Johansson, Tord
    Uppsala University, Disciplinary Domain of Science and Technology, Physics, Department of Nuclear and Particle Physics.
    Khakimova, O
    Keleta, Samson
    Uppsala University, Disciplinary Domain of Science and Technology, Physics, Department of Nuclear and Particle Physics.
    Koch, Inken
    Uppsala University, Disciplinary Domain of Science and Technology, Physics, Department of Nuclear and Particle Physics.
    Kren, F
    Kullander, Sven
    Uppsala University, Disciplinary Domain of Science and Technology, Physics, Department of Nuclear and Particle Physics.
    Kupsc, Andrzej
    Uppsala University, The Svedberg Laboratory.
    Marciniewski, Pawel
    Uppsala University, The Svedberg Laboratory.
    Meier, R
    Morosov, B
    Pauly, C
    Petrén, Henrik
    Uppsala University, Disciplinary Domain of Science and Technology, Physics, Department of Nuclear and Particle Physics.
    Petukhov, Y
    Povtorejko, A
    Ruber, Roger J. M. Y.
    Uppsala University, The Svedberg Laboratory.
    Schönning, Karin
    Uppsala University, Disciplinary Domain of Science and Technology, Physics, Department of Nuclear and Particle Physics.
    Scobel, W
    Shwartz, B
    Stepaniak, J
    Thörngren-Engblom, Pia
    Uppsala University, Disciplinary Domain of Science and Technology, Physics, Department of Nuclear and Particle Physics.
    Tikhomirov, V
    Wagner, G.J.
    Wolke, Magnus
    Uppsala University, Disciplinary Domain of Science and Technology, Physics, Department of Nuclear and Particle Physics.
    Yamamoto, A
    Zabierowski, J
    Zlomanczuk, Jozef
    Uppsala University, Disciplinary Domain of Science and Technology, Physics, Department of Nuclear and Particle Physics.
    Two-pion production in proton-proton collisions: experimental total cross sections and their isospin decomposition2009In: Physics Letters B, ISSN 0370-2693, E-ISSN 1873-2445, Vol. 679, no 1, p. 30-35Article in journal (Refereed)
    Abstract [en]

    The two-pion production in pp-collisions has been investigated at CELSIUS in exclusive measurements from threshold up to T-P = 1.36 GeV. Total and differential Cross sections have been obtained for the channels pn pi(+)pi(0), pp pi(+)pi(-), pp pi(0)pi(0) and also nn pi(+)pi(+). For intermediate incident energies T-P > 1GeV, i.e. in the region which is beyond the Roper excitation but at the onset of Delta Delta excitation, the total pp pi(0)pi(0) cross section falls behind theoretical predictions by as much as all order of magnitude near 1.2 GeV, whereas the nn pi(+)pi(+) cross section is a factor of five larger than predicted. An isospin decomposition of the total cross sections exhibits a s-channel-like energy dependence in the region of the Roper excitation as well as a significant contribution of an isospin 3/2 resonance other than the Delta(1232). As possible candidates the Delta(1600) and the Delta(1700) are discussed. (C) 2009 Elsevier B.V. All rights reserved.

  • 46. Skorodko, T.
    et al.
    Bashkanov, M.
    Bogoslawsky, D.
    Calén, Hans
    Uppsala University, The Svedberg Laboratory.
    Clement, H.
    Doroshkevich, E.
    Demiroers, L.
    Ekström, Curt
    Uppsala University, The Svedberg Laboratory.
    Fransson, Kjell
    Uppsala University, The Svedberg Laboratory.
    Gustafsson, Leif
    Uppsala University, Disciplinary Domain of Science and Technology, Physics, Department of Physics and Astronomy.
    Höistad, Bo
    Uppsala University, Disciplinary Domain of Science and Technology, Physics, Department of Physics and Astronomy, Nuclear Physics.
    Ivanov, G.
    Jacewicz, Marek
    Uppsala University, Disciplinary Domain of Science and Technology, Physics, Department of Physics and Astronomy.
    Jiganov, E.
    Johansson, Tord
    Uppsala University, Disciplinary Domain of Science and Technology, Physics, Department of Physics and Astronomy, Nuclear Physics.
    Khakimova, O.
    Keleta, Samson
    Uppsala University, Disciplinary Domain of Science and Technology, Physics, Department of Physics and Astronomy.
    Koch, Inken
    Uppsala University, Disciplinary Domain of Science and Technology, Physics, Department of Physics and Astronomy.
    Kren, F.
    Kullander, Sven
    Uppsala University, Disciplinary Domain of Science and Technology, Physics, Department of Physics and Astronomy.
    Kupsc, Andrzej
    Uppsala University, Disciplinary Domain of Science and Technology, Physics, Department of Physics and Astronomy, Nuclear Physics.
    Marciniewski, Pawel
    Uppsala University, The Svedberg Laboratory.
    Meier, R.
    Morosov, B.
    Pauly, C.
    Petrén, Henrik
    Uppsala University, Disciplinary Domain of Science and Technology, Physics, Department of Physics and Astronomy, Nuclear Physics.
    Petukhov, Y.
    Povtorejko, A.
    Ruber, Roger J. M. Y.
    Uppsala University, The Svedberg Laboratory.
    Schönning, Karin
    Uppsala University, Disciplinary Domain of Science and Technology, Physics, Department of Physics and Astronomy, Nuclear Physics.
    Scobel, W.
    Shwartz, B.
    Stepaniak, J.
    Thörngren-Engblom, Pia
    Uppsala University, Disciplinary Domain of Science and Technology, Physics, Department of Physics and Astronomy.
    Tikhomirov, V.
    Wagner, G. J.
    Wolke, Magnus
    Uppsala University, Disciplinary Domain of Science and Technology, Physics, Department of Physics and Astronomy, Nuclear Physics.
    Yamamoto, A.
    Zabierowski, J.
    Zlomanczuk, Jozef
    Uppsala University, Disciplinary Domain of Science and Technology, Physics, Department of Physics and Astronomy, Nuclear Physics.
    Exclusive measurement of the pp -> nn pi(+)pi(+) reaction at 1.1 GeV2011In: European Physical Journal A, ISSN 1434-6001, E-ISSN 1434-601X, Vol. 47, no 9, p. 108-Article in journal (Refereed)
    Abstract [en]

    First exclusive data for the pp -> nnp(+)pi(+) reaction have been obtained at CELSIUS with the WASA detector setup at a beam energy of T(p) - 1.1 GeV. Total and differential cross-sections disagree with theoretical calculations, which predict the Delta Delta excitation to be the dominant process at this beam energy. Instead, the data require the excitation of one of the nucleons to a higher-lying Delta state, preferably the Delta(1600)P(33), to be the leading process.

  • 47.
    Skorodko, T.
    et al.
    Physikalisches Institut, Universität Tübingen.
    Calèn, Hans
    Uppsala University, The Svedberg Laboratory.
    Cappellaro, F.
    Uppsala University, Disciplinary Domain of Science and Technology, Physics, Department of Nuclear and Particle Physics.
    Ekström, Curt
    Uppsala University, The Svedberg Laboratory.
    Fransson, Kjell
    Uppsala University, The Svedberg Laboratory.
    Greiff, Jan
    Uppsala University, The Svedberg Laboratory.
    Gustafsson, Leif
    Uppsala University, Disciplinary Domain of Science and Technology, Physics, Department of Nuclear and Particle Physics.
    Höistad, Bo
    Uppsala University, Disciplinary Domain of Science and Technology, Physics, Department of Nuclear and Particle Physics.
    Jacewicz, Marek
    Uppsala University, Disciplinary Domain of Science and Technology, Physics, Department of Nuclear and Particle Physics.
    Johansson, Tord
    Uppsala University, Disciplinary Domain of Science and Technology, Physics, Department of Nuclear and Particle Physics.
    Keleta, Samson
    Uppsala University, Disciplinary Domain of Science and Technology, Physics, Department of Nuclear and Particle Physics.
    Koch, I.
    Uppsala University, Disciplinary Domain of Science and Technology, Physics, Department of Nuclear and Particle Physics.
    Kullander, Sven
    Uppsala University, Disciplinary Domain of Science and Technology, Physics, Department of Nuclear and Particle Physics.
    Kupsc, Andrzej
    Uppsala University, The Svedberg Laboratory.
    Marciniewski, Pawel
    Uppsala University, The Svedberg Laboratory.
    Ruber, Roger
    Uppsala University, The Svedberg Laboratory.
    Thörngren-Engblom, Pia
    Uppsala University, The Svedberg Laboratory.
    Wolke, Magnus
    Uppsala University, Disciplinary Domain of Science and Technology, Physics, Department of Nuclear and Particle Physics.
    Zlomanczuk, Jozef
    Uppsala University, Disciplinary Domain of Science and Technology, Physics, Department of Nuclear and Particle Physics.
    pi pi production in proton-proton collisions2007In: International Journal of Modern Physics A, ISSN 0217-751X, E-ISSN 1793-656X, Vol. 22, no 2-3, p. 509-513Article in journal (Refereed)
    Abstract [en]

    At CELSIUS-WASA the two-pion production in proton-proton collisisons has been measured exclusively from threshold up to the energy regime, where both of the collision partners are expected to be excited to the Δ state. The measurements constitute the first kinematically complete data samples of solid statistics in this energy range. Most of the data have been obtained for the π+π- and π0π0channels. Whereas at near-threshold energies the differential distributions can be succesfully explained by chiral dynamics and Roper excitation, respectively, the data for the π+π- channel in the ΔΔ region can be described only, if the special configuration (ΔΔ)0+ is assumed. The data for the π0π0 channel moreover exhibit a low-mass enhancement in the π0π0 invariant mass spectrum, which is reminiscent of the ABC-effect found in double-pionic fusion to light nuclei.

1 - 47 of 47
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