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  • 1. Ablikim, M.
    et al.
    Adlarson, Patrik
    Uppsala University, Disciplinary Domain of Science and Technology, Physics, Department of Physics and Astronomy, Nuclear Physics.
    Biernat, Jacek
    Uppsala University, Disciplinary Domain of Science and Technology, Physics, Department of Physics and Astronomy, Nuclear Physics.
    Andersson, Walter Ikegami
    Uppsala University, Disciplinary Domain of Science and Technology, Physics, Department of Physics and Astronomy, Nuclear Physics.
    Johansson, Tord
    Uppsala University, Disciplinary Domain of Science and Technology, Physics, Department of Physics and Astronomy, Nuclear Physics.
    Kupsc, Andrzej
    Uppsala University, Disciplinary Domain of Science and Technology, Physics, Department of Physics and Astronomy, Nuclear Physics.
    Li, Cui
    Uppsala University, Disciplinary Domain of Science and Technology, Physics, Department of Physics and Astronomy, Nuclear Physics.
    Papenbrock, Michael
    Uppsala University, Disciplinary Domain of Science and Technology, Physics, Department of Physics and Astronomy, Nuclear Physics.
    Pettersson, Joachim
    Uppsala University, Disciplinary Domain of Science and Technology, Physics, Department of Physics and Astronomy, Nuclear Physics.
    Schönning, Karin
    Uppsala University, Disciplinary Domain of Science and Technology, Physics, Department of Physics and Astronomy, Nuclear Physics.
    Thorén, Viktor
    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.
    Zou, J. H.
    Measurement of the branching fraction of J/psi -> omega eta 'pi(+)pi(-) and search for J/psi -> omega X(1835), X(1835) -> eta 'pi(+)pi(-) decay2019In: Physical Review D: covering particles, fields, gravitation, and cosmology, ISSN 2470-0010, E-ISSN 2470-0029, Vol. 99, no 7, article id 071101Article in journal (Refereed)
    Abstract [en]

    Using a sample of 1.31 x 10(9) J/psi events collected by the BESIII detector at BEPCII during 2009 and 2012, we study the J/psi -> omega eta'pi(+)pi(-) thorn p-hadronic process. For the first time, we measure the branching ratio B(J/psi -> omega eta'pi(+)pi(-)) = (1.12 +/- 0.02 +/- 0.13) x 10(-3). We search for the X(1835) state in the eta'pi(+)pi(-) invariant mass spectra. No evidence is found and we estimate the upper limit on the branching fraction at 90% confidence level to be B(J/psi -> omega X(1835), X(1835) -> eta'pi(+)pi(-)) < 6.2 x 10(-5).

  • 2.
    Ablikim, M.
    et al.
    Institute of High Energy Physics, Beijing 100049, People’s Republic of China.
    Adlarson, Patrik
    Uppsala University, Disciplinary Domain of Science and Technology, Physics, Department of Physics and Astronomy, Nuclear Physics.
    Biernat, Jacek
    Uppsala University, Disciplinary Domain of Science and Technology, Physics, Department of Physics and Astronomy, Nuclear Physics.
    Ikegami Andersson, Walter
    Uppsala University, Disciplinary Domain of Science and Technology, Physics, Department of Physics and Astronomy, Nuclear Physics.
    Johansson, Tord
    Uppsala University, Disciplinary Domain of Science and Technology, Physics, Department of Physics and Astronomy, Nuclear Physics.
    Kupsc, Andrzej
    Uppsala University, Disciplinary Domain of Science and Technology, Physics, Department of Physics and Astronomy, Nuclear Physics.
    Li, C.
    Uppsala University.
    Papenbrock, Michael
    Uppsala University, Disciplinary Domain of Science and Technology, Physics, Department of Physics and Astronomy, Nuclear Physics.
    Pettersson, Joachim
    Uppsala University, Disciplinary Domain of Science and Technology, Physics, Department of Physics and Astronomy, Nuclear Physics.
    Schönning, Karin
    Uppsala University, Disciplinary Domain of Science and Technology, Physics, Department of Physics and Astronomy, Nuclear Physics.
    Thorén, Viktor
    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.
    Zou, J. H.
    Institute of High Energy Physics, Beijing 100049, People’s Republic of China.
    Study of the process e(+) e(-) -> p(p)over-bar via initial state radiation at BESIII2019In: Physical Review D: covering particles, fields, gravitation, and cosmology, ISSN 2470-0010, E-ISSN 2470-0029, Vol. 99, no 9, article id 092002Article in journal (Refereed)
    Abstract [en]

    The Born cross section for the process e(+) e(-)-> p (p) over bar is measured using the initial state radiation technique with an undetected photon. This analysis is based on datasets corresponding to an integrated luminosity of 75 fb(-1), collected with the BESIII detector at the BEPCII collider at center of mass energies between 3.773 and 4.600 GeV. The Born cross section for the process e(+) e(-)-> p (p) over bar and the proton effective form factor are determined in the p (p) over bar invariant mass range between 2.0 and 3.8 GeV/c(2) divided into 30 intervals. The proton form factor ratio (vertical bar G(E)vertical bar/vertical bar G(M)vertical bar) is measured in 3 intervals of the p (p ) over bar invariant mass between 2.0 and 3.0 GeV/c(2).

  • 3. Ablikim, M.
    et al.
    Adlarson, Patrik
    Uppsala University, Disciplinary Domain of Science and Technology, Physics, Department of Physics and Astronomy, Nuclear Physics.
    Biernat, Jacek
    Uppsala University, Disciplinary Domain of Science and Technology, Physics, Department of Physics and Astronomy, Nuclear Physics.
    Ikegami Andersson, Walter
    Uppsala University, Disciplinary Domain of Science and Technology, Physics, Department of Physics and Astronomy, Nuclear Physics.
    Johansson, Tord
    Uppsala University, Disciplinary Domain of Science and Technology, Physics, Department of Physics and Astronomy, Nuclear Physics.
    Kupsc, Andrzej
    Uppsala University, Disciplinary Domain of Science and Technology, Physics, Department of Physics and Astronomy, Nuclear Physics.
    Li, Cui
    Uppsala University, Disciplinary Domain of Science and Technology, Physics, Department of Physics and Astronomy, Nuclear Physics.
    Papenbrock, Michael
    Uppsala University, Disciplinary Domain of Science and Technology, Physics, Department of Physics and Astronomy, Nuclear Physics.
    Pettersson, J.
    Uppsala University, Disciplinary Domain of Science and Technology, Physics, Department of Physics and Astronomy, Applied Nuclear Physics.
    Schönning, Karin
    Thorén, Viktor
    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.
    Zou, J. H.
    Search for the decay eta ' -> gamma gamma eta (Search for the decay η′→γγη)2019In: Physical Review D: covering particles, fields, gravitation, and cosmology, ISSN 2470-0010, E-ISSN 2470-0029, Vol. 100, no 5, article id 052015Article in journal (Refereed)
    Abstract [en]

    Using a data sample of 1.31 x 10(9) J/psi events collected with the BESIII detector, a search for eta' -> gamma gamma eta via J/psi ->gamma eta' is performed for the first time. No significant eta' signal is observed in the gamma gamma eta invariant mass spectrum, and the branching fraction of eta' -> gamma gamma eta is determined to be less than 1.33 x 10(-4) at the 90% confidence level.

  • 4. Ablikim, M.
    et al.
    Adlarson, Patrik
    Uppsala University, Disciplinary Domain of Science and Technology, Physics, Department of Physics and Astronomy, Nuclear Physics.
    Biernat, Jacek
    Uppsala University, Disciplinary Domain of Science and Technology, Physics, Department of Physics and Astronomy, Nuclear Physics.
    Ikegami Andersson, Walter
    Uppsala University, Disciplinary Domain of Science and Technology, Physics, Department of Physics and Astronomy, Nuclear Physics.
    Johansson, Tord
    Uppsala University, Disciplinary Domain of Science and Technology, Physics, Department of Physics and Astronomy, Nuclear Physics.
    Kupsc, Andrzej
    Uppsala University, Disciplinary Domain of Science and Technology, Physics, Department of Physics and Astronomy, Nuclear Physics.
    Li, Cui
    Uppsala University, Disciplinary Domain of Science and Technology, Physics, Department of Physics and Astronomy, Nuclear Physics.
    Papenbrock, Michael
    Uppsala University, Disciplinary Domain of Science and Technology, Physics, Department of Physics and Astronomy, Nuclear Physics.
    Pettersson, Joachim
    Uppsala University, Disciplinary Domain of Science and Technology, Physics, Department of Physics and Astronomy, Nuclear Physics.
    Schönning, Karin
    Uppsala University, Disciplinary Domain of Science and Technology, Physics, Department of Physics and Astronomy, Nuclear Physics.
    Thorén, Viktor
    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.
    Zhang, Z. H.
    Measurement of branching fractions of psi(3686) -> phi eta ', phi f(1) (1285) and phi eta(1405)2019In: Physical Review D: covering particles, fields, gravitation, and cosmology, ISSN 2470-0010, E-ISSN 2470-0029, Vol. 100, no 9, article id 092003Article in journal (Refereed)
    Abstract [en]

    Using a sample of 448.1 x 10(6) psi(3686) events collected with the BESIII detector, we perform a study of the decay psi(3686) -> phi pi(+)pi(-)eta. The branching fraction of psi(3686) -> phi eta' is determined to be (1.51 +/- 0.16 +/- 0.12) x 10(-5), which is consistent with the previous measurement but with significantly improved precision. The resonances f(1)(1285) and eta(1405) are clearly observed in the pi(+)pi(-)eta mass spectrum with statistical significances of 18s and 9.7 sigma, respectively. The corresponding product branching fractions are measured to be B(psi(3686) -> phi f(1)(1285), f(1)(1285) -> pi(+)pi(-)eta) = )1.03 +/- 0.10 +/- 0.09) x 10(-5) and B(psi(3686) -> phi eta(1405), eta(1405) -> pi(+)pi(-)eta) = (8.46 +/- 1.37 +/- 0.92) x 10(-6). These results are used to test the perturbative QCD "12% rule."

  • 5. Ablikim, M.
    et al.
    Adlarson, Patrik
    Uppsala University, Disciplinary Domain of Science and Technology, Physics, Department of Physics and Astronomy, Nuclear Physics.
    Biernat, Jacek
    Uppsala University, Disciplinary Domain of Science and Technology, Physics, Department of Physics and Astronomy, Nuclear Physics.
    Ikegami Andersson, Walter
    Uppsala University, Disciplinary Domain of Science and Technology, Physics, Department of Physics and Astronomy, Nuclear Physics.
    Johansson, Tord
    Uppsala University, Disciplinary Domain of Science and Technology, Physics, Department of Physics and Astronomy, Nuclear Physics.
    Kupsc, Andrzej
    Uppsala University, Disciplinary Domain of Science and Technology, Physics, Department of Physics and Astronomy, Nuclear Physics.
    Li, Cui
    Uppsala University, Disciplinary Domain of Science and Technology, Physics, Department of Physics and Astronomy, Nuclear Physics.
    Papenbrock, Michael
    Uppsala University, Disciplinary Domain of Science and Technology, Physics, Department of Physics and Astronomy, Nuclear Physics.
    Pettersson, Joachim
    Uppsala University, Disciplinary Domain of Science and Technology, Physics, Department of Physics and Astronomy, Nuclear Physics.
    Schönning, Karin
    Uppsala University, Disciplinary Domain of Science and Technology, Physics, Department of Physics and Astronomy, Nuclear Physics.
    Thorén, Viktor
    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.
    Zou, J. H.
    Amplitude analysis of D+-> K-S(0)pi(+)pi(+)pi(-)2019In: Physical Review D: covering particles, fields, gravitation, and cosmology, ISSN 2470-0010, E-ISSN 2470-0029, Vol. 100, no 7, article id 072008Article in journal (Refereed)
    Abstract [en]

    The decay D+-> K-S(0)pi(+)pi(+)pi(-) is studied with an amplitude analysis using a data set of 2.93 fb(-1) of e(+)e(-) collisions at the psi(3770) peak accumulated by the BESIII detector. Intermediate states and nonresonant components, and their relative fractions and phases, have been determined. The significant amplitudes, which contribute to the model that best fits the data, are composed of five quasitwo-body decays K(S)(0)a(1)(1260)(+), (K) over bar (1)(1270)(0)pi(+) (K) over bar (1)(1400)(0)pi(+), (K) over bar (1)(1650)(0)pi(+), and (K) over bar (1460)(0)pi(+), a three-body decay K-S(0)pi(+)rho(0), as well as a nonresonant component K-S(0)pi(+)pi(+)pi(-). The dominant amplitude is K(S)(0)a(1)(1260)(+), with a fit fraction of (40.3 +/- 2.1 +/- 2.9)%, where the first and second uncertainties are statistical and systematic, respectively.

  • 6. Ablikim, M.
    et al.
    Adlarson, Patrik
    Uppsala University, Disciplinary Domain of Science and Technology, Physics, Department of Physics and Astronomy, Nuclear Physics.
    Biernat, Jacek
    Uppsala University, Disciplinary Domain of Science and Technology, Physics, Department of Physics and Astronomy, Nuclear Physics.
    Ikegami Andersson, Walter
    Uppsala University, Disciplinary Domain of Science and Technology, Physics, Department of Physics and Astronomy, Nuclear Physics.
    Johansson, Tord
    Uppsala University, Disciplinary Domain of Science and Technology, Physics, Department of Physics and Astronomy, Nuclear Physics.
    Kupsc, Andrzej
    Uppsala University, Disciplinary Domain of Science and Technology, Physics, Department of Physics and Astronomy, Nuclear Physics.
    Li, Cui
    Uppsala University, Disciplinary Domain of Science and Technology, Physics, Department of Physics and Astronomy, Nuclear Physics.
    Papenbrock, Michael
    Uppsala University, Disciplinary Domain of Science and Technology, Physics, Department of Physics and Astronomy, Nuclear Physics.
    Pettersson, Joachim
    Uppsala University, Disciplinary Domain of Science and Technology, Physics, Department of Physics and Astronomy, Nuclear Physics.
    Schönning, Karin
    Uppsala University, Disciplinary Domain of Science and Technology, Physics, Department of Physics and Astronomy, Nuclear Physics.
    Thorén, Viktor
    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.
    Zou, J. H.
    Complete Measurement of the Λ Electromagnetic Form Factors2019In: Physical Review Letters, ISSN 0031-9007, E-ISSN 1079-7114, Vol. 123, no 12, article id 122003Article in journal (Refereed)
    Abstract [en]

    The exclusive process e(+)e(-) -> Lambda(Lambda) over bar, with Lambda -> p pi(-) and (Lambda) over bar -> (p) over bar pi(+), has been studied at root s = 2.396 GeV for measurement of the timelike Lambda electric and magnetic form factors, G(E) and G(M). A data sample, corresponding to an integrated luminosity of 66.9 pb(-1), was collected with the BESIII detector for this purpose. A multidimensional analysis with a complete decomposition of the spin structure of the reaction enables a determination of the modulus of the ratio R = vertical bar G(E)/G(M)vertical bar and, for the first time for any baryon, the relative phase Delta Phi = Phi(E) - Phi(M). The resulting values are R = 0.96 +/- 0.14(stat) +/- 0.02(syst) and Phi(F) = 37 degrees +/- 12 degrees (stat) +/- 6 degrees (syst), respectively. These are obtained using the recently established and most precise value of the asymmetry parameter alpha(Lambda) = 0.750 +/- 0.010 measured by BESIII. In addition, the cross section is measured with unprecedented precision to be sigma = 118.7 +/- 5.3(stat) +/- 5.1(syst) pb, which corresponds to an effective form factor of vertical bar G vertical bar = 0.123 +/- 0.003(stat) +/- 0.003(syst). The contribution from two-photon exchange is found to be negligible. Our result enables the first complete determination of baryon timelike electromagnetic form factors.

  • 7. Ablikim, M.
    et al.
    Adlarson, Patrik
    Uppsala University, Disciplinary Domain of Science and Technology, Physics, Department of Physics and Astronomy, Nuclear Physics.
    Biernat, Jacek
    Uppsala University, Disciplinary Domain of Science and Technology, Physics, Department of Physics and Astronomy, Nuclear Physics.
    Ikegami Andersson, Walter
    Uppsala University, Disciplinary Domain of Science and Technology, Physics, Department of Physics and Astronomy, Nuclear Physics.
    Johansson, Tord
    Uppsala University, Disciplinary Domain of Science and Technology, Physics, Department of Physics and Astronomy, Nuclear Physics.
    Kupsc, Andrzej
    Uppsala University, Disciplinary Domain of Science and Technology, Physics, Department of Physics and Astronomy, Nuclear Physics.
    Li, Cui
    Uppsala University, Disciplinary Domain of Science and Technology, Physics, Department of Physics and Astronomy, Nuclear Physics.
    Papenbrock, Michael
    Uppsala University, Disciplinary Domain of Science and Technology, Physics, Department of Physics and Astronomy, Nuclear Physics.
    Pettersson, Joachim
    Uppsala University, Disciplinary Domain of Science and Technology, Physics, Department of Physics and Astronomy, Nuclear Physics.
    Schönning, Karin
    Uppsala University, Disciplinary Domain of Science and Technology, Physics, Department of Physics and Astronomy, Nuclear Physics.
    Thorén, Viktor
    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.
    Zou, J. H.
    Cross section measurements of e(+) e(-) -> omega chi(c0) from root s=4.178 to 4.278 GeV2019In: Physical Review D: covering particles, fields, gravitation, and cosmology, ISSN 2470-0010, E-ISSN 2470-0029, Vol. 99, no 9, article id 091103Article in journal (Refereed)
    Abstract [en]

    The cross section of the process e(+)e(-) -> omega chi(C0) is measured at center -of -mass energies from root s = 4.178 to 4.278 GeV using a data sample of 7 fb(-1) collected with the BESIII detector operating at the BEPCII storage ring. The dependence of the cross section on root s shows a resonant structure with mass of (4218.5 +/- 1.6(stat) +/- 4.0(syst)) MeV/c(2) and width of (28.2 +/- 3.9(stat) +/- 1.6(syst)) MeV, respectively. This observation confirms and improves upon the result of a previous study. The angular distribution of the e(+) e(-) ->omega chi(C0) process is extracted for the first time.

  • 8. Ablikim, M.
    et al.
    Adlarson, Patrik
    Uppsala University, Disciplinary Domain of Science and Technology, Physics, Department of Physics and Astronomy, Nuclear Physics.
    Biernat, Jacek
    Uppsala University, Disciplinary Domain of Science and Technology, Physics, Department of Physics and Astronomy, Nuclear Physics.
    Ikegami Andersson, Walter
    Uppsala University, Disciplinary Domain of Science and Technology, Physics, Department of Physics and Astronomy, Nuclear Physics.
    Johansson, Tord
    Uppsala University, Disciplinary Domain of Science and Technology, Physics, Department of Physics and Astronomy, Nuclear Physics.
    Kupsc, Andrzej
    Uppsala University, Disciplinary Domain of Science and Technology, Physics, Department of Physics and Astronomy, Nuclear Physics.
    Li, Cui
    Uppsala University, Disciplinary Domain of Science and Technology, Physics, Department of Physics and Astronomy, Nuclear Physics.
    Papenbrock, Michael
    Uppsala University, Disciplinary Domain of Science and Technology, Physics, Department of Physics and Astronomy, Nuclear Physics.
    Pettersson, Joachim
    Uppsala University, Disciplinary Domain of Science and Technology, Physics, Department of Physics and Astronomy, Nuclear Physics.
    Schönning, Karin
    Uppsala University, Disciplinary Domain of Science and Technology, Physics, Department of Physics and Astronomy, Nuclear Physics.
    Thorén, Viktor
    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.
    Zou, J. H.
    Cross section measurements of e+e- -> K+ K- K+ K- and ΦK+ K- at center-of-mass energies from 2.10 to 3.08 GeV2019In: Physical Review D: covering particles, fields, gravitation, and cosmology, ISSN 2470-0010, E-ISSN 2470-0029, Vol. 100, no 3, article id 032009Article in journal (Refereed)
    Abstract [en]

    We measure the Born cross sections of the process e(+)e(-) -> K+ K- K+ K- at center-of-mass (c.m.) energies, root s, between 2.100 and 3.080 GeV. The data were collected using the BESIII detector at the BEPCII collider. An enhancement at root s = 2.232 GeV is observed, very close to the e(+)e(-) -> Lambda(Lambda) over bar production threshold. A similar enhancement at the same c.m. energy is observed in the e(+)e(-) -> phi K+ K- cross section. The energy dependence of the K+ K- K+ K- and phi K+ K- cross sections differs significantly from that of e(+)e(-) -> phi pi(+)pi(-).

  • 9. Ablikim, M.
    et al.
    Adlarson, Patrik
    Uppsala University, Disciplinary Domain of Science and Technology, Physics, Department of Physics and Astronomy, Nuclear Physics.
    Biernat, Jacek
    Uppsala University, Disciplinary Domain of Science and Technology, Physics, Department of Physics and Astronomy, Nuclear Physics.
    Ikegami Andersson, Walter
    Uppsala University, Disciplinary Domain of Science and Technology, Physics, Department of Physics and Astronomy, Nuclear Physics.
    Johansson, Tord
    Uppsala University, Disciplinary Domain of Science and Technology, Physics, Department of Physics and Astronomy, Nuclear Physics.
    Kupsc, Andrzej
    Uppsala University, Disciplinary Domain of Science and Technology, Physics, Department of Physics and Astronomy, Nuclear Physics.
    Li, Cui
    Uppsala University, Disciplinary Domain of Science and Technology, Physics, Department of Physics and Astronomy, Nuclear Physics.
    Papenbrock, Michael
    Uppsala University, Disciplinary Domain of Science and Technology, Physics, Department of Physics and Astronomy, Nuclear Physics.
    Pettersson, Joachim
    Uppsala University, Disciplinary Domain of Science and Technology, Physics, Department of Physics and Astronomy, Nuclear Physics.
    Schönning, Karin
    Uppsala University, Disciplinary Domain of Science and Technology, Physics, Department of Physics and Astronomy, Nuclear Physics.
    Thorén, Viktor
    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.
    Zou, J. H.
    First observations of h(c )-> hadrons2019In: Physical Review D: covering particles, fields, gravitation, and cosmology, ISSN 2470-0010, E-ISSN 2470-0029, Vol. 99, no 7, article id 072008Article in journal (Refereed)
    Abstract [en]

    Based on (4.48 +/- 0.03) x 10(8) Psi(3686) events, collected with the BESIII detector at the BEPCII storage ring, five h(c) hadronic decays are searched for via the process Psi(3686) -> pi(0)h(c). Three of them, h(c) -> p (p) over bar pi(+)pi(-) , pi(+)pi(-)pi(0 )and 2(pi(+)pi(-))pi(0) are observed for the first time with significances of 7.4 sigma, 4.6 sigma, and 9.1 sigma, and their branching fractions are determined to be (2.89 +/- 0.32 +/- 0.55) x 10(-3), (1.60 +/- 0.40 +/- 0.32) x 10(-3), and (7.44 +/- 0.94 +/- 1.52) x 10(-3), respectively, where the first uncertainties are statistical and the second systematic. No significant signal is observed for the other two decay modes, and the corresponding upper limits of the branching fractions are determined to be B(h(c) -> 3(pi(+)pi(-))pi(0)) < 8.7 x 10(-3) and B(h(c) -> K+K-pi(+)pi(-) ) < 5.8 x 10(-4) at the 90% confidence level.

  • 10. Ablikim, M.
    et al.
    Adlarson, Patrik
    Uppsala University, Disciplinary Domain of Science and Technology, Physics, Department of Physics and Astronomy, Nuclear Physics.
    Biernat, Jacek
    Uppsala University, Disciplinary Domain of Science and Technology, Physics, Department of Physics and Astronomy, Nuclear Physics.
    Ikegami Andersson, Walter
    Uppsala University, Disciplinary Domain of Science and Technology, Physics, Department of Physics and Astronomy, Nuclear Physics.
    Johansson, Tord
    Uppsala University, Disciplinary Domain of Science and Technology, Physics, Department of Physics and Astronomy, Nuclear Physics.
    Kupsc, Andrzej
    Uppsala University, Disciplinary Domain of Science and Technology, Physics, Department of Physics and Astronomy, Nuclear Physics.
    Li, Cui
    Uppsala University, Disciplinary Domain of Science and Technology, Physics, Department of Physics and Astronomy, Nuclear Physics.
    Papenbrock, Michael
    Uppsala University, Disciplinary Domain of Science and Technology, Physics, Department of Physics and Astronomy, Nuclear Physics.
    Pettersson, Joachim
    Uppsala University, Disciplinary Domain of Science and Technology, Physics, Department of Physics and Astronomy, Nuclear Physics.
    Schönning, Karin
    Uppsala University, Disciplinary Domain of Science and Technology, Physics, Department of Physics and Astronomy, Nuclear Physics.
    Thorén, Viktor
    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.
    Zou, J. H.
    Improved measurements of the absolute branching fractions of the inclusive decays D+(0) -> phi X2019In: Physical Review D: covering particles, fields, gravitation, and cosmology, ISSN 2470-0010, E-ISSN 2470-0029, Vol. 100, no 7, article id 072006Article in journal (Refereed)
    Abstract [en]

    By analyzing 2.93 fb(-1) of e(+)e(-) annihilation data taken at the center-of-mass energy root s = 3.773 GeV with the BESIII detector, we determine the branching fractions of the inclusive decays D+-> phi X and D-0 -> phi X to be (1.135 +/- 0.034 +/- 0.031)% and (1.091 +/- 0.027 +/- 0.035)%, respectively, where X denotes any possible particle combination. The first uncertainties are statistical, and the second are systematic. We also determine the branching fractions of the decays D -> phi X and their charge conjugate modes (D) over bar -> phi(X) over bar separately for the first time, and no significant CP asymmetry is observed.

  • 11. Ablikim, M.
    et al.
    Adlarson, Patrik
    Uppsala University, Disciplinary Domain of Science and Technology, Physics, Department of Physics and Astronomy, Nuclear Physics.
    Biernat, Jacek
    Uppsala University, Disciplinary Domain of Science and Technology, Physics, Department of Physics and Astronomy, Nuclear Physics.
    Ikegami Andersson, Walter
    Uppsala University, Disciplinary Domain of Science and Technology, Physics, Department of Physics and Astronomy, Nuclear Physics.
    Johansson, Tord
    Uppsala University, Disciplinary Domain of Science and Technology, Physics, Department of Physics and Astronomy, Nuclear Physics.
    Kupsc, Andrzej
    Uppsala University, Disciplinary Domain of Science and Technology, Physics, Department of Physics and Astronomy, Nuclear Physics.
    Li, Cui
    Uppsala University, Disciplinary Domain of Science and Technology, Physics, Department of Physics and Astronomy, Nuclear Physics.
    Papenbrock, Michael
    Uppsala University, Disciplinary Domain of Science and Technology, Physics, Department of Physics and Astronomy, Nuclear Physics.
    Pettersson, Joachim
    Uppsala University, Disciplinary Domain of Science and Technology, Physics, Department of Physics and Astronomy, Nuclear Physics.
    Schönning, Karin
    Uppsala University, Disciplinary Domain of Science and Technology, Physics, Department of Physics and Astronomy, Nuclear Physics.
    Thorén, Viktor
    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.
    Zou, J. H.
    Measurements of weak decay asymmetries of Lambda(+)(c) -> pK(S)(0), Lambda pi(+), Sigma(+)pi(0), and Sigma(0)pi(+)2019In: Physical Review D: covering particles, fields, gravitation, and cosmology, ISSN 2470-0010, E-ISSN 2470-0029, Vol. 100, no 7, article id 072004Article in journal (Refereed)
    Abstract [en]

    Using e(+)e(-) -> Lambda(+)(c)(Lambda) over bar (-)(c). production from a 567 pb(-1) data sample collected by BESIII at 4.6 GeV, a full angular analysis is carried out simultaneously on the four decay modes of Lambda(+)(c) -> pK(S)(0), Lambda pi(+), Sigma(+)pi(0), and Sigma(0)pi(+). For the first time, the Lambda(+)(c) transverse polarization is studied in unpolarized e(+)e(-) collisions, where a nonzero effect is observed with a statistical significance of 2.1 sigma. The decay asymmetry parameters of the Lambda(+)(c) weak hadronic decays into pK(S)(0), Lambda pi(+), Sigma(+)pi(0), and Sigma(0)pi(+) are measured to be 0.18 +/- 0.43(stat) +/- 0.14(syst), -0.80 +/- 0.11(stat) +/- 0.02(syst), -0.57 +/- 0.10(stat) +/- 0.07(syst), and -0.73 +/- 0.17(stat) +/- 0.07(syst), respectively. In comparison with previous results, the measurements for the Lambda pi(+) and Sigma(+)pi(0) modes are consistent but with improved precision, while the parameters for the pK(S)(0) and Sigma(+)pi(0) modes are measured for the first time.

  • 12. Ablikim, M.
    et al.
    Adlarson, Patrik
    Uppsala University, Disciplinary Domain of Science and Technology, Physics, Department of Physics and Astronomy, Nuclear Physics.
    Biernat, Jacek
    Uppsala University, Disciplinary Domain of Science and Technology, Physics, Department of Physics and Astronomy, Nuclear Physics.
    Ikegami Andersson, Walter
    Uppsala University, Disciplinary Domain of Science and Technology, Physics, Department of Physics and Astronomy, Nuclear Physics.
    Johansson, Tord
    Uppsala University, Disciplinary Domain of Science and Technology, Physics, Department of Physics and Astronomy, Nuclear Physics.
    Kupsc, Andrzej
    Uppsala University, Disciplinary Domain of Science and Technology, Physics, Department of Physics and Astronomy, Nuclear Physics.
    Li, Cui
    Uppsala University, Disciplinary Domain of Science and Technology, Physics, Department of Physics and Astronomy, Nuclear Physics.
    Papenbrock, Michael
    Uppsala University, Disciplinary Domain of Science and Technology, Physics, Department of Physics and Astronomy, Nuclear Physics.
    Pettersson, Joachim
    Uppsala University, Disciplinary Domain of Science and Technology, Physics, Department of Physics and Astronomy, Nuclear Physics.
    Schönning, Karin
    Uppsala University, Disciplinary Domain of Science and Technology, Physics, Department of Physics and Astronomy, Nuclear Physics.
    Thorén, Viktor
    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.
    Zou, J. H.
    Observation of e(+)e(-) -> pi(+) pi(-)psi(3770) and D-1(2420)(0)(D)over-bar(0) + c.c2019In: Physical Review D: covering particles, fields, gravitation, and cosmology, ISSN 2470-0010, E-ISSN 2470-0029, Vol. 100, no 3, article id 032005Article in journal (Refereed)
    Abstract [en]

    Several intermediate states of the reaction channels e(+)e(-) -> pi(+)pi(-) D-0(D) over bar (0) and e(+)e(-) -> pi(+)pi-D+D- are studied using the data samples collected with the BESIII detector at center-of-mass energies above 4.08 GeV. For the first time in this final state, a psi(3770) signal is seen in the DD invariant mass spectrum, with a statistical significance of 5.2 sigma at root s = 4.42 GeV. There is also evidence for this resonance at root s = 4.26 and 4.36 GeV with statistical significance of 3.2 sigma and 3.3 sigma, respectively. In addition, the Born cross section of e(+)e(-) ->pi(+)pi(-)psi(3770) is measured. The proposed heavy-quark-spin-symmetry partner of the X(3872), the state X-2(4013), is also searched for in the D (D) over bar invariant mass spectra. No obvious signal is found. The upper limit of the Born cross section of the process e(+)e(-) -> rho X-0(2)(4013) combined with the branching fraction is measured. Also, the processes e(+)e(-) -> D-1(2420)(D) over bar c.c. are investigated. The neutral mode with D-1(2420)(0) -> D-0 pi(+)pi(-) is reported with statistical significance of 7.4 sigma at root s = 4.42 GeV for the first time, and evidence with statistical significance of 3.2 sigma and 3.3 sigma at root s = 4.36 and 4.60 GeV is seen, respectively. No evident signal for the process e(+)e(-) -> D-1(2420)(0)(D) over bar (0) + c.c., D-1(2420)(0) -> D*(+)pi(-) is reported. Evidence for e(+)e(-) -> D-1(2420)+D- + c.c., D-1(2420)(+) -> D+pi(+)pi(-) is reported with statistical significance of 3.1 sigma and 3.0 sigma at root s. = 4.36 and 4.42 GeV, respectively.

  • 13. Ablikim, M.
    et al.
    Adlarson, Patrik
    Uppsala University, Disciplinary Domain of Science and Technology, Physics, Department of Physics and Astronomy, Nuclear Physics.
    Biernat, Jacek
    Uppsala University, Disciplinary Domain of Science and Technology, Physics, Department of Physics and Astronomy, Nuclear Physics.
    Ikegami Andersson, Walter
    Uppsala University, Disciplinary Domain of Science and Technology, Physics, Department of Physics and Astronomy, Nuclear Physics.
    Johansson, Tord
    Uppsala University, Disciplinary Domain of Science and Technology, Physics, Department of Physics and Astronomy, Nuclear Physics.
    Kupsc, Andrzej
    Uppsala University, Disciplinary Domain of Science and Technology, Physics, Department of Physics and Astronomy, Nuclear Physics.
    Li, Cui
    Uppsala University, Disciplinary Domain of Science and Technology, Physics, Department of Physics and Astronomy, Nuclear Physics.
    Papenbrock, Michael
    Uppsala University, Disciplinary Domain of Science and Technology, Physics, Department of Physics and Astronomy, Nuclear Physics.
    Pettersson, Joachim
    Uppsala University, Disciplinary Domain of Science and Technology, Physics, Department of Physics and Astronomy, Nuclear Physics.
    Schönning, Karin
    Uppsala University, Disciplinary Domain of Science and Technology, Physics, Department of Physics and Astronomy, Nuclear Physics.
    Thorén, Viktor
    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.
    Zou, J. H.
    Observation of psi(3686) -> p(p)over-bar phi2019In: Physical Review D: covering particles, fields, gravitation, and cosmology, ISSN 2470-0010, E-ISSN 2470-0029, Vol. 99, no 11, article id 112010Article in journal (Refereed)
    Abstract [en]

    Using a data sample of 4.48 x 10(8) psi(3686) events collected with the BESIII detector, we present a first observation of psi(3686) -> p (p) over bar phi, and we measure its branching fraction to be [6.06 +/- 0.38(stat)+/- 0.48(syst)] x 10(-6). In contrast to the earlier discovery of a threshold enhancement in the p (p) over bar -mass spectrum of the channel j/psi -> gamma p (p) over bar, denoted as X(p (p) over bar), we do not find a similar enhancement in psi(3686) -> p (p) over bar phi. An upper limit of 1.82 x 10(-7) at the 90% confidence level on the branching fraction of psi(3686) -> X(p (p) over bar)phi -> p (p) over bar phi is obtained.

  • 14. Ablikim, M.
    et al.
    Adlarson, Patrik
    Uppsala University, Disciplinary Domain of Science and Technology, Physics, Department of Physics and Astronomy, Nuclear Physics.
    Biernat, Jacek
    Uppsala University, Disciplinary Domain of Science and Technology, Physics, Department of Physics and Astronomy, Nuclear Physics.
    Ikegami Andersson, Walter
    Uppsala University, Disciplinary Domain of Science and Technology, Physics, Department of Physics and Astronomy, Nuclear Physics.
    Johansson, Tord
    Uppsala University, Disciplinary Domain of Science and Technology, Physics, Department of Physics and Astronomy, Nuclear Physics.
    Kupsc, Andrzej
    Uppsala University, Disciplinary Domain of Science and Technology, Physics, Department of Physics and Astronomy, Nuclear Physics.
    Li, Cui
    Uppsala University, Disciplinary Domain of Science and Technology, Physics, Department of Physics and Astronomy, Nuclear Physics.
    Papenbrock, Michael
    Uppsala University, Disciplinary Domain of Science and Technology, Physics, Department of Physics and Astronomy, Nuclear Physics.
    Pettersson, Joachim
    Uppsala University, Disciplinary Domain of Science and Technology, Physics, Department of Physics and Astronomy, Nuclear Physics.
    Schönning, Karin
    Uppsala University, Disciplinary Domain of Science and Technology, Physics, Department of Physics and Astronomy, Nuclear Physics.
    Thorén, Viktor
    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.
    Zou, J. H.
    Observation of psi(3886) -> Xi(1530)(-)(Xi)over-bar(1530)(+) and Xi(1530)(-)(Xi)over-bar(+)2019In: Physical Review D: covering particles, fields, gravitation, and cosmology, ISSN 2470-0010, E-ISSN 2470-0029, Vol. 100, no 5, article id 051101Article in journal (Refereed)
    Abstract [en]

    Using 448.1 x 10(6) psi(3686) events collected with the BESIII detector at BEPCII, we employ a single-baryon tagging technique to make the first observation of psi(3686) -> Xi(1530)(-)(Xi) over bar (1530)(+) and Xi(1530)(-)(Xi) over bar (+) decays with a statistical significance of more than 10 sigma and 5.0 sigma, respectively. The branching fractions are measured to be B(psi(3686) -> Xi(1530)(-)(Xi) over bar (1530)(+)) = (11.45 +/- 0.40 +/- 0.59) x 10(-5) and B(psi(3686) -> Xi(1530)(-)(Xi) over bar (+)) = (0.70 +/- 0.11 +/- 0.04) x 10(-5). The angular distribution parameter for psi(3686) -> Xi(1530)(-)(Xi) over bar (1530)(+) is determined to be alpha = 0.40 +/- 0.24 +/- 0.06, which agrees with the theoretical predictions within 1 sigma. The first uncertainties are statistical, and the second systematic.

  • 15. Ablikim, M.
    et al.
    Adlarson, Patrik
    Uppsala University, Disciplinary Domain of Science and Technology, Physics, Department of Physics and Astronomy, Nuclear Physics.
    Biernat, Jacek
    Uppsala University, Disciplinary Domain of Science and Technology, Physics, Department of Physics and Astronomy, Nuclear Physics.
    Ikegami Andersson, Walter
    Uppsala University, Disciplinary Domain of Science and Technology, Physics, Department of Physics and Astronomy, Nuclear Physics.
    Johansson, Tord
    Uppsala University, Disciplinary Domain of Science and Technology, Physics, Department of Physics and Astronomy, Nuclear Physics.
    Kupsc, Andrzej
    Uppsala University, Disciplinary Domain of Science and Technology, Physics, Department of Physics and Astronomy, Nuclear Physics.
    Li, Cui
    Uppsala University, Disciplinary Domain of Science and Technology, Physics, Department of Physics and Astronomy, Nuclear Physics.
    Papenbrock, Michael
    Uppsala University, Disciplinary Domain of Science and Technology, Physics, Department of Physics and Astronomy, Nuclear Physics.
    Pettersson, Joachim
    Uppsala University, Disciplinary Domain of Science and Technology, Physics, Department of Physics and Astronomy, Nuclear Physics.
    Schönning, Karin
    Uppsala University, Disciplinary Domain of Science and Technology, Physics, Department of Physics and Astronomy, Nuclear Physics.
    Thorén, Viktor
    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.
    Zou, J. H.
    Study of e(+)e(-) -> gamma omega J/psi and Observation of X(3872) -> omega J/psi2019In: Physical Review Letters, ISSN 0031-9007, E-ISSN 1079-7114, Vol. 122, no 23, article id 232002Article in journal (Refereed)
    Abstract [en]

    We study the e(+)e(-) -> gamma omega J/psi process using 11.6 fb(-1) e(+)e(-) annihilation data taken at center-of-mass energies from root s = 4.008 GeV to 4.600 GeV with the BESIII detector at the BEPCII storage ring. The X(3872) resonance is observed for the first time in the omega J/psi system with a significance of more than 5 sigma. The relative decay ratio of X(3872) -> omega J/psi and pi(+)pi(-)J/psi is measured to be R = 1.6(-0.3)(+0.4) +/- 0.2, where the first uncertainty is statistical and the second systematic (the same hereafter). The root s-dependent cross section of e(+)e(-) -> gamma X(3872) is also measured and investigated, and it can be described by a single Breit- Wigner resonance, referred to as the Y(4200), with a mass of 4200.6(-13.3)(+7.9) +/- 3.0 MeV/c(2) and a width of 115(-26)(+38) +/- 12 MeV. In addition, to describe the omega J/psi mass distribution above 3.9 GeV/c(2), we need at least one additional Breit-Wigner resonance, labeled as X(3915), in the fit. The mass and width of the X(3915) are determined. The resonant parameters of the X(3915) agree with those of the Y(3940) in B -> K omega J/psi and of the X(3915) in gamma gamma -> omega J/psi observed by the Belle and BABAR experiments within errors.

  • 16. Ablikim, M.
    et al.
    Adlarson, Patrik
    Uppsala University, Disciplinary Domain of Science and Technology, Physics, Department of Physics and Astronomy, Nuclear Physics.
    Biernat, Jacek
    Uppsala University, Disciplinary Domain of Science and Technology, Physics, Department of Physics and Astronomy, Nuclear Physics.
    Ikegami Andersson, Walter
    Uppsala University, Disciplinary Domain of Science and Technology, Physics, Department of Physics and Astronomy, Nuclear Physics.
    Johansson, Tord
    Uppsala University, Disciplinary Domain of Science and Technology, Physics, Department of Physics and Astronomy, Nuclear Physics.
    Kupsc, Andrzej
    Uppsala University, Disciplinary Domain of Science and Technology, Physics, Department of Physics and Astronomy, Nuclear Physics.
    Li, Cui
    Uppsala University, Disciplinary Domain of Science and Technology, Physics, Department of Physics and Astronomy, Nuclear Physics.
    Papenbrock, Michael
    Uppsala University, Disciplinary Domain of Science and Technology, Physics, Department of Physics and Astronomy, Nuclear Physics.
    Pettersson, Joachim
    Uppsala University, Disciplinary Domain of Science and Technology, Physics, Department of Physics and Astronomy, Nuclear Physics.
    Schönning, Karin
    Uppsala University, Disciplinary Domain of Science and Technology, Physics, Department of Physics and Astronomy, Nuclear Physics.
    Thorén, Viktor
    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.
    Zou, J. H.
    Study of the decays D-s(+ )-> (KSK+)-K-0 and (KLK+)-K-02019In: Physical Review D: covering particles, fields, gravitation, and cosmology, ISSN 2470-0010, E-ISSN 2470-0029, Vol. 99, no 11, article id 112005Article in journal (Refereed)
    Abstract [en]

    Using an e(+)e(-) annihilation data sample corresponding to an integrated luminosity of 3.19 fb(-1) and collected at a center-of-mass energy root s = 4.178 GeV with the BESIII detector, we measure the absolute branching fractions B(D-s(+) -> (KSK+)-K-0) = (1.425 +/- 0.038(stat). +/- 0.031(syst).)% and B(D-s(+) -> (KLK+)-K-0) = (1.485 +/- 0.039(stat). +/- 0.046(syst).)%. The branching fraction of D-s(+) -> (KSK+)-K-0 is compatible with the world average and that of D-s(+) -> (KLK+)-K-0 is measured for the first time. We present the first measurement of the K-S(0)-K-L(0) asymmetry in the decays D-s(+) -> (KS,LK+)-K-0, and R((Ds+KS,LK+)-K-0) = B(D-s(+) -> (KSK+)-K-0)-B(D-s(+) -> (KLK+)-K-0)/B(D-s(+) -> (KSK+)-K-0)+B(D-s(+) -> (KLK+)-K-0) = (-2.1 +/- 1.9(stat). +/- 1.6(syst).)%. In addition, we measure the direct CP asymmetries A(CP) (D-s(+/-) -> (KSK +/-)-K-0). (0.6 +/- 2.8(stat). +/- 0.6(syst).)% and A(CP)(D-s(+/-) -> (KLK +/-)-K-0 ) = (-1.1 +/- 2.6(stat). +/- 0.6(syst))%.

  • 17. Ablikim, M.
    et al.
    Adlarson, Patrik
    Uppsala University, Disciplinary Domain of Science and Technology, Physics, Department of Physics and Astronomy, Nuclear Physics.
    Biernat, Jacek
    Uppsala University, Disciplinary Domain of Science and Technology, Physics, Department of Physics and Astronomy, Nuclear Physics.
    Ikegami Andersson, Walter
    Uppsala University, Disciplinary Domain of Science and Technology, Physics, Department of Physics and Astronomy, Nuclear Physics.
    Johansson, Tord
    Uppsala University, Disciplinary Domain of Science and Technology, Physics, Department of Physics and Astronomy, Nuclear Physics.
    Kupsc, Andrzej
    Uppsala University, Disciplinary Domain of Science and Technology, Physics, Department of Physics and Astronomy, Nuclear Physics.
    Li, Cui
    Uppsala University, Disciplinary Domain of Science and Technology, Physics, Department of Physics and Astronomy, Nuclear Physics.
    Papenbrock, Michael
    Uppsala University, Disciplinary Domain of Science and Technology, Physics, Department of Physics and Astronomy, Nuclear Physics.
    Pettersson, Joachim
    Uppsala University, Disciplinary Domain of Science and Technology, Physics, Department of Physics and Astronomy, Nuclear Physics.
    Schönning, Karin
    Uppsala University, Disciplinary Domain of Science and Technology, Physics, Department of Physics and Astronomy, Nuclear Physics.
    Thorén, Viktor
    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.
    Zou, J. H.
    Study of the decays psi(3686) -> gamma chi(cJ) -> gamma(p)over-barK*(+)Lambda + c.c. and psi(3686) -> (p)over-barK*(+) Lambda plus c.c.2019In: Physical Review D: covering particles, fields, gravitation, and cosmology, ISSN 2470-0010, E-ISSN 2470-0029, Vol. 100, no 5, article id 052010Article in journal (Refereed)
    Abstract [en]

    Based on the data sample of 448.1 x 10(6) psi(3686) events collected with the BESIII detector at BEPCII, we present a study of the decays psi(3686) -> gamma chi(cJ) -> gamma(p) over barK*(+)Lambda + c.c. and psi(3686) -> (p) over barK*(+)Lambda + c.c. The branching fractions of chi(cJ )-> (p) over barK*(+)Lambda + c.c. (J = 0, 1, 2) are measured to be (4.8 +/- 0.7 +/- 0.5) x 10(-4), (5.0 +/- 0.5 +/- 0.4) x 10(-4), and (8.2 +/- 0.9 +/- 0.7) x 10(-4), respectively, where the first uncertainties are statistical and the second systematic. The branching fraction of psi(3686) -> (p) over barK*(+)Lambda + c.c. is measured to be (6.3 +/- 0.5 +/- 0.5) x 10(-5). All these decay modes are observed for the first time.

  • 18. Ablikim, M.
    et al.
    Adlarson, Patrik
    Uppsala University, Disciplinary Domain of Science and Technology, Physics, Department of Physics and Astronomy, Nuclear Physics.
    Biernat, Jacek
    Uppsala University, Disciplinary Domain of Science and Technology, Physics, Department of Physics and Astronomy, Nuclear Physics.
    Ikegami Andersson, Walter
    Uppsala University, Disciplinary Domain of Science and Technology, Physics, Department of Physics and Astronomy, Nuclear Physics.
    Johansson, Tord
    Uppsala University, Disciplinary Domain of Science and Technology, Physics, Department of Physics and Astronomy, Nuclear Physics.
    Kupsc, Andrzej
    Uppsala University, Disciplinary Domain of Science and Technology, Physics, Department of Physics and Astronomy, Nuclear Physics.
    Li, Cui
    Uppsala University, Disciplinary Domain of Science and Technology, Physics, Department of Physics and Astronomy, Nuclear Physics.
    Papenbrock, Michael
    Uppsala University, Disciplinary Domain of Science and Technology, Physics, Department of Physics and Astronomy, Nuclear Physics.
    Pettersson, Joachim
    Uppsala University, Disciplinary Domain of Science and Technology, Physics, Department of Physics and Astronomy, Nuclear Physics.
    Schönning, Karin
    Uppsala University, Disciplinary Domain of Science and Technology, Physics, Department of Physics and Astronomy, Nuclear Physics.
    Thorén, Viktor
    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.
    Zou, J.H.
    Partial-wave analysis of J/psi -> K+ K- pi(0)2019In: Physical Review D: covering particles, fields, gravitation, and cosmology, ISSN 2470-0010, E-ISSN 2470-0029, Vol. 100, no 3, article id 032004Article in journal (Refereed)
    Abstract [en]

    A partial-wave analysis of the decay J/psi -> K+ K- pi(0) has been made using (223.7 +/- 1.4) x 10(6) J/psi events collected with the BESIII detector in 2009. The analysis, which is performed within the isobar-model approach, reveals contributions from K-2* (1430)(+/-), K-2* (1980)(+/-) and K-4* (2045)(+/-) decaying to K-+/-pi(0). The two latter states are observed in J/psi decays for the first time. Two resonance signals decaying to K+ K- are also observed. These contributions cannot be reliably identified and their possible interpretations are discussed. The measured branching fraction B(J/psi -> K+ K- pi(0)) of (2.88 +/- 0.01 +/- 0.12) x 10(-3) is more precise than previous results. Branching fractions for the reported contributions are presented as well. The results of the partial-wave analysis differ significantly from those previously obtained by BESII and BABAR.

  • 19. Ablikim, M.
    et al.
    Adlarson, Patrik
    Uppsala University, Disciplinary Domain of Science and Technology, Physics, Department of Physics and Astronomy, Nuclear Physics.
    Biernat, Jacek
    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.
    Li, Cui
    Uppsala University, Disciplinary Domain of Science and Technology, Physics, Department of Physics and Astronomy, Nuclear Physics.
    Papenbrock, Michael
    Uppsala University, Disciplinary Domain of Science and Technology, Physics, Department of Physics and Astronomy, Nuclear Physics.
    Pettersson, Joachim
    Uppsala University, Disciplinary Domain of Science and Technology, Physics, Department of Physics and Astronomy, Nuclear Physics.
    Schönning, Karin
    Uppsala University, Disciplinary Domain of Science and Technology, Physics, Department of Physics and Astronomy, Nuclear Physics.
    Thorén, Viktor
    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.
    Zou, J. H.
    Measurement of branching fractions for D meson decaying into phi meson and a pseudoscalar meson2019In: Physics Letters B, ISSN 0370-2693, E-ISSN 1873-2445, Vol. 798, article id 135017Article in journal (Refereed)
    Abstract [en]

    The four decay modes D-0 -> phi pi(0), D-0 -> phi eta, D+ -> phi pi(+), and D+ up arrow phi K+ are studied by using a data sample taken at the centre-of-mass energy root s = 3.773 GeVwith the BESIII detector, corresponding to an integrated luminosity of 2.93 fb(-1). The branching fractions of the first three decay modes are measured to be B(D-0 -> phi pi(0)) = (1.168 +/- 0.028 +/- 0.028) x 10(-3), B(D-0 -> phi eta) = (1.81 +/- 0.46 +/- 0.06) x 10(-4), and B(D+ -> phi pi(+)) = (5.70 +/- 0.05 +/- 0.13) x 10(-3), respectively, where the first uncertainties are statistical and the second are systematic. In addition, the upper limit of the branching fraction for D+ -> phi K+ is given to be 2.1 x 10(-5) at the 90% confidence level. The ratio of B(D-0 -> phi pi(0)) to B(D+ -> phi pi(+)) is calculated to be (20.49 +/- 0.50 +/- 0.45)%, which is consistent with the theoretical prediction based on isospin symmetry between these two decay modes. 

  • 20.
    Adlarson, Patrik
    Uppsala University, Disciplinary Domain of Science and Technology, Physics, Department of Physics and Astronomy, Nuclear Physics.
    Studies of the Decay η→π+π-π0 with WASA-at-COSY2012Doctoral thesis, monograph (Other academic)
    Abstract [en]

    In 2008 a large statistics sample of approximately 1·107 η-decays has been collected with the WASA detector at COSY using the pd→3Heη reaction at the beam kinetic energy of 1 GeV. These data are being used to study the not so rare η decays involving charged pions, like η→π+π-π0. This decay proceeds mainly via a strong isospin violating contribution, where the decay width is proportional to the light quark mass difference squared, (md-mu)2. In addition this decay can be used to search for C-violating effects. The analysis is presented and the Dalitz plot parameters with statistical and systematical uncertainties are determined from a sample of 1.33·105 η→π+π-π0 events in the Dalitz plot. The asymmetry parameters with statistical uncertainties are presented which show no evidence of C-violation.

  • 21.
    Adlarson, Patrik
    Uppsala University, Disciplinary Domain of Science and Technology, Physics, Department of Physics and Astronomy, Nuclear Physics.
    Study of the decay eta -> pi(+)pi(-)pi(0) with WASA-at-COSY2012In: Physica Scripta, ISSN 0031-8949, E-ISSN 1402-4896, Vol. T150, p. 014001-Article in journal (Refereed)
    Abstract [en]

    Recently, a large statistics sample of approximately 3 x 10(7) eta decays was collected with the Wide Angle Shower Apparatus (WASA) detector at COoler SYnchrotron (COSY) using the pd -> He-3 eta reaction at the proton kinetic energy of 1 GeV. These data are being used to study the not so rare eta decays involving charged pions, such as eta -> pi(+)pi(-)pi(0). This decay proceeds mainly via a strong isospin violating contribution, where the decay width is proportional to the light quark mass difference squared, (m(d) - m(u))(2). The status of the analysis is presented, which preliminarily gives 1.8 x 10(5) eta -> pi(+)pi(-)pi(0) candidates in the Dalitz plot.

  • 22.
    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.

  • 23.
    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.

  • 24.
    Adlarson, Patrik
    et al.
    Uppsala University, Disciplinary Domain of Science and Technology, Physics, Department of Physics and Astronomy, Nuclear Physics.
    Augustyniak, W.
    Natl Ctr Nucl Res, Dept Nucl Phys, Ul Hoza 69, PL-00681 Warsaw, Poland..
    Bardan, W.
    Jagiellonian Univ, Inst Phys, Prof Stanislawa Lojasiewicza 11, PL-30348 Krakow, Poland..
    Bashkanov, M.
    Univ Edinburgh, Sch Phys & Astron, James Clerk Maxwell Bldg,Peter Guthrie Tait Rd, Edinburgh EH9 3FD, Midlothian, Scotland..
    Bass, S. D.
    Bergmann, F. S.
    Westfal Wilhelms Univ Munster, Inst Kernphys, Wilhelm Klemm Str 9, D-48149 Munster, Germany..
    Berlowski, M.
    Natl Ctr Nucl Res, High Energy Phys Dept, Ul Hoza 69, PL-00681 Warsaw, Poland..
    Bondar, A.
    SB RAS, Budker Inst Nucl Phys, 11 Aka Lavrentieva Prospect, Novosibirsk 630090, Russia.;Novosibirsk State Univ, 2 Pirogova Str, Novosibirsk 630090, Russia..
    Buscher, M.
    Forschungszentrum Julich, Inst Kernphys, D-52425 Julich, Germany.;Forschungszentrum Julich, PGI Elekt Eigensch 6, Peter Grunberg Inst, D-52425 Julich, Germany.;Heinrich Heine Univ Dusseldorf, Inst Laser & Plasmaphys, Univ Str 1, D-40225 Dusseldorf, Germany..
    Calén, Hans
    Uppsala University, Disciplinary Domain of Science and Technology, Physics, Department of Physics and Astronomy, Nuclear Physics.
    Ciepal, I.
    Polish Acad Sci, Henryk Niewodniczanski Inst Nucl Phys, 152 Radzikowskiego St, PL-31342 Krakow, Poland..
    Clement, H.
    Eberhard Karls Univ Tubingen, Phys Inst, Morgenstelle 14, D-72076 Tubingen, Germany.;Univ Tubingen, Phys Inst, Kepler Ctr Astro & Teilchenphys, D-72076 Tubingen, Germany..
    Czerwinski, E.
    Jagiellonian Univ, Inst Phys, Prof Stanislawa Lojasiewicza 11, PL-30348 Krakow, Poland..
    Demmich, K.
    Westfal Wilhelms Univ Munster, Inst Kernphys, Wilhelm Klemm Str 9, D-48149 Munster, Germany..
    Engels, R.
    Forschungszentrum Julich, Inst Kernphys, D-52425 Julich, Germany..
    Erven, A.
    Erven, W.
    Forschungszentrum Julich, ZentralInst Engn Elekt & Analyt, D-52425 Julich, Germany..
    Eyrich, W.
    Friedrich Alexander Univ Erlangen Nurnberg, Phys Inst, Erwin Rommel Str 1, D-91058 Erlangen, Germany..
    Fedorets, P.
    Forschungszentrum Julich, Inst Kernphys, D-52425 Julich, Germany.;State Sci Ctr Russian Federat, Inst Theoret & Expt Phys, Bolshaya Cheremushkinskaya 25, Moscow 117218, Russia..
    Fohl, K.
    Justus Liebig Univ Giessen, Phys Inst 2, Heinrich Buff Ring 16, D-35392 Giessen, Germany..
    Fransson, Kjell
    Uppsala University, Disciplinary Domain of Science and Technology, Physics, Department of Physics and Astronomy, Nuclear Physics.
    Goldenbaum, F.
    Forschungszentrum Julich, Inst Kernphys, D-52425 Julich, Germany..
    Goswami, A.
    Forschungszentrum Julich, Inst Kernphys, D-52425 Julich, Germany.;Indian Inst Technol Indore, Dept Phys, Indore 453552, Madhya Pradesh, India..
    Grigoryev, K.
    Forschungszentrum Julich, Inst Kernphys, D-52425 Julich, Germany.;Petersburg Nucl Phys Inst, High Energy Phys Div, Orlova Rosha 2, Gatchina, Russia..
    Gullström, Carl-Oskar
    Uppsala University, Disciplinary Domain of Science and Technology, Physics, Department of Physics and Astronomy, Nuclear Physics.
    Heijkenskjöld, Lena
    Uppsala University, Disciplinary Domain of Science and Technology, Physics, Department of Physics and Astronomy, Nuclear Physics. Institut für Kernphysik, Johannes Gutenberg-Universität Mainz, Mainz, Germany.
    Hejny, V.
    Forschungszentrum Julich, Inst Kernphys, D-52425 Julich, Germany..
    Husken, N.
    Westfal Wilhelms Univ Munster, Inst Kernphys, Wilhelm Klemm Str 9, D-48149 Munster, Germany..
    Jarczyk, L.
    Jagiellonian Univ, Inst Phys, Prof Stanislawa Lojasiewicza 11, PL-30348 Krakow, Poland..
    Johansson, Tord
    Uppsala University, Disciplinary Domain of Science and Technology, Physics, Department of Physics and Astronomy, Nuclear Physics.
    Kamys, B.
    Jagiellonian Univ, Inst Phys, Prof Stanislawa Lojasiewicza 11, PL-30348 Krakow, Poland..
    Kemmerling, G.
    Forschungszentrum Julich, ZentralInst Engn Elekt & Analyt, D-52425 Julich, Germany..
    Khatri, G.
    Jagiellonian Univ, Inst Phys, Prof Stanislawa Lojasiewicza 11, PL-30348 Krakow, Poland.;Harvard Univ, Dept Phys, 17 Oxford St, Cambridge, MA 02138 USA..
    Khoukaz, A.
    Westfal Wilhelms Univ Munster, Inst Kernphys, Wilhelm Klemm Str 9, D-48149 Munster, Germany..
    Khreptak, O.
    Jagiellonian Univ, Inst Phys, Prof Stanislawa Lojasiewicza 11, PL-30348 Krakow, Poland..
    Kirillov, D. A.
    Joint Inst Nucl Phys, Veksler & Baldin Lab High Energiy Phys, 6 Joliot Curie, Dubna 141980, Russia..
    Kistryn, S.
    Kleines, H.
    Forschungszentrum Julich, Julich Ctr Neutron Sci JCNS, D-52425 Julich, Germany..
    Klos, B.
    Univ Silesia, August Chelkowski Inst Phys, Uniwersytecka 4, PL-40007 Katowice, Poland..
    Krzemien, W.
    Kulessa, P.
    Polish Acad Sci, Henryk Niewodniczanski Inst Nucl Phys, 152 Radzikowskiego St, PL-31342 Krakow, Poland..
    Kupsc, Andrzej
    Uppsala University, Disciplinary Domain of Science and Technology, Physics, Department of Physics and Astronomy, Nuclear Physics. Natl Ctr Nucl Res, High Energy Phys Dept, Warsaw, Poland.
    Kuzmin, A.
    SB RAS, Budker Inst Nucl Phys, 11 Aka Lavrentieva Prospect, Novosibirsk 630090, Russia..
    Lalwani, K.
    Malaviya Natl Inst Technol Jaipur, Dept Phys, JLN Marg, Jaipur 302017, Rajasthan, India..
    Lersch, D.
    Forschungszentrum Julich, Inst Kernphys, D-52425 Julich, Germany..
    Lorentz, B.
    Forschungszentrum Julich, Inst Kernphys, D-52425 Julich, Germany..
    Magiera, A.
    Maier, R.
    Forschungszentrum Julich, Inst Kernphys, D-52425 Julich, Germany.;Forschungszentrum Julich, Julich Aachen Res Alliance, FAME, JARA, D-52425 Julich, Germany.;Rhein Westfal TH Aachen, D-52056 Aachen, Germany..
    Marciniewski, Pawel
    Uppsala University, Disciplinary Domain of Science and Technology, Physics, Department of Physics and Astronomy, Nuclear Physics.
    Marianski, B.
    Morsch, H. -P
    Moskal, P.
    Ohm, H.
    Forschungszentrum Julich, Inst Kernphys, D-52425 Julich, Germany..
    Parol, W.
    Polish Acad Sci, Henryk Niewodniczanski Inst Nucl Phys, 152 Radzikowskiego St, PL-31342 Krakow, Poland..
    del Rio, E. Perez
    Eberhard Karls Univ Tubingen, Phys Inst, Morgenstelle 14, D-72076 Tubingen, Germany.;Univ Tubingen, Phys Inst, Kepler Ctr Astro & Teilchenphys, D-72076 Tubingen, Germany.;Ist Nazl Fis Nucl, Lab Nazl Frascati, Via E Fermi 40, I-00044 Frascati, Roma, Italy..
    Piskunov, N. M.
    Prasuhn, D.
    Forschungszentrum Julich, Inst Kernphys, D-52425 Julich, Germany..
    Pszczel, Damian
    Uppsala University, Disciplinary Domain of Science and Technology, Physics, Department of Physics and Astronomy, Nuclear Physics. Natl Ctr Nucl Res, High Energy Phys Dept, Warsaw, Poland.
    Pysz, K.
    Polish Acad Sci, Henryk Niewodniczanski Inst Nucl Phys, 152 Radzikowskiego St, PL-31342 Krakow, Poland..
    Pyszniak, A.
    Uppsala University, Disciplinary Domain of Science and Technology, Physics, Department of Physics and Astronomy, Nuclear Physics.
    Ritman, J.
    Forschungszentrum Julich, Julich Aachen Res Alliance, FAME, JARA, D-52425 Julich, Germany.;Rhein Westfal TH Aachen, D-52056 Aachen, Germany.;Ruhr Univ Bochum, Inst Expt Phys 1, Univ Str 150, D-44780 Bochum, Germany..
    Roy, A.
    Rudy, Z.
    Rundel, O.
    Sawant, S.
    Indian Inst Technol, Dept Phys, Bombay 400076, Maharashtra, India..
    Schadmand, S.
    Schatti-Ozerianska, I.
    Jagiellonian Univ, Inst Phys, Prof Stanislawa Lojasiewicza 11, PL-30348 Krakow, Poland..
    Sefzick, T.
    Forschungszentrum Julich, Inst Kernphys, D-52425 Julich, Germany..
    Serdyuk, V.
    Forschungszentrum Julich, Inst Kernphys, D-52425 Julich, Germany..
    Shwartz, B.
    Sitterberg, K.
    Skorodko, T.
    Eberhard Karls Univ Tubingen, Phys Inst, Morgenstelle 14, D-72076 Tubingen, Germany.;Univ Tubingen, Phys Inst, Kepler Ctr Astro & Teilchenphys, D-72076 Tubingen, Germany.;Tomsk State Univ, Dept Phys, 36 Lenina Ave, Tomsk 634050, Russia..
    Skurzok, M.
    Jagiellonian Univ, Inst Phys, Prof Stanislawa Lojasiewicza 11, PL-30348 Krakow, Poland..
    Smyrski, J.
    Sopov, V.
    Stassen, R.
    Forschungszentrum Julich, Inst Kernphys, D-52425 Julich, Germany..
    Stepaniak, J.
    Stephan, E.
    Sterzenbach, G.
    Forschungszentrum Julich, Inst Kernphys, D-52425 Julich, Germany..
    Stockhorst, H.
    Forschungszentrum Julich, Inst Kernphys, D-52425 Julich, Germany..
    Stroeher, H.
    Forschungszentrum Julich, Inst Kernphys, D-52425 Julich, Germany.;Forschungszentrum Julich, Julich Aachen Res Alliance, FAME, JARA, D-52425 Julich, Germany.;Rhein Westfal TH Aachen, D-52056 Aachen, Germany..
    Szczurek, A.
    Polish Acad Sci, Henryk Niewodniczanski Inst Nucl Phys, 152 Radzikowskiego St, PL-31342 Krakow, Poland..
    Trzcinski, A.
    Natl Ctr Nucl Res, Dept Nucl Phys, Ul Hoza 69, PL-00681 Warsaw, Poland..
    Wolke, Magnus
    Uppsala University, Disciplinary Domain of Science and Technology, Physics, Department of Physics and Astronomy, Nuclear Physics.
    Wronska, A.
    Jagiellonian Univ, Inst Phys, Prof Stanislawa Lojasiewicza 11, PL-30348 Krakow, Poland..
    Wustner, P.
    Forschungszentrum Julich, ZentralInst Engn Elekt & Analyt, D-52425 Julich, Germany..
    Yamamoto, A.
    High Energy Accelerator Res Org KEK, Tsukuba, Ibaraki 3050801, Japan..
    Zabierowski, J.
    Natl Ctr Nucl Res, Dept Astrophys, PL-90950 Lodz, Poland..
    Zielinski, M. J.
    Zlomanczuk, Jozef
    Uppsala University, Disciplinary Domain of Science and Technology, Physics, Department of Physics and Astronomy, Nuclear Physics.
    Zupranski, P.
    Natl Ctr Nucl Res, Dept Nucl Phys, Ul Hoza 69, PL-00681 Warsaw, Poland..
    Zurek, M.
    Forschungszentrum Julich, Inst Kernphys, D-52425 Julich, Germany..
    Spin Dependence of eta Meson Production in Proton-Proton Collisions Close to Threshold2018In: Physical Review Letters, ISSN 0031-9007, E-ISSN 1079-7114, Vol. 120, no 2, article id 022002Article in journal (Refereed)
    Abstract [en]

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

  • 25.
    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.

  • 26.
    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. 

  • 27.
    Adlarson, Patrik
    et al.
    Uppsala University, Disciplinary Domain of Science and Technology, Physics, Department of Physics and Astronomy, Nuclear Physics.
    Augustyniak, W.
    Natl Ctr Nucl Res, Dept Nucl Phys, Ul Hoza 69, PL-00681 Warsaw, Poland..
    Bardan, W.
    Jagiellonian Univ, Inst Phys, Prof Stanislawa Lojasiewicza 11, PL-30348 Krakow, Poland..
    Bashkanov, M.
    Univ Edinburgh, Sch Phys & Astron, James Clerk Maxwell Bldg,Peter Guthrie Tait Rd, Edinburgh EH9 3FD, Midlothian, Scotland..
    Bergmann, F. S.
    Westfalische Wilhelms Univ Munster, Inst Kernphys, Wilhelm Klemm Str 9, D-48149 Munster, Germany..
    Berlowski, M.
    Natl Ctr Nucl Res, High Energy Phys Dept, Ul Hoza 69, PL-00681 Warsaw, Poland..
    Bhatt, H.
    Indian Inst Technol, Dept Phys, Bombay 400076, Maharashtra, India..
    Bondar, A.
    SB RAS, Budker Inst Nucl Phys, 11 Akademika Lavrentieva Prospect, Novosibirsk 630090, Russia.;Novosibirsk State Univ, 2 Pirogova Str, Novosibirsk 630090, Russia..
    Buescher, M.
    Forschungszentrum Julich, Inst Kernphys, D-52425 Julich, Germany.;Forschungszentrum Julich, Peter Grunberg Inst, PGI Elekt Eigenschaften 6, D-52425 Julich, Germany.;Heinrich Heine Univ Dusseldorf, Inst Laser & Plasmaphys, Univ Str 1, D-40225 Dusseldorf, Germany..
    Calen, H.
    Uppsala Univ, Dept Phys & Astron, Div Nucl Phys, Box 516, S-75120 Uppsala, Sweden..
    Ciepal, I.
    Polish Acad Sci, Henryk Niewodniczanski Inst Nucl Phys, 152 Radzikowskiego St, PL-31342 Krakow, Poland..
    Clement, H.
    Eberhard Karls Univ Tubingen, Phys Inst, Morgenstelle 14, D-72076 Tubingen, Germany.;Eberhard Karls Univ Tubingen, Kepler Ctr Astro & Particle Phys, Morgenstelle 14, D-72076 Tubingen, Germany..
    Czerwinski, E.
    Jagiellonian Univ, Inst Phys, Prof Stanislawa Lojasiewicza 11, PL-30348 Krakow, Poland..
    Demmich, K.
    Westfalische Wilhelms Univ Munster, Inst Kernphys, Wilhelm Klemm Str 9, D-48149 Munster, Germany..
    Engels, R.
    Forschungszentrum Julich, Inst Kernphys, D-52425 Julich, Germany..
    Erven, A.
    Forschungszentrum Julich, Zent Inst Engn Elekt & Analyt, D-52425 Julich, Germany..
    Erven, W.
    Forschungszentrum Julich, Zent Inst Engn Elekt & Analyt, D-52425 Julich, Germany..
    Eyrich, W.
    Friedrich Alexander Univ Erlangen Nurnberg, Phys Inst, Erwin Rommel Str 1, D-91058 Erlangen, Germany..
    Fedorets, P.
    State Sci Ctr Russian Federat, Inst Theoret & Expt Phys, Bolshaya Cheremushkinskaya 25, Moscow 117218, Russia..
    Foehl, K.
    Justus Liebig Univ Giessen, Phys Inst 2, Heinrich Buff Ring 16, D-35392 Giessen, Germany..
    Fransson, Kjell
    Uppsala University, Disciplinary Domain of Science and Technology, Physics, Department of Physics and Astronomy, Nuclear Physics.
    Goldenbaum, F.
    Forschungszentrum Julich, Inst Kernphys, D-52425 Julich, Germany..
    Goswami, A.
    Indian Inst Technol Indore, Dept Phys, Khandwa Rd, Indore 452017, Madhya Pradesh, India..
    Grigoryev, K.
    Petersburg Nucl Phys Inst, High Energy Phys Div, Orlova Rosha 2, Gatchina 188300, Russia.;Rhein Westfal TH Aachen, Phys Inst B 3, Physikzentrum, D-52056 Aachen, Germany..
    Gullström, Carl-Oskar
    Uppsala University, Disciplinary Domain of Science and Technology, Physics, Department of Physics and Astronomy, Nuclear Physics.
    Heijkenskjöld, Lena
    Uppsala University, Disciplinary Domain of Science and Technology, Physics, Department of Physics and Astronomy, Nuclear Physics.
    Hejny, V.
    Forschungszentrum Julich, Inst Kernphys, D-52425 Julich, Germany..
    Huesken, N.
    Westfalische Wilhelms Univ Munster, Inst Kernphys, Wilhelm Klemm Str 9, D-48149 Munster, Germany..
    Jarczyk, L.
    Jagiellonian Univ, Inst Phys, Prof Stanislawa Lojasiewicza 11, PL-30348 Krakow, Poland..
    Johansson, Tord
    Uppsala University, Disciplinary Domain of Science and Technology, Physics, Department of Physics and Astronomy, Nuclear Physics.
    Kamys, B.
    Jagiellonian Univ, Inst Phys, Prof Stanislawa Lojasiewicza 11, PL-30348 Krakow, Poland..
    Kemmerling, G.
    Forschungszentrum Julich, JCNS, D-52425 Julich, Germany..
    Khatri, G.
    Jagiellonian Univ, Inst Phys, Prof Stanislawa Lojasiewicza 11, PL-30348 Krakow, Poland.;Harvard Univ, Dept Phys, 17 Oxford St, Cambridge, MA 02138 USA..
    Khoukaz, A.
    Westfalische Wilhelms Univ Munster, Inst Kernphys, Wilhelm Klemm Str 9, D-48149 Munster, Germany..
    Khreptak, O.
    Jagiellonian Univ, Inst Phys, Prof Stanislawa Lojasiewicza 11, PL-30348 Krakow, Poland..
    Kirillov, D. A.
    Joint Inst Nucl Res, Veksler & Baldin Lab High Energiy Phys, Joliot Curie 6, Dubna 141980, Moscow, Russia..
    Kistryn, S.
    Jagiellonian Univ, Inst Phys, Prof Stanislawa Lojasiewicza 11, PL-30348 Krakow, Poland..
    Kleines, H.
    Forschungszentrum Julich, Zent Inst Engn Elekt & Analyt, D-52425 Julich, Germany..
    Klos, B.
    Univ Silesian, August Chelkowski Inst Phys, Uniwersytecka 4, PL-40007 Katowice, Poland..
    Krzemien, W.
    Jagiellonian Univ, Inst Phys, Prof Stanislawa Lojasiewicza 11, PL-30348 Krakow, Poland..
    Kulessa, P.
    Polish Acad Sci, Henryk Niewodniczanski Inst Nucl Phys, 152 Radzikowskiego St, PL-31342 Krakow, Poland..
    Kupsc, Andrzej
    Uppsala University, Disciplinary Domain of Science and Technology, Physics, Department of Physics and Astronomy, Nuclear Physics. Natl Ctr Nucl Res, High Energy Phys Dept, Ul Hoza 69, PL-00681 Warsaw, Poland..
    Kuzmin, A.
    Novosibirsk State Univ, 2 Pirogova Str, Novosibirsk 630090, Russia..
    Lalwani, K.
    Malaviya Natl Inst Technol Jaipur, Dept Phys, Jaipur 302017, Rajasthan, India..
    Lersch, D.
    Forschungszentrum Julich, Inst Kernphys, D-52425 Julich, Germany..
    Lorentz, B.
    Forschungszentrum Julich, Inst Kernphys, D-52425 Julich, Germany..
    Magiera, A.
    Jagiellonian Univ, Inst Phys, Prof Stanislawa Lojasiewicza 11, PL-30348 Krakow, Poland..
    Maier, R.
    Forschungszentrum Julich, Inst Kernphys, D-52425 Julich, Germany.;JARA FAME, Julich Aachen Res Alliance, Forschungszentrum Julich, Julich, Germany.;Rhein Westfal TH Aachen, D-52056 Aachen, Germany..
    Marciniewski, Pawel
    Uppsala University, Disciplinary Domain of Science and Technology, Physics, Department of Physics and Astronomy, Nuclear Physics.
    Marianski, B.
    Natl Ctr Nucl Res, Dept Nucl Phys, Ul Hoza 69, PL-00681 Warsaw, Poland..
    Morsch, H. -P
    Moskal, P.
    Jagiellonian Univ, Inst Phys, Prof Stanislawa Lojasiewicza 11, PL-30348 Krakow, Poland..
    Ohm, H.
    Forschungszentrum Julich, Inst Kernphys, D-52425 Julich, Germany..
    Parol, W.
    Polish Acad Sci, Henryk Niewodniczanski Inst Nucl Phys, 152 Radzikowskiego St, PL-31342 Krakow, Poland..
    del Rio, E. Perez
    Eberhard Karls Univ Tubingen, Phys Inst, Morgenstelle 14, D-72076 Tubingen, Germany.;Eberhard Karls Univ Tubingen, Kepler Ctr Astro & Particle Phys, Morgenstelle 14, D-72076 Tubingen, Germany.;INFN, Lab Nazl Frascati, Via Fermi 40, I-00044 Rome, Italy..
    Piskunov, N. M.
    Joint Inst Nucl Res, Veksler & Baldin Lab High Energiy Phys, Joliot Curie 6, Dubna 141980, Moscow, Russia..
    Prasuhn, D.
    Forschungszentrum Julich, Inst Kernphys, D-52425 Julich, Germany..
    Pszczel, Damian
    Uppsala University, Disciplinary Domain of Science and Technology, Physics, Department of Physics and Astronomy, Nuclear Physics. Natl Ctr Nucl Res, High Energy Phys Dept, Ul Hoza 69, PL-00681 Warsaw, Poland..
    Pysz, K.
    Polish Acad Sci, Henryk Niewodniczanski Inst Nucl Phys, 152 Radzikowskiego St, PL-31342 Krakow, Poland..
    Pyszniak, A.
    Uppsala University, Disciplinary Domain of Science and Technology, Physics, Department of Physics and Astronomy, Nuclear Physics. Jagiellonian Univ, Inst Phys, Prof Stanislawa Lojasiewicza 11, PL-30348 Krakow, Poland..
    Ritman, J.
    JARA FAME, Julich Aachen Res Alliance, Forschungszentrum Julich, Julich, Germany.;Rhein Westfal TH Aachen, D-52056 Aachen, Germany.;Ruhr Univ Bochum, Inst Expt Phys 1, Univ Str 150, D-44780 Bochum, Germany..
    Roy, A.
    Indian Inst Technol Indore, Dept Phys, Khandwa Rd, Indore 452017, Madhya Pradesh, India..
    Rudy, Z.
    Jagiellonian Univ, Inst Phys, Prof Stanislawa Lojasiewicza 11, PL-30348 Krakow, Poland..
    Rundel, O.
    Jagiellonian Univ, Inst Phys, Prof Stanislawa Lojasiewicza 11, PL-30348 Krakow, Poland..
    Sawant, S.
    Forschungszentrum Julich, Inst Kernphys, D-52425 Julich, Germany..
    Schadmand, S.
    Forschungszentrum Julich, Inst Kernphys, D-52425 Julich, Germany..
    Schatti-Ozerianska, I.
    Jagiellonian Univ, Inst Phys, Prof Stanislawa Lojasiewicza 11, PL-30348 Krakow, Poland..
    Sefzick, T.
    Forschungszentrum Julich, Inst Kernphys, D-52425 Julich, Germany..
    Serdyuk, V.
    Forschungszentrum Julich, Inst Kernphys, D-52425 Julich, Germany..
    Shwartz, B.
    Novosibirsk State Univ, 2 Pirogova Str, Novosibirsk 630090, Russia..
    Sitterberg, K.
    Westfalische Wilhelms Univ Munster, Inst Kernphys, Wilhelm Klemm Str 9, D-48149 Munster, Germany..
    Skorodko, T.
    Eberhard Karls Univ Tubingen, Phys Inst, Morgenstelle 14, D-72076 Tubingen, Germany.;Tomsk State Univ, Dept Phys, 36 Lenina Ave, Tomsk 634050, Russia..
    Skurzok, M.
    Jagiellonian Univ, Inst Phys, Prof Stanislawa Lojasiewicza 11, PL-30348 Krakow, Poland..
    Smyrski, J.
    Jagiellonian Univ, Inst Phys, Prof Stanislawa Lojasiewicza 11, PL-30348 Krakow, Poland..
    Sopov, V.
    State Sci Ctr Russian Federat, Inst Theoret & Expt Phys, Bolshaya Cheremushkinskaya 25, Moscow 117218, Russia..
    Stassen, R.
    Forschungszentrum Julich, Inst Kernphys, D-52425 Julich, Germany..
    Stepaniak, J.
    Natl Ctr Nucl Res, High Energy Phys Dept, Ul Hoza 69, PL-00681 Warsaw, Poland..
    Stephan, E. u
    Univ Silesian, August Chelkowski Inst Phys, Uniwersytecka 4, PL-40007 Katowice, Poland..
    Sterzenbach, G.
    Forschungszentrum Julich, Inst Kernphys, D-52425 Julich, Germany..
    Stockhorst, H.
    Forschungszentrum Julich, Inst Kernphys, D-52425 Julich, Germany..
    Stroeher, H.
    Forschungszentrum Julich, Inst Kernphys, D-52425 Julich, Germany.;JARA FAME, Julich Aachen Res Alliance, Forschungszentrum Julich, Julich, Germany.;Rhein Westfal TH Aachen, D-52056 Aachen, Germany..
    Szczurek, A.
    Polish Acad Sci, Henryk Niewodniczanski Inst Nucl Phys, 152 Radzikowskiego St, PL-31342 Krakow, Poland..
    Trzcinski, A.
    Natl Ctr Nucl Res, Dept Nucl Phys, Ul Hoza 69, PL-00681 Warsaw, Poland..
    Varma, R.
    Wolke, Magnus
    Uppsala University, Disciplinary Domain of Science and Technology, Physics, Department of Physics and Astronomy, Nuclear Physics.
    Wronska, A.
    Jagiellonian Univ, Inst Phys, Prof Stanislawa Lojasiewicza 11, PL-30348 Krakow, Poland..
    Wuestner, P.
    Forschungszentrum Julich, Zent Inst Engn Elekt & Analyt, D-52425 Julich, Germany..
    Yamamoto, A.
    KEK, High Energy Accelerator Res Org, Tsukuba, Ibaraki 3050801, Japan..
    Zabierowski, J.
    Natl Ctr Nucl Res, Dept Astrophys, Box 447, PL-90950 Lodz, Poland. Rheinische Friedrich Wilhelms Univ Bonn, Helmholtz Inst Strahlen & Kernphys, Nussallee 14-16, D-53115 Bonn, Germany..
    Zielinski, M. J.
    Jagiellonian Univ, Inst Phys, Prof Stanislawa Lojasiewicza 11, PL-30348 Krakow, Poland..
    Zlomanczuk, Jozef
    Uppsala University, Disciplinary Domain of Science and Technology, Physics, Department of Physics and Astronomy, Nuclear Physics.
    Zupranski, P.
    Natl Ctr Nucl Res, Dept Nucl Phys, Ul Hoza 69, PL-00681 Warsaw, Poland..
    Zurekj, M.
    Forschungszentrum Julich, Inst Kernphys, D-52425 Julich, Germany..
    Isoscalar single-pion production in the region of Roper and d*(2380) resonances2017In: Physics Letters B, ISSN 0370-2693, E-ISSN 1873-2445, Vol. 774, p. 599-607Article in journal (Refereed)
    Abstract [en]

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

  • 28.
    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.

  • 29.
    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.

  • 30.
    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.

  • 31.
    Adlarson, Patrik
    et al.
    Uppsala University, Disciplinary Domain of Science and Technology, Physics, Department of Physics and Astronomy, Nuclear Physics. Johannes Gutenberg Univ Mainz, Inst Kernphys, Johann Joachim Becher Weg 45, D-55128 Mainz, Germany..
    Augustyniak, W.
    Natl Ctr Nucl Res, Dept Nucl Phys, Ul Hoza 69, PL-00681 Warsaw, Poland..
    Bardan, W.
    Jagiellonian Univ, Inst Phys, Ul Reymonta 4, PL-30059 Krakow, Poland..
    Bashkanov, M.
    Eberhard Karls Univ Tubingen, Inst Phys, Morgenstelle 14, D-72076 Tubingen, Germany.;Univ Tubingen, Inst Phys, Kepler Ctr Astro & Teilchenphys, Morgenstelle 14, D-72076 Tubingen, Germany.;Univ Edinburgh, Sch Phys & Astron, Edinburgh EH9 3FD, Midlothian, Scotland..
    Bergmann, F. S.
    Westfal Wilhelms Univ Munster, Inst Kernphys, Wilhelm Klemm Str 9, D-48149 Munster, Germany..
    Berlowski, M.
    Natl Ctr Nucl Res, Dept High Energy Phys, Ul Hoza 69, PL-00681 Warsaw, Poland..
    Bhatt, H.
    Indian Inst Technol, Dept Phys, Bombay 400076, Maharashtra, India..
    Bondar, A.
    Budker Inst Nucl Phys SB RAS, 11 Akad Lavrentieva Prospect, Novosibirsk 630090, Russia.;Novosibirsk State Univ, 2 Pirogova St, Novosibirsk 630090, Russia..
    Buescher, M.
    Forschungszentrum Julich, Inst Kernphys, D-52425 Julich, Germany.;Forschungszentrum Julich, Peter Grunberg Inst, Elekt Eigenschaften PGI 6, D-52425 Julich, Germany.;Heinrich Heine Univ Dusseldorf, Inst Laser & Plasmaphys, Univ Str 1, D-40225 Dusseldorf, Germany..
    Calén, Hans
    Uppsala University, Disciplinary Domain of Science and Technology, Physics, Department of Physics and Astronomy, Nuclear Physics.
    Ciepal, I.
    Jagiellonian Univ, Inst Phys, Ul Reymonta 4, PL-30059 Krakow, Poland..
    Clement, H.
    Eberhard Karls Univ Tubingen, Inst Phys, Morgenstelle 14, D-72076 Tubingen, Germany.;Univ Tubingen, Inst Phys, Kepler Ctr Astro & Teilchenphys, Morgenstelle 14, D-72076 Tubingen, Germany..
    Coderre, D.
    Forschungszentrum Julich, Inst Kernphys, D-52425 Julich, Germany.;Ruhr Univ Bochum, Inst Expt Phys 1, Univ Str 150, D-44780 Bochum, Germany.;Univ Bern, Albert Einstein Ctr Fundamental Phys, Sidlerstr 5, CH-3012 Bern, Switzerland..
    Czerwinski, E.
    Jagiellonian Univ, Inst Phys, Ul Reymonta 4, PL-30059 Krakow, Poland..
    Demmich, K.
    Westfal Wilhelms Univ Munster, Inst Kernphys, Wilhelm Klemm Str 9, D-48149 Munster, Germany..
    Engels, R.
    Forschungszentrum Julich, Inst Kernphys, D-52425 Julich, Germany..
    Erven, A.
    Forschungszentrum Julich, Zentralinst Engn Elektron & Anal, D-52425 Julich, Germany..
    Erven, W.
    Forschungszentrum Julich, Zentralinst Engn Elektron & Anal, D-52425 Julich, Germany..
    Eyrich, W.
    Friedrich Alexander Univ Erlangen Nurnberg, Inst Phys, Erwin Rommel Str 1, D-91058 Erlangen, Germany..
    Fedorets, P.
    Forschungszentrum Julich, Inst Kernphys, D-52425 Julich, Germany.;State Sci Ctr Russian Federat, Inst Theoret & Expt Phys, 25 Bolshaya Cheremushkinskaya, Moscow 117218, Russia..
    Foehl, K.
    Justus Liebig Univ Giessen, Inst Phys 2, Heinrich Buff Ring 16, D-35392 Giessen, Germany..
    Fransson, Kjell
    Uppsala University, Disciplinary Domain of Science and Technology, Physics, Department of Physics and Astronomy, Nuclear Physics.
    Goldenbaum, F.
    Forschungszentrum Julich, Inst Kernphys, D-52425 Julich, Germany..
    Goswami, A.
    Forschungszentrum Julich, Inst Kernphys, D-52425 Julich, Germany.;Indian Inst Technol Indore, Dept Phys, Khandwa Rd, Indore 452017, Madhya Pradesh, India..
    Grigoryev, K.
    Forschungszentrum Julich, Inst Kernphys, D-52425 Julich, Germany.;Petersburg Nucl Phys Inst, Div High Energy Phys, 2 Orlova Rosha, Gatchina 188300, Leningrad Distr, Russia.;Rhein Westfal TH Aachen, Phys Inst B 3, Phys Zentrum, D-52056 Aachen, Germany..
    Gullström, Carl-Oskar
    Uppsala University, Disciplinary Domain of Science and Technology, Physics, Department of Physics and Astronomy, Nuclear Physics.
    Heijkenskjöld, Lena
    Uppsala University, Disciplinary Domain of Science and Technology, Physics, Department of Physics and Astronomy, Nuclear Physics.
    Hejny, V.
    Forschungszentrum Julich, Inst Kernphys, D-52425 Julich, Germany..
    Huesken, N.
    Westfal Wilhelms Univ Munster, Inst Kernphys, Wilhelm Klemm Str 9, D-48149 Munster, Germany..
    Jarczyk, L.
    Jagiellonian Univ, Inst Phys, Ul Reymonta 4, PL-30059 Krakow, Poland..
    Johansson, Tord
    Uppsala University, Disciplinary Domain of Science and Technology, Physics, Department of Physics and Astronomy, Nuclear Physics.
    Kamys, B.
    Jagiellonian Univ, Inst Phys, Ul Reymonta 4, PL-30059 Krakow, Poland..
    Kemmerling, G.
    Forschungszentrum Julich, Zentralinst Engn Elektron & Anal, D-52425 Julich, Germany..
    Khan, F. A.
    Forschungszentrum Julich, Inst Kernphys, D-52425 Julich, Germany..
    Khatri, G.
    Jagiellonian Univ, Inst Phys, Ul Reymonta 4, PL-30059 Krakow, Poland..
    Khoukaz, A.
    Westfal Wilhelms Univ Munster, Inst Kernphys, Wilhelm Klemm Str 9, D-48149 Munster, Germany..
    Kirillov, D. A.
    Joint Inst Nucl Phys, Veksler & Baldin Lab High Energiy Phys, 6 Joliot Curie, Dubna 141980, Russia..
    Kistryn, S.
    Jagiellonian Univ, Inst Phys, Ul Reymonta 4, PL-30059 Krakow, Poland..
    Kleines, H.
    Forschungszentrum Julich, Zentralinst Engn Elektron & Anal, D-52425 Julich, Germany..
    Klos, B.
    Univ Silesia, August Chelkowski Inst Phys, Uniwersytecka 4, PL-40007 Katowice, Poland..
    Krzemien, W.
    Jagiellonian Univ, Inst Phys, Ul Reymonta 4, PL-30059 Krakow, Poland..
    Kulessa, P.
    Polish Acad Sci, Henryk Niewodniczanski Inst Nucl Phys, 152 Radzikowskiego St, PL-31342 Krakow, Poland..
    Kupsc, Andrzej
    Uppsala University, Disciplinary Domain of Science and Technology, Physics, Department of Physics and Astronomy, Nuclear Physics. Natl Ctr Nucl Res, Dept High Energy Phys, Ul Hoza 69, PL-00681 Warsaw, Poland..
    Kuzmin, A.
    Budker Inst Nucl Phys SB RAS, 11 Akad Lavrentieva Prospect, Novosibirsk 630090, Russia.;Novosibirsk State Univ, 2 Pirogova St, Novosibirsk 630090, Russia..
    Lalwani, K.
    Indian Inst Technol, Dept Phys, Bombay 400076, Maharashtra, India.;Univ Delhi, Dept Phys & Astrophys, Delhi 110007, India..
    Lersch, D.
    Forschungszentrum Julich, Inst Kernphys, D-52425 Julich, Germany..
    Lorentz, B.
    Forschungszentrum Julich, Inst Kernphys, D-52425 Julich, Germany..
    Magiera, A.
    Jagiellonian Univ, Inst Phys, Ul Reymonta 4, PL-30059 Krakow, Poland..
    Maier, R.
    Forschungszentrum Julich, Inst Kernphys, D-52425 Julich, Germany.;Forschungszentrum Julich, Julich Aachen Res Alliance, JARA FAME, D-52425 Julich, Germany.;Rhein Westfal TH Aachen, D-52056 Aachen, Germany..
    Marcinievski, Pawel
    Uppsala University, Disciplinary Domain of Science and Technology, Physics, Department of Physics and Astronomy, Nuclear Physics.
    Marianski, B.
    Natl Ctr Nucl Res, Dept Nucl Phys, Ul Hoza 69, PL-00681 Warsaw, Poland..
    Mikirtychiants, M.
    Forschungszentrum Julich, Inst Kernphys, D-52425 Julich, Germany.;Ruhr Univ Bochum, Inst Expt Phys 1, Univ Str 150, D-44780 Bochum, Germany.;Petersburg Nucl Phys Inst, Div High Energy Phys, 2 Orlova Rosha, Gatchina 188300, Leningrad Distr, Russia..
    Morsch, H. -P
    Moskal, P.
    Jagiellonian Univ, Inst Phys, Ul Reymonta 4, PL-30059 Krakow, Poland..
    Ohm, H.
    Forschungszentrum Julich, Inst Kernphys, D-52425 Julich, Germany..
    Ozerianska, I.
    Jagiellonian Univ, Inst Phys, Ul Reymonta 4, PL-30059 Krakow, Poland..
    del Rio, E. Perez
    Eberhard Karls Univ Tubingen, Inst Phys, Morgenstelle 14, D-72076 Tubingen, Germany.;Univ Tubingen, Inst Phys, Kepler Ctr Astro & Teilchenphys, Morgenstelle 14, D-72076 Tubingen, Germany.;Ist Nazl Fis Nucl, Lab Nazl Frascati, Via E Fermi 40, I-00044 Rome, Italy..
    Piskunov, N. M.
    Joint Inst Nucl Phys, Veksler & Baldin Lab High Energiy Phys, 6 Joliot Curie, Dubna 141980, Russia..
    Prasuhn, D.
    Forschungszentrum Julich, Inst Kernphys, D-52425 Julich, Germany..
    Pszczel, Damian
    Uppsala University, Disciplinary Domain of Science and Technology, Physics, Department of Physics and Astronomy, Nuclear Physics. Natl Ctr Nucl Res, Dept High Energy Phys, Ul Hoza 69, PL-00681 Warsaw, Poland..
    Pysz, K.
    Polish Acad Sci, Henryk Niewodniczanski Inst Nucl Phys, 152 Radzikowskiego St, PL-31342 Krakow, Poland..
    Pyszniak, Andrzej
    Uppsala University, Disciplinary Domain of Science and Technology, Physics, Department of Physics and Astronomy, Nuclear Physics. Jagiellonian Univ, Inst Phys, Ul Reymonta 4, PL-30059 Krakow, Poland..
    Ritman, J.
    Forschungszentrum Julich, Inst Kernphys, D-52425 Julich, Germany.;Ruhr Univ Bochum, Inst Expt Phys 1, Univ Str 150, D-44780 Bochum, Germany.;Forschungszentrum Julich, Julich Aachen Res Alliance, JARA FAME, D-52425 Julich, Germany.;Rhein Westfal TH Aachen, D-52056 Aachen, Germany..
    Roy, A.
    Indian Inst Technol Indore, Dept Phys, Khandwa Rd, Indore 452017, Madhya Pradesh, India..
    Rudy, Z.
    Jagiellonian Univ, Inst Phys, Ul Reymonta 4, PL-30059 Krakow, Poland..
    Rundel, O.
    Jagiellonian Univ, Inst Phys, Ul Reymonta 4, PL-30059 Krakow, Poland..
    Sawant, S.
    Indian Inst Technol, Dept Phys, Bombay 400076, Maharashtra, India.;Forschungszentrum Julich, Inst Kernphys, D-52425 Julich, Germany..
    Schadmand, S.
    Forschungszentrum Julich, Inst Kernphys, D-52425 Julich, Germany..
    Sefzick, T.
    Forschungszentrum Julich, Inst Kernphys, D-52425 Julich, Germany..
    Serdyuk, V.
    Forschungszentrum Julich, Inst Kernphys, D-52425 Julich, Germany..
    Shwartz, B.
    Budker Inst Nucl Phys SB RAS, 11 Akad Lavrentieva Prospect, Novosibirsk 630090, Russia.;Novosibirsk State Univ, 2 Pirogova St, Novosibirsk 630090, Russia..
    Sitterberg, K.
    Westfal Wilhelms Univ Munster, Inst Kernphys, Wilhelm Klemm Str 9, D-48149 Munster, Germany..
    Siudak, R.
    Polish Acad Sci, Henryk Niewodniczanski Inst Nucl Phys, 152 Radzikowskiego St, PL-31342 Krakow, Poland..
    Skorodko, T.
    Eberhard Karls Univ Tubingen, Inst Phys, Morgenstelle 14, D-72076 Tubingen, Germany.;Univ Tubingen, Inst Phys, Kepler Ctr Astro & Teilchenphys, Morgenstelle 14, D-72076 Tubingen, Germany.;Tomsk State Univ, Dept Phys, 36 Lenina Ave, Tomsk 634050, Russia..
    Skurzok, M.
    Jagiellonian Univ, Inst Phys, Ul Reymonta 4, PL-30059 Krakow, Poland..
    Smyrski, J.
    Jagiellonian Univ, Inst Phys, Ul Reymonta 4, PL-30059 Krakow, Poland..
    Sopov, V.
    State Sci Ctr Russian Federat, Inst Theoret & Expt Phys, 25 Bolshaya Cheremushkinskaya, Moscow 117218, Russia..
    Stassen, R.
    Forschungszentrum Julich, Inst Kernphys, D-52425 Julich, Germany..
    Stepaniak, J.
    Natl Ctr Nucl Res, Dept High Energy Phys, Ul Hoza 69, PL-00681 Warsaw, Poland..
    Stephan, E.
    Univ Silesia, August Chelkowski Inst Phys, Uniwersytecka 4, PL-40007 Katowice, Poland..
    Sterzenbach, G.
    Forschungszentrum Julich, Inst Kernphys, D-52425 Julich, Germany..
    Stockhorst, H.
    Forschungszentrum Julich, Inst Kernphys, D-52425 Julich, Germany..
    Stroeher, H.
    Forschungszentrum Julich, Inst Kernphys, D-52425 Julich, Germany.;Forschungszentrum Julich, Julich Aachen Res Alliance, JARA FAME, D-52425 Julich, Germany.;Rhein Westfal TH Aachen, D-52056 Aachen, Germany..
    Szczurek, A.
    Polish Acad Sci, Henryk Niewodniczanski Inst Nucl Phys, 152 Radzikowskiego St, PL-31342 Krakow, Poland..
    Taeschner, A.
    Westfal Wilhelms Univ Munster, Inst Kernphys, Wilhelm Klemm Str 9, D-48149 Munster, Germany..
    Trzcinski, A.
    Natl Ctr Nucl Res, Dept Nucl Phys, Ul Hoza 69, PL-00681 Warsaw, Poland..
    Varma, R.
    Indian Inst Technol, Dept Phys, Bombay 400076, Maharashtra, India..
    Wiedner, U.
    Ruhr Univ Bochum, Inst Expt Phys 1, Univ Str 150, D-44780 Bochum, Germany..
    Wolke, Magnus
    Uppsala University, Disciplinary Domain of Science and Technology, Physics, Department of Physics and Astronomy, Nuclear Physics.
    Wronska, A.
    Jagiellonian Univ, Inst Phys, Ul Reymonta 4, PL-30059 Krakow, Poland..
    Wuestner, P.
    Forschungszentrum Julich, Zentralinst Engn Elektron & Anal, D-52425 Julich, Germany..
    Wurm, P.
    Forschungszentrum Julich, Inst Kernphys, D-52425 Julich, Germany..
    Yamamoto, A.
    High Energy Accelerator Res Org KEK, Tsukuba, Ibaraki 3050801, Japan..
    Zabierowski, J.
    Natl Ctr Nucl Res, Dept Astrophys, Ul Box 447, PL-90950 Lodz, Poland..
    Zielinski, M. J.
    Jagiellonian Univ, Inst Phys, Ul Reymonta 4, PL-30059 Krakow, Poland..
    Zink, A.
    Friedrich Alexander Univ Erlangen Nurnberg, Inst Phys, Erwin Rommel Str 1, D-91058 Erlangen, Germany..
    Zlomanczuk, Jozef
    Uppsala University, Disciplinary Domain of Science and Technology, Physics, Department of Physics and Astronomy, Nuclear Physics.
    Zupranski, P.
    Natl Ctr Nucl Res, Dept Nucl Phys, Ul Hoza 69, PL-00681 Warsaw, Poland..
    Zurek, M.
    Forschungszentrum Julich, Inst Kernphys, D-52425 Julich, Germany..
    Measurements of branching ratios for eta decays into charged particles2016In: PHYSICAL REVIEW C, ISSN 2469-9985, Vol. 94, no 6, article id 065206Article in journal (Refereed)
    Abstract [en]

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

  • 32.
    Adlarson, Patrik
    et al.
    Uppsala University, Disciplinary Domain of Science and Technology, Physics, Department of Physics and Astronomy, Nuclear Physics. Eberhard Karls Univ Tubingen, Phys Inst, Morgenstelle 14, D-72076 Tubingen, Germany.;Johannes Gutenberg Univ Mainz, Inst Kemphys, Johann Joachim Becher Weg 45, D-55128 Mainz, Germany..
    Augustyniak, W.
    Natl Ctr Nucl Res, Dept Nucl Phys, ul Hoza 69, PL-00681 Warsaw, Poland..
    Bardan, W.
    Jagiellonian Univ, Inst Phys, Prof Stanislawa Lojasiewicza 11, PL-30348 Krakow, Poland..
    Bashkanov, M.
    Univ Edinburgh, Sch Phys & Astron, James Clerk Maxwell Bldg,Peter Guthrie Tait Rd, Edinburgh EH9 3FD, Midlothian, Scotland..
    Bergmann, F. S.
    WilhelmsUniv Miinster, Inst Kernphys, Wilhelm Klemm Str 9, D-48149 Munster, Germany..
    Berlowski, M.
    Natl Ctr Nucl Res, Dept High Energy Phys, ul Hoza 69, PL-00681 Warsaw, Poland..
    Bhatt, H.
    Indian Inst Technol, Dept Phys, Mumbai 400076, Maharashtra, India..
    Bondar, A.
    Budker Inst Nucl Phys SB RAS, 11 akademika Lavrentieva prospect, Novosibirsk 630090, Russia.;Eberhard Karls Univ Tubingen, Phys Inst, Morgenstelle 14, D-72076 Tubingen, Germany.;Johannes Gutenberg Univ Mainz, Inst Kemphys, Johann Joachim Becher Weg 45, D-55128 Mainz, Germany..
    Buescher, M.
    Forschungszentrum Julich, Peter Grunberg Inst, PGI 6 Elekt Eigenschaften, D-52425 Julich, Germany.;Heinrich Heine Univ Dusseldorf, Inst Laser & Plasmaphys, Univ 1, D-40225 Dusseldorf, Germany..
    Calén, Hans
    Uppsala University, Disciplinary Domain of Science and Technology, Physics, Department of Physics and Astronomy, Nuclear Physics.
    Ciepal, I.
    Polish Acad Sci, Henryk Niewodniczariski Inst Nucl Phys, 52 Radzikowskiego St, PL-31342 Krakow, Poland..
    Clement, H.
    Eberhard Karls Univ Tubingen, Phys Inst, Morgenstelle 14, D-72076 Tubingen, Germany.;Phys Inst Univ Tubingen, Kepler Ctr Astro & Teilchenphys, Morgenstelle 14, D-72076 Tubingen, Germany..
    Czerwinski, E.
    Jagiellonian Univ, Inst Phys, Prof Stanislawa Lojasiewicza 11, PL-30348 Krakow, Poland..
    Demmich, K.
    WilhelmsUniv Miinster, Inst Kernphys, Wilhelm Klemm Str 9, D-48149 Munster, Germany..
    Engels, R.
    Forschungszentrum Julich, Inst Kernphys, D-52425 Ankh, Germany..
    Erven, A.
    Forschungszentrum Julich, Zentralinst Engn Elekt & Analyt, D-52425 Julich, Germany..
    Erven, W.
    Forschungszentrum Julich, Zentralinst Engn Elekt & Analyt, D-52425 Julich, Germany..
    Eyrich, W.
    Friedrich Alexander Univ Erlangen Nurnberg, Phys Inst, Erwin Rommel Str 1, D-91058 Erlangen, Germany..
    Fedorets, P.
    Forschungszentrum Julich, Inst Kernphys, D-52425 Ankh, Germany.;Russian Federat, Inst Theoret & Expt Phys, State Sci Ctr, 25 Bolshaya Cheremushkinskaya, Moscow 117218, Russia..
    Foehl, K.
    Justus Liebig Univ Giessen, Physikal Inst 2, Heinrich Buff Ring 16, D-35392 Giessen, Germany..
    Fransson, Kjell
    Uppsala University, Disciplinary Domain of Science and Technology, Physics, Department of Physics and Astronomy, Nuclear Physics.
    Goldenbaum, E.
    Forschungszentrum Julich, Inst Kernphys, D-52425 Ankh, Germany..
    Goswami, A.
    Forschungszentrum Julich, Inst Kernphys, D-52425 Ankh, Germany.;Indian Inst Technol Indore, Dept Phys, Khandwa Rd, Indore 452017, Madhya Pradesh, India..
    Grigoryev, K.
    Forschungszentrum Julich, Inst Kernphys, D-52425 Ankh, Germany.;Petersburg Nucl Phys Inst, Div High Energy Phys, 2 Orlova Rosha, Gatchina 188300, Russia.;Rhein Westfal TH Aachen, Physikal Inst B Physikzentrum 3, D-52056 Aachen, Germany..
    Gullstroem, C. -O
    Heijkenskjöld, Lena
    Uppsala University, Disciplinary Domain of Science and Technology, Physics, Department of Physics and Astronomy, Nuclear Physics.
    Hejny, V.
    Forschungszentrum Julich, Inst Kernphys, D-52425 Ankh, Germany..
    Huesken, N.
    WilhelmsUniv Miinster, Inst Kernphys, Wilhelm Klemm Str 9, D-48149 Munster, Germany..
    Jarczyk, L.
    Jagiellonian Univ, Inst Phys, Prof Stanislawa Lojasiewicza 11, PL-30348 Krakow, Poland..
    Johansson, Tord
    Uppsala University, Disciplinary Domain of Science and Technology, Physics, Department of Physics and Astronomy, Nuclear Physics.
    Kamys, B.
    Jagiellonian Univ, Inst Phys, Prof Stanislawa Lojasiewicza 11, PL-30348 Krakow, Poland..
    Kelkar, N. G.
    Jagiellonian Univ, Inst Phys, Prof Stanislawa Lojasiewicza 11, PL-30348 Krakow, Poland.;Univ Los Andes, Dept Fis, Cra.IE,18A-10, Bogota, Colombia..
    Kemmerling, G.
    Forschungszentrum Julich, Zentralinst Engn Elekt & Analyt, D-52425 Julich, Germany.;Forschungszentrum Julich, JCNS, D-52425 Julich, Germany..
    Khatri, G.
    Jagiellonian Univ, Inst Phys, Prof Stanislawa Lojasiewicza 11, PL-30348 Krakow, Poland.;Harvard Univ, Dept Phys, 17 Oxford St, Cambridge, MA 02138 USA..
    Khoukaz, A.
    WilhelmsUniv Miinster, Inst Kernphys, Wilhelm Klemm Str 9, D-48149 Munster, Germany..
    Khreptak, O.
    Jagiellonian Univ, Inst Phys, Prof Stanislawa Lojasiewicza 11, PL-30348 Krakow, Poland..
    Kirillov, D. A.
    Kistryn, S.
    Jagiellonian Univ, Inst Phys, Prof Stanislawa Lojasiewicza 11, PL-30348 Krakow, Poland..
    Kleines, H.
    Eberhard Karls Univ Tubingen, Phys Inst, Morgenstelle 14, D-72076 Tubingen, Germany.;Forschungszentrum Julich, Zentralinst Engn Elekt & Analyt, D-52425 Julich, Germany..
    Klos, B.
    Univ Silesia, August Chelkowski Inst Phys, Uniwersytecka 4, PL-40007 Katowice, Poland..
    Krzemien, W.
    Natl Ctr Nucl Res, Dept High Energy Phys, ul Hoza 69, PL-00681 Warsaw, Poland..
    Kulessa, P.
    Polish Acad Sci, Henryk Niewodniczariski Inst Nucl Phys, 52 Radzikowskiego St, PL-31342 Krakow, Poland..
    Kupsc, Andrzej
    Uppsala University, Disciplinary Domain of Science and Technology, Physics, Department of Physics and Astronomy, Nuclear Physics. Natl Ctr Nucl Res, Dept High Energy Phys, ul Hoza 69, PL-00681 Warsaw, Poland..
    Kuzmin, A.
    Budker Inst Nucl Phys SB RAS, 11 akademika Lavrentieva prospect, Novosibirsk 630090, Russia.;Novosibirsk State Univ, 2 Pirogova Str, Novosibirsk 630090, Russia..
    Lalwani, K.
    Malaviya Natl Inst Technol, Dept Phys, Jaipur 302017, Rajasthan, India..
    Lersch, D.
    Forschungszentrum Julich, Inst Kernphys, D-52425 Ankh, Germany..
    Lorentz, B.
    Forschungszentrum Julich, Inst Kernphys, D-52425 Ankh, Germany..
    Magierae, A.
    Jagiellonian Univ, Inst Phys, Prof Stanislawa Lojasiewicza 11, PL-30348 Krakow, Poland..
    Maier, R.
    Forschungszentrum Julich, Inst Kernphys, D-52425 Ankh, Germany.;Forschungszentrum Julich, JARA FAME, D-52425 Julich, Germany.;Rhein Westfal TH Aachen, D-52056 Aachen, Germany..
    Marcinievski, Pawel
    Uppsala University, Disciplinary Domain of Science and Technology, Physics, Department of Physics and Astronomy, Nuclear Physics.
    Marianski, B.
    Natl Ctr Nucl Res, Dept Nucl Phys, ul Hoza 69, PL-00681 Warsaw, Poland..
    Morsch, H. -P
    Moskal, P.
    Jagiellonian Univ, Inst Phys, Prof Stanislawa Lojasiewicza 11, PL-30348 Krakow, Poland..
    Ohm, H.
    Forschungszentrum Julich, Inst Kernphys, D-52425 Ankh, Germany..
    del Rio, E. Perez
    Eberhard Karls Univ Tubingen, Phys Inst, Morgenstelle 14, D-72076 Tubingen, Germany.;Phys Inst Univ Tubingen, Kepler Ctr Astro & Teilchenphys, Morgenstelle 14, D-72076 Tubingen, Germany.;INFN, Lab Nazl Frascati, Via Fermi,40, I-00044 Rome, Italy..
    Piskunov, N. M.
    Joint Inst Nucl Phys, Veksler & Baldin Lab High Energy Phys, 6 Joliot Curie, Dubna 141980, Russia..
    Prasuhn, D.
    Forschungszentrum Julich, Inst Kernphys, D-52425 Ankh, Germany..
    Pszczel, Damian
    Uppsala University, Disciplinary Domain of Science and Technology, Physics, Department of Physics and Astronomy, Nuclear Physics. Natl Ctr Nucl Res, Dept High Energy Phys, ul Hoza 69, PL-00681 Warsaw, Poland..
    Pysz, K.
    Polish Acad Sci, Henryk Niewodniczariski Inst Nucl Phys, 52 Radzikowskiego St, PL-31342 Krakow, Poland..
    Pyszniak, Andrzej
    Uppsala University, Disciplinary Domain of Science and Technology, Physics, Department of Physics and Astronomy, Nuclear Physics. Jagiellonian Univ, Inst Phys, Prof Stanislawa Lojasiewicza 11, PL-30348 Krakow, Poland..
    Ritman, J.
    Forschungszentrum Julich, Inst Kernphys, D-52425 Ankh, Germany.;Forschungszentrum Julich, JARA FAME, D-52425 Julich, Germany.;Rhein Westfal TH Aachen, D-52056 Aachen, Germany.;Ruhr Univ Bochum, Inst Experimentalphys 1, Univ 150, D-44780 Bochum, Germany..
    Roy, A.
    Indian Inst Technol Indore, Dept Phys, Khandwa Rd, Indore 452017, Madhya Pradesh, India..
    Rudy, Z.
    Jagiellonian Univ, Inst Phys, Prof Stanislawa Lojasiewicza 11, PL-30348 Krakow, Poland..
    Rundel, O.
    Jagiellonian Univ, Inst Phys, Prof Stanislawa Lojasiewicza 11, PL-30348 Krakow, Poland..
    Sawant, S.
    Indian Inst Technol, Dept Phys, Mumbai 400076, Maharashtra, India..
    Schadmand, S.
    Forschungszentrum Julich, Inst Kernphys, D-52425 Ankh, Germany..
    Schaetti-Ozerianska, I.
    Jagiellonian Univ, Inst Phys, Prof Stanislawa Lojasiewicza 11, PL-30348 Krakow, Poland..
    Sefzick, T.
    Forschungszentrum Julich, Inst Kernphys, D-52425 Ankh, Germany..
    Serdyuk, V.
    Forschungszentrum Julich, Inst Kernphys, D-52425 Ankh, Germany..
    Shwartz, B.
    Budker Inst Nucl Phys SB RAS, 11 akademika Lavrentieva prospect, Novosibirsk 630090, Russia.;Novosibirsk State Univ, 2 Pirogova Str, Novosibirsk 630090, Russia..
    Sitterberg, K.
    WilhelmsUniv Miinster, Inst Kernphys, Wilhelm Klemm Str 9, D-48149 Munster, Germany..
    Skorodko, T.
    Phys Inst Univ Tubingen, Kepler Ctr Astro & Teilchenphys, Morgenstelle 14, D-72076 Tubingen, Germany.;Tomsk State Univ, Dept Phys, 36 Lenina Ave, Tomsk 634050, Russia.;Johannes Gutenberg Univ Mainz, Inst Kemphys, Johann Joachim Becher Weg 45, D-55128 Mainz, Germany..
    Skurzok, M.
    Jagiellonian Univ, Inst Phys, Prof Stanislawa Lojasiewicza 11, PL-30348 Krakow, Poland..
    Smyrski, J.
    Jagiellonian Univ, Inst Phys, Prof Stanislawa Lojasiewicza 11, PL-30348 Krakow, Poland..
    Sopov, V.
    Russian Federat, Inst Theoret & Expt Phys, State Sci Ctr, 25 Bolshaya Cheremushkinskaya, Moscow 117218, Russia..
    Stassen, R.
    Forschungszentrum Julich, Inst Kernphys, D-52425 Ankh, Germany..
    Stepaniak, J.
    Natl Ctr Nucl Res, Dept High Energy Phys, ul Hoza 69, PL-00681 Warsaw, Poland..
    Stephan, E.
    Sterzenbach, G.
    Forschungszentrum Julich, Inst Kernphys, D-52425 Ankh, Germany..
    Stockhorst, H.
    Forschungszentrum Julich, Inst Kernphys, D-52425 Ankh, Germany..
    Stroeher, H.
    Forschungszentrum Julich, Inst Kernphys, D-52425 Ankh, Germany.;Forschungszentrum Julich, JARA FAME, D-52425 Julich, Germany.;Rhein Westfal TH Aachen, D-52056 Aachen, Germany..
    Szczurek, A.
    Trzcinski, A.
    Natl Ctr Nucl Res, Dept Nucl Phys, ul Hoza 69, PL-00681 Warsaw, Poland..
    Varma, R.
    Indian Inst Technol, Dept Phys, Mumbai 400076, Maharashtra, India..
    Wolke, M.
    Wronska, A.
    Jagiellonian Univ, Inst Phys, Prof Stanislawa Lojasiewicza 11, PL-30348 Krakow, Poland..
    Wuestner, P.
    Forschungszentrum Julich, Zentralinst Engn Elekt & Analyt, D-52425 Julich, Germany..
    Yamamoto, A.
    High Energy Accelerator Res Org KEK, Tsukuba, Ibaraki 3050801, Japan..
    Zabierowski, J.
    Natl Ctr Nucl Res, Dept Astrophys, Box 447, PL-90950 Lodi, Poland..
    Zielinski, M. J.
    Jagiellonian Univ, Inst Phys, Prof Stanislawa Lojasiewicza 11, PL-30348 Krakow, Poland..
    Zlomanczuk, Jozef
    Uppsala University, Disciplinary Domain of Science and Technology, Physics, Department of Physics and Astronomy, Nuclear Physics.
    Zupranski, P.
    Natl Ctr Nucl Res, Dept Nucl Phys, ul Hoza 69, PL-00681 Warsaw, Poland..
    Zurek, M.
    Forschungszentrum Julich, Inst Kernphys, D-52425 Ankh, Germany..
    Search for eta-mesic He-4 in the dd -> (3)Hen pi(0) and dd -> (3)Hep pi(-) reactions with the WASA-at-COSY facility2017In: Nuclear Physics A, ISSN 0375-9474, E-ISSN 1873-1554, Vol. 959, p. 102-115Article in journal (Refereed)
    Abstract [en]

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

  • 33.
    Adlarson, Patrik
    et al.
    Uppsala University, Disciplinary Domain of Science and Technology, Physics, Department of Physics and Astronomy, Nuclear Physics. Johannes Gutenberg Univ Mainz, Inst Kernphys, Johann Joachim Becher Weg 45, D-55128 Mainz, Germany..
    Augustyniak, W.
    Natl Ctr Nucl Res, Dept Nucl Phys, Ul Hoza 69, PL-00681 Warsaw, Poland..
    Bardan, W.
    Jagiellonian Univ, Inst Phys, Prof Stanislawa Lojasiewicza 11, PL-30348 Krakow, Poland..
    Bashkanov, M.
    Univ Edinburgh, Sch Phys & Astron, James Clerk Maxwell Bldg,Peter Guthrie Tait Rd, Edinburgh EH9 3FD, Midlothian, Scotland..
    Bergmann, F. S.
    Westfal Wilhelms Univ Munster, Inst Kernphys, Wilhelm Klemm Str 9, D-48149 Munster, Germany..
    Berlowski, M.
    Natl Ctr Nucl Res, High Energy Phys Dept, Ul Hoza 69, PL-00681 Warsaw, Poland..
    Bhatt, H.
    Indian Inst Technol, Dept Phys, Bombay 400076, Maharashtra, India..
    Bondar, A.
    SB RAS, Budker Inst Nucl Phys, 11 Akad Lavrentieva Prospect, Novosibirsk 630090, Russia.;Novosibirsk State Univ, 2 Pirogova Str, Novosibirsk 630090, Russia..
    Buescher, M.
    Forschungszentrum Julich, Inst Kernphys, D-52425 Julich, Germany.;Forschungszentrum Julich, Peter Grunberg Inst, PGI Elekt Eigenschaften 6, D-52425 Julich, Germany.;Heinrich Heine Univ Dusseldorf, Inst Laser & Plasmaphys, Univ Str 1, D-40225 Dusseldorf, Germany..
    Calén, Hans
    Uppsala University, Disciplinary Domain of Science and Technology, Physics, Department of Physics and Astronomy, Nuclear Physics.
    Ciepal, I.
    Polish Acad Sci, Henryk Niewodniczanski Inst Nucl Phys, 152 Radzikowskiego St, PL-31342 Krakow, Poland..
    Clement, H.
    Eberhard Karls Univ Tubingen, Phys Inst, Morgenstelle 14, D-72076 Tubingen, Germany.;Eberhard Karls Univ Tubingen, Kepler Ctr Astro & Particle Phys, Morgenstelle 14, D-72076 Tubingen, Germany..
    Czerwinski, E.
    Jagiellonian Univ, Inst Phys, Prof Stanislawa Lojasiewicza 11, PL-30348 Krakow, Poland..
    Demmich, K.
    Westfal Wilhelms Univ Munster, Inst Kernphys, Wilhelm Klemm Str 9, D-48149 Munster, Germany..
    Engels, R.
    Forschungszentrum Julich, Inst Kernphys, D-52425 Julich, Germany..
    Erven, A.
    Forschungszentrum Julich, Zent Inst Engn Elekt & Analyt, D-52425 Julich, Germany..
    Erven, W.
    Forschungszentrum Julich, Zent Inst Engn Elekt & Analyt, D-52425 Julich, Germany..
    Eyrich, W.
    Friedrich Alexander Univ Erlangen Nurnberg, Phys Inst, Erwin Rommel Str 1, D-91058 Erlangen, Germany..
    Fedorets, P.
    Forschungszentrum Julich, Inst Kernphys, D-52425 Julich, Germany.;State Sci Ctr Russian Federat, Inst Theoret & Expt Phys, Bolshaya Cheremushkinskaya 25, Moscow 117218, Russia..
    Foehl, K.
    Justus Liebig Univ Giessen, Phys Inst 2, Heinrich Buff Ring 16, D-35392 Giessen, Germany..
    Fransson, Kjell
    Uppsala University, Disciplinary Domain of Science and Technology, Physics, Department of Physics and Astronomy, Nuclear Physics.
    Goldenbaum, F.
    Forschungszentrum Julich, Inst Kernphys, D-52425 Julich, Germany..
    Goswami, A.
    Forschungszentrum Julich, Inst Kernphys, D-52425 Julich, Germany.;Indian Inst Technol Indore, Dept Phys, Khandwa Rd, Indore 452017, Madhya Pradesh, India..
    Grigoryev, K.
    Forschungszentrum Julich, Inst Kernphys, D-52425 Julich, Germany.;Petersburg Nucl Phys Inst, High Energy Phys Div, Orlova Rosha 2, Gatchina 188300, Leningrad Distr, Russia.;Rhein Westfal TH Aachen, Phys Inst B 3, Phys Zentrum, D-52056 Aachen, Germany..
    Gullström, Carl-Oscar
    Uppsala University, Disciplinary Domain of Science and Technology, Physics, Department of Physics and Astronomy, Nuclear Physics.
    Heijkenskjöld, Lena
    Uppsala University, Disciplinary Domain of Science and Technology, Physics, Department of Physics and Astronomy, Nuclear Physics.
    Hejny, V.
    Forschungszentrum Julich, Inst Kernphys, D-52425 Julich, Germany..
    Huesken, N.
    Westfal Wilhelms Univ Munster, Inst Kernphys, Wilhelm Klemm Str 9, D-48149 Munster, Germany..
    Jarczyk, L.
    Jagiellonian Univ, Inst Phys, Prof Stanislawa Lojasiewicza 11, PL-30348 Krakow, Poland..
    Johansson, Tord
    Uppsala University, Disciplinary Domain of Science and Technology, Physics, Department of Physics and Astronomy, Nuclear Physics.
    Kamys, B.
    Jagiellonian Univ, Inst Phys, Prof Stanislawa Lojasiewicza 11, PL-30348 Krakow, Poland..
    Kemmerling, G.
    Forschungszentrum Julich, Zent Inst Engn Elekt & Analyt, D-52425 Julich, Germany.;Forschungszentrum Julich, Julich Ctr Neutron Sci JCNS, D-52425 Julich, Germany..
    Khan, F. A.
    Forschungszentrum Julich, Inst Kernphys, D-52425 Julich, Germany..
    Khatri, G.
    Jagiellonian Univ, Inst Phys, Prof Stanislawa Lojasiewicza 11, PL-30348 Krakow, Poland.;Harvard Univ, Dept Phys, 17 Oxford St, Cambridge, MA 02138 USA..
    Khoukaz, A.
    Westfal Wilhelms Univ Munster, Inst Kernphys, Wilhelm Klemm Str 9, D-48149 Munster, Germany..
    Khreptak, O.
    Jagiellonian Univ, Inst Phys, Prof Stanislawa Lojasiewicza 11, PL-30348 Krakow, Poland..
    Kirillov, D. A.
    Joint Inst Nucl Phys, Veksler & Baldin Lab High Energiy Phys, Joliot Curie 6, Dubna 141980, Moscow Region, Russia..
    Kistryn, S.
    Jagiellonian Univ, Inst Phys, Prof Stanislawa Lojasiewicza 11, PL-30348 Krakow, Poland..
    Kleines, H.
    Forschungszentrum Julich, Zent Inst Engn Elekt & Analyt, D-52425 Julich, Germany.;Forschungszentrum Julich, Julich Ctr Neutron Sci JCNS, D-52425 Julich, Germany..
    Klos, B.
    Univ Silesia, August Chelkowski Inst Phys, Uniwersytecka 4, PL-40007 Katowice, Poland..
    Krzemien, W.
    Natl Ctr Nucl Res, High Energy Phys Dept, Ul Hoza 69, PL-00681 Warsaw, Poland..
    Kulessa, P.
    Polish Acad Sci, Henryk Niewodniczanski Inst Nucl Phys, 152 Radzikowskiego St, PL-31342 Krakow, Poland..
    Kupsc, Andrzej
    Uppsala University, Disciplinary Domain of Science and Technology, Physics, Department of Physics and Astronomy, Nuclear Physics. Natl Ctr Nucl Res, High Energy Phys Dept, Ul Hoza 69, PL-00681 Warsaw, Poland..
    Kuzmin, A.
    SB RAS, Budker Inst Nucl Phys, 11 Akad Lavrentieva Prospect, Novosibirsk 630090, Russia.;Novosibirsk State Univ, 2 Pirogova Str, Novosibirsk 630090, Russia..
    Lalwani, K.
    Malaviya Natl Inst Technol Jaipur, Dept Phys, Jaipur 302017, Rajasthan, India..
    Lersch, D.
    Forschungszentrum Julich, Inst Kernphys, D-52425 Julich, Germany..
    Lorentz, B.
    Forschungszentrum Julich, Inst Kernphys, D-52425 Julich, Germany..
    Magiera, A.
    Jagiellonian Univ, Inst Phys, Prof Stanislawa Lojasiewicza 11, PL-30348 Krakow, Poland..
    Maier, R.
    Forschungszentrum Julich, Inst Kernphys, D-52425 Julich, Germany.;Forschungszentrum Julich, Julich Aachen Res Alliance, JARA FAME, D-52425 Julich, Germany.;Rhein Westfal TH Aachen, D-52056 Aachen, Germany..
    Marcinievski, Pawel
    Uppsala University, Disciplinary Domain of Science and Technology, Physics, Department of Physics and Astronomy, Nuclear Physics.
    Marianski, B.
    Natl Ctr Nucl Res, Dept Nucl Phys, Ul Hoza 69, PL-00681 Warsaw, Poland..
    Morsch, H. -P
    Moskal, P.
    Jagiellonian Univ, Inst Phys, Prof Stanislawa Lojasiewicza 11, PL-30348 Krakow, Poland..
    Ohm, H.
    Forschungszentrum Julich, Inst Kernphys, D-52425 Julich, Germany..
    del Rio, E. Perez
    Eberhard Karls Univ Tubingen, Phys Inst, Morgenstelle 14, D-72076 Tubingen, Germany.;Eberhard Karls Univ Tubingen, Kepler Ctr Astro & Particle Phys, Morgenstelle 14, D-72076 Tubingen, Germany.;INFN, Lab Nazl Frascati, Via E Fermi 40, I-00044 Rome, Italy..
    Piskunov, N. M.
    Joint Inst Nucl Phys, Veksler & Baldin Lab High Energiy Phys, Joliot Curie 6, Dubna 141980, Moscow Region, Russia..
    Prasuhn, D.
    Forschungszentrum Julich, Inst Kernphys, D-52425 Julich, Germany..
    Pszczel, D.
    Uppsala Univ, Dept Phys & Astron, Div Nucl Phys, Box 516, S-75120 Uppsala, Sweden.;Natl Ctr Nucl Res, High Energy Phys Dept, Ul Hoza 69, PL-00681 Warsaw, Poland..
    Pysz, K.
    Polish Acad Sci, Henryk Niewodniczanski Inst Nucl Phys, 152 Radzikowskiego St, PL-31342 Krakow, Poland..
    Pyszniak, Andrzej
    Uppsala University, Disciplinary Domain of Science and Technology, Physics, Department of Physics and Astronomy, Nuclear Physics. Jagiellonian Univ, Inst Phys, Prof Stanislawa Lojasiewicza 11, PL-30348 Krakow, Poland..
    Ritman, J.
    Forschungszentrum Julich, Inst Kernphys, D-52425 Julich, Germany.;Forschungszentrum Julich, Julich Aachen Res Alliance, JARA FAME, D-52425 Julich, Germany.;Rhein Westfal TH Aachen, D-52056 Aachen, Germany.;Ruhr Univ Bochum, Inst Expt Phys 1, Univ Str 150, D-44780 Bochum, Germany..
    Roy, A.
    Indian Inst Technol Indore, Dept Phys, Khandwa Rd, Indore 452017, Madhya Pradesh, India..
    Rudy, Z.
    Jagiellonian Univ, Inst Phys, Prof Stanislawa Lojasiewicza 11, PL-30348 Krakow, Poland..
    Rundel, O.
    Jagiellonian Univ, Inst Phys, Prof Stanislawa Lojasiewicza 11, PL-30348 Krakow, Poland..
    Sawant, S.
    Indian Inst Technol, Dept Phys, Bombay 400076, Maharashtra, India.;Forschungszentrum Julich, Inst Kernphys, D-52425 Julich, Germany..
    Schadmand, S.
    Forschungszentrum Julich, Inst Kernphys, D-52425 Julich, Germany..
    Schatti-Ozerianska, I.
    Jagiellonian Univ, Inst Phys, Prof Stanislawa Lojasiewicza 11, PL-30348 Krakow, Poland..
    Sefzick, T.
    Forschungszentrum Julich, Inst Kernphys, D-52425 Julich, Germany..
    Serdyuk, V.
    Forschungszentrum Julich, Inst Kernphys, D-52425 Julich, Germany..
    Shwartz, B.
    SB RAS, Budker Inst Nucl Phys, 11 Akad Lavrentieva Prospect, Novosibirsk 630090, Russia.;Novosibirsk State Univ, 2 Pirogova Str, Novosibirsk 630090, Russia..
    Sitterberg, K.
    Westfal Wilhelms Univ Munster, Inst Kernphys, Wilhelm Klemm Str 9, D-48149 Munster, Germany..
    Skorodko, T.
    Eberhard Karls Univ Tubingen, Phys Inst, Morgenstelle 14, D-72076 Tubingen, Germany.;Eberhard Karls Univ Tubingen, Kepler Ctr Astro & Particle Phys, Morgenstelle 14, D-72076 Tubingen, Germany.;Tomsk State Univ, Dept Phys, 36 Lenina Ave, Tomsk 634050, Russia..
    Skurzok, M.
    Jagiellonian Univ, Inst Phys, Prof Stanislawa Lojasiewicza 11, PL-30348 Krakow, Poland..
    Smyrski, J.
    Jagiellonian Univ, Inst Phys, Prof Stanislawa Lojasiewicza 11, PL-30348 Krakow, Poland..
    Sopov, V.
    State Sci Ctr Russian Federat, Inst Theoret & Expt Phys, Bolshaya Cheremushkinskaya 25, Moscow 117218, Russia..
    Stassen, R.
    Forschungszentrum Julich, Inst Kernphys, D-52425 Julich, Germany..
    Stepaniak, J.
    Natl Ctr Nucl Res, High Energy Phys Dept, Ul Hoza 69, PL-00681 Warsaw, Poland..
    Stephan, E.
    Univ Silesia, August Chelkowski Inst Phys, Uniwersytecka 4, PL-40007 Katowice, Poland..
    Sterzenbach, G.
    Forschungszentrum Julich, Inst Kernphys, D-52425 Julich, Germany..
    Stockhorst, H.
    Forschungszentrum Julich, Inst Kernphys, D-52425 Julich, Germany..
    Stroeher, H.
    Forschungszentrum Julich, Inst Kernphys, D-52425 Julich, Germany.;Forschungszentrum Julich, Julich Aachen Res Alliance, JARA FAME, D-52425 Julich, Germany.;Rhein Westfal TH Aachen, D-52056 Aachen, Germany..
    Szczurek, A.
    Polish Acad Sci, Henryk Niewodniczanski Inst Nucl Phys, 152 Radzikowskiego St, PL-31342 Krakow, Poland..
    Trzcinski, A.
    Natl Ctr Nucl Res, Dept Nucl Phys, Ul Hoza 69, PL-00681 Warsaw, Poland..
    Varma, R.
    Indian Inst Technol, Dept Phys, Bombay 400076, Maharashtra, India..
    Wolke, Magnus
    Uppsala University, Disciplinary Domain of Science and Technology, Physics, Department of Physics and Astronomy, Nuclear Physics.
    Wronska, A.
    Jagiellonian Univ, Inst Phys, Prof Stanislawa Lojasiewicza 11, PL-30348 Krakow, Poland..
    Wuestner, P.
    Forschungszentrum Julich, Zent Inst Engn Elekt & Analyt, D-52425 Julich, Germany..
    Yamamoto, A.
    High Energy Accelerator Res Org KEK, Tsukuba, Ibaraki 3050801, Japan..
    Zabierowski, J.
    Natl Ctr Nucl Res, Dept Astrophys, Box 447, PL-90950 Lodz, Poland..
    Zielinski, M. J.
    Jagiellonian Univ, Inst Phys, Prof Stanislawa Lojasiewicza 11, PL-30348 Krakow, Poland..
    Zlomanczuk, Jozef
    Uppsala University, Disciplinary Domain of Science and Technology, Physics, Department of Physics and Astronomy, Nuclear Physics.
    Zupranski, P.
    Natl Ctr Nucl Res, Dept Nucl Phys, Ul Hoza 69, PL-00681 Warsaw, Poland..
    Zurek, M.
    Forschungszentrum Julich, Inst Kernphys, D-52425 Julich, Germany..
    Kubis, B.
    Rhein Friedrich Wilhelms Univ Bonn, Helmholtz Inst Strahlen & Kernphys, Nussallee 14-16, D-53115 Bonn, Germany..
    Leupold, Stefan
    Uppsala University, Disciplinary Domain of Science and Technology, Physics, Department of Physics and Astronomy, Nuclear Physics. Uppsala Univ, Dept Phys & Astron, Div Nucl Phys, Box 516, S-75120 Uppsala, Sweden..
    Measurement of the ω → π+ππ0 Dalitz plot distribution: The WASA-at-COSY Collaboration2017In: Physics Letters B, ISSN 0370-2693, E-ISSN 1873-2445, Vol. 770, p. 418-425Article in journal (Refereed)
    Abstract [en]

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

  • 34.
    Adlarson, Patrik
    et al.
    Uppsala University, Disciplinary Domain of Science and Technology, Physics, Department of Physics and Astronomy, Nuclear Physics. Johannes Gutenberg Univ Mainz, Inst Kernphys, Johann Joachim Becher Weg 45, D-55128 Mainz, Germany..
    Augustyniak, W.
    Natl Ctr Nucl Res, Dept Nucl Phys, Ul Hoza 69, PL-00681 Warsaw, Poland..
    Bardan, W.
    Jagiellonian Univ, Inst Phys, Ul Reymonta 4, PL-30059 Krakow, Poland..
    Bashkanov, M.
    Univ Edinburgh, Sch Phys & Astron, James Clerk Maxwell Bldg,Peter Guthrie Tait Rd, Edinburgh EH9 3FD, Midlothian, Scotland.;Univ Tubingen, Inst Phys, Morgenstelle 14, D-72076 Tubingen, Germany..
    Bergmann, F. S.
    Univ Munster, Inst Kernphys, Wilhelm Klemm Str 9, D-48149 Munster, Germany..
    Berlowski, M.
    Natl Ctr Nucl Res, Dept High Energy Phys, Ul Hoza 69, Warsaw, Poland..
    Bhatt, H.
    Indian Inst Technol, Dept Phys, Bombay 400076, Maharashtra, India..
    Bondar, A.
    RAS, SB, Budker Inst Nucl Phys, 11 Akad Lavrentieva Prospect, Novosibirsk 630090, Russia.;Novosibirsk State Univ, 2 Pirogova Str, Novosibirsk, Russia..
    Buscher, M.
    Forschungszentrum Julich, Inst Kernphys, D-52425 Julich, Germany.;Forschungszentrum Julich, Peter Grunberg Inst, PGI Elekt Eigensch 6, D-52425 Julich, Germany..
    Calén, Hans
    Uppsala University, Disciplinary Domain of Science and Technology, Physics, Department of Physics and Astronomy, Nuclear Physics. Uppsala University, The Svedberg Laboratory.
    Ciepa, I.
    Jagiellonian Univ, Inst Phys, Ul Reymonta 4, PL-30059 Krakow, Poland..
    Clement, H.
    Univ Tubingen, Inst Phys, Morgenstelle 14, D-72076 Tubingen, Germany.;Univ Tubingen, Kepler Ctr Astro & Particle Phys, Morgenstelle 14, D-72076 Tubingen, Germany..
    Czerwinski, E.
    Jagiellonian Univ, Inst Phys, Ul Reymonta 4, PL-30059 Krakow, Poland..
    Demmich, K.
    Univ Munster, Inst Kernphys, Wilhelm Klemm Str 9, D-48149 Munster, Germany..
    Engels, R.
    Novosibirsk State Univ, 2 Pirogova Str, Novosibirsk, Russia..
    Erven, A.
    Forschungszentrum Julich, Zentralinst Engn Elekt & Analyt, D-52425 Julich, Germany..
    Erven, W.
    Forschungszentrum Julich, Zentralinst Engn Elekt & Analyt, D-52425 Julich, Germany..
    Eyrich, W.
    Univ Erlangen Nurnberg, Inst Phys, Erwin Rommel Str 1, D-91058 Erlangen, Germany..
    Fedorets, P.
    Forschungszentrum Julich, Inst Kernphys, D-52425 Julich, Germany.;State Sci Ctr Russian Federat, Inst Theoret & Expt Phys, 25 Bolshaya Cheremushkinskaya, Moscow 117218, Russia..
    Foehl, K.
    Univ Giessen, Inst Phys 2, Heinrich Buff Ring 16, D-35392 Giessen, Germany..
    Fransson, Kjell
    Uppsala University, Disciplinary Domain of Science and Technology, Physics, Department of Physics and Astronomy, Nuclear Physics.
    Goldenbaum, F.
    Forschungszentrum Julich, Inst Kernphys, D-52425 Julich, Germany..
    Goswami, A.
    Indian Inst Technol, Dept Phys, Khandwa Rd, Indore 452017, Madhya Pradesh, India..
    Grigoryev, K.
    Forschungszentrum Julich, Inst Kernphys, D-52425 Julich, Germany.;Petersburg Nucl Phys Inst, Div High Energy Phys, 2 Orlova Rosha, St Petersburg 188300, Russia.;Rhein Westfal TH Aachen, Phys Zentrum, Phys Inst B 1, D-52056 Aachen, Germany..
    Gullström, Carl-Oscar
    Uppsala University, Disciplinary Domain of Science and Technology, Physics, Department of Physics and Astronomy, Nuclear Physics.
    Heijkenskjöld, Lena
    Uppsala University, Disciplinary Domain of Science and Technology, Physics, Department of Physics and Astronomy, Nuclear Physics.
    Hejny, V.
    Forschungszentrum Julich, Inst Kernphys, D-52425 Julich, Germany..
    Huesken, N.
    Univ Munster, Inst Kernphys, Wilhelm Klemm Str 9, D-48149 Munster, Germany..
    Jarczyk, L.
    Jagiellonian Univ, Inst Phys, Ul Reymonta 4, PL-30059 Krakow, Poland..
    Johansson, Tord
    Uppsala University, Disciplinary Domain of Science and Technology, Physics, Department of Physics and Astronomy, Nuclear Physics.
    Kamys, B.
    Jagiellonian Univ, Inst Phys, Ul Reymonta 4, PL-30059 Krakow, Poland..
    Kemmerling, G.
    Forschungszentrum Julich, Zentralinst Engn Elekt & Analyt, D-52425 Julich, Germany..
    Khan, F. A.
    Forschungszentrum Julich, Inst Kernphys, D-52425 Julich, Germany..
    Khatri, G.
    Jagiellonian Univ, Inst Phys, Ul Reymonta 4, PL-30059 Krakow, Poland..
    Khoukaz, A.
    Univ Munster, Inst Kernphys, Wilhelm Klemm Str 9, D-48149 Munster, Germany..
    Kirillov, D. A.
    Joint Inst Nucl Phys, Veksler & Baldin Lab High Energiy Phys, 6 Joliot Curie, Dubna 141980, Moscow Region, Russia..
    Kistryn, S.
    Jagiellonian Univ, Inst Phys, Ul Reymonta 4, PL-30059 Krakow, Poland..
    Kleines, H.
    Forschungszentrum Julich, Zentralinst Engn Elekt & Analyt, D-52425 Julich, Germany..
    Klos, B.
    Univ Silesia, August Chelkowski Inst Phys, Uniwersytecka 4, PL-40007 Katowice, Poland..
    Krzemien, W.
    Jagiellonian Univ, Inst Phys, Ul Reymonta 4, PL-30059 Krakow, Poland..
    Kulessa, P.
    Polish Acad Sci, Henryk Niewodniczanski Inst Nucl Phys, 152 Radzikowskiego St, PL-31342 Krakow, Poland..
    Kupsc, Andrzej
    Uppsala University, Disciplinary Domain of Science and Technology, Physics, Department of Physics and Astronomy, Nuclear Physics. Natl Ctr Nucl Res, Dept High Energy Phys, Ul Hoza 69, Warsaw, Poland..
    Kuzmin, A.
    RAS, SB, Budker Inst Nucl Phys, 11 Akad Lavrentieva Prospect, Novosibirsk 630090, Russia.;Novosibirsk State Univ, 2 Pirogova Str, Novosibirsk, Russia..
    Lalwani, K.
    Malaviya Natl Inst Technol Jaipur, Dept Phys, JLN Marg, Jaipur 302017, Rajasthan, India..
    Lersch, D.
    Forschungszentrum Julich, Inst Kernphys, D-52425 Julich, Germany..
    Lorentz, B.
    Forschungszentrum Julich, Inst Kernphys, D-52425 Julich, Germany..
    Magiera, A.
    Jagiellonian Univ, Inst Phys, Ul Reymonta 4, PL-30059 Krakow, Poland..
    Maier, R.
    Forschungszentrum Julich, Inst Kernphys, D-52425 Julich, Germany.;Forschungszentrum Julich, Julich Aachen Res Alliance, JARA FAME, D-52425 Julich, Germany.;Rhein Westfal TH Aachen, D-52056 Aachen, Germany..
    Marciniewski, Pawel
    Uppsala University, Disciplinary Domain of Science and Technology, Physics, Department of Physics and Astronomy, Nuclear Physics.
    Marianski, B.
    Natl Ctr Nucl Res, Dept Nucl Phys, Ul Hoza 69, PL-00681 Warsaw, Poland..
    Morsch, H. -P
    Moskal, P.
    Jagiellonian Univ, Inst Phys, Ul Reymonta 4, PL-30059 Krakow, Poland..
    Ohm, H.
    Forschungszentrum Julich, Inst Kernphys, D-52425 Julich, Germany..
    del Rio, E. Perez
    Univ Tubingen, Inst Phys, Morgenstelle 14, D-72076 Tubingen, Germany.;Ist Nazl Fis Nucl, Nazl Frascati Lab, Via E Fermi 40, I-00044 Rome, Italy..
    Piskunov, N. M.
    Joint Inst Nucl Phys, Veksler & Baldin Lab High Energiy Phys, 6 Joliot Curie, Dubna 141980, Moscow Region, Russia..
    Prasuhn, D.
    Forschungszentrum Julich, Inst Kernphys, D-52425 Julich, Germany..
    Pszczel, Damian
    Uppsala University, Disciplinary Domain of Science and Technology, Physics, Department of Physics and Astronomy, Nuclear Physics. Natl Ctr Nucl Res, Dept High Energy Phys, Ul Hoza 69, Warsaw, Poland..
    Pysz, K.
    Polish Acad Sci, Henryk Niewodniczanski Inst Nucl Phys, 152 Radzikowskiego St, PL-31342 Krakow, Poland..
    Pyszniak, Andrzej
    Uppsala University, Disciplinary Domain of Science and Technology, Physics, Department of Physics and Astronomy, Nuclear Physics. Jagiellonian Univ, Inst Phys, Ul Reymonta 4, PL-30059 Krakow, Poland..
    Ritman, J.
    Forschungszentrum Julich, Inst Kernphys, D-52425 Julich, Germany.;Forschungszentrum Julich, Julich Aachen Res Alliance, JARA FAME, D-52425 Julich, Germany.;Rhein Westfal TH Aachen, D-52056 Aachen, Germany.;Ruhr Univ Bochum, Inst Expt Phys 1, Univ Str 150, D-44780 Bochum, Germany..
    Roy, A.
    Indian Inst Technol, Dept Phys, Khandwa Rd, Indore 452017, Madhya Pradesh, India..
    Rudy, Z.
    Jagiellonian Univ, Inst Phys, Ul Reymonta 4, PL-30059 Krakow, Poland..
    Rundel, O.
    Jagiellonian Univ, Inst Phys, Ul Reymonta 4, PL-30059 Krakow, Poland..
    Sawant, S.
    Indian Inst Technol, Dept Phys, Bombay 400076, Maharashtra, India.;Forschungszentrum Julich, Inst Kernphys, D-52425 Julich, Germany..
    Schadmand, S.
    Forschungszentrum Julich, Inst Kernphys, D-52425 Julich, Germany..
    Schaetti-Ozerianska, I.
    Jagiellonian Univ, Inst Phys, Ul Reymonta 4, PL-30059 Krakow, Poland..
    Sefzick, T.
    Forschungszentrum Julich, Inst Kernphys, D-52425 Julich, Germany..
    Serdyuk, V.
    Forschungszentrum Julich, Inst Kernphys, D-52425 Julich, Germany..
    Shwartz, B.
    RAS, SB, Budker Inst Nucl Phys, 11 Akad Lavrentieva Prospect, Novosibirsk 630090, Russia.;Novosibirsk State Univ, 2 Pirogova Str, Novosibirsk, Russia..
    Sitterberg, K.
    Univ Munster, Inst Kernphys, Wilhelm Klemm Str 9, D-48149 Munster, Germany..
    Siudak, R.
    Polish Acad Sci, Henryk Niewodniczanski Inst Nucl Phys, 152 Radzikowskiego St, PL-31342 Krakow, Poland..
    Skorodko, T.
    Univ Tubingen, Inst Phys, Morgenstelle 14, D-72076 Tubingen, Germany.;Univ Tubingen, Kepler Ctr Astro & Particle Phys, Morgenstelle 14, D-72076 Tubingen, Germany.;Tomsk State Univ, Dept Phys, 36 Lenina Ave, Tomsk 634050, Russia..
    Skurzok, M.
    Jagiellonian Univ, Inst Phys, Ul Reymonta 4, PL-30059 Krakow, Poland..
    Smyrski, J.
    Jagiellonian Univ, Inst Phys, Ul Reymonta 4, PL-30059 Krakow, Poland..
    Sopov, V.
    State Sci Ctr Russian Federat, Inst Theoret & Expt Phys, 25 Bolshaya Cheremushkinskaya, Moscow 117218, Russia..
    Stassen, R.
    Forschungszentrum Julich, Inst Kernphys, D-52425 Julich, Germany..
    Stepaniak, J.
    Natl Ctr Nucl Res, Dept High Energy Phys, Ul Hoza 69, Warsaw, Poland..
    Stephan, E.
    Univ Silesia, August Chelkowski Inst Phys, Uniwersytecka 4, PL-40007 Katowice, Poland..
    Sterzenbach, G.
    Forschungszentrum Julich, Inst Kernphys, D-52425 Julich, Germany..
    Stockhorst, H.
    Forschungszentrum Julich, Inst Kernphys, D-52425 Julich, Germany..
    Stroeher, H.
    Forschungszentrum Julich, Inst Kernphys, D-52425 Julich, Germany.;Forschungszentrum Julich, Julich Aachen Res Alliance, JARA FAME, D-52425 Julich, Germany.;Rhein Westfal TH Aachen, D-52056 Aachen, Germany..
    Szczurek, A.
    Polish Acad Sci, Henryk Niewodniczanski Inst Nucl Phys, 152 Radzikowskiego St, PL-31342 Krakow, Poland..
    Taeschner, A.
    Univ Munster, Inst Kernphys, Wilhelm Klemm Str 9, D-48149 Munster, Germany..
    Trzcinski, A.
    Natl Ctr Nucl Res, Dept Nucl Phys, Ul Hoza 69, PL-00681 Warsaw, Poland..
    Varma, R.
    Indian Inst Technol, Dept Phys, Bombay 400076, Maharashtra, India..
    Wolke, Magnus
    Uppsala University, Disciplinary Domain of Science and Technology, Physics, Department of Physics and Astronomy, Nuclear Physics.
    Wronska, A.
    Jagiellonian Univ, Inst Phys, Ul Reymonta 4, PL-30059 Krakow, Poland..
    Wuestner, P.
    Forschungszentrum Julich, Zentralinst Engn Elekt & Analyt, D-52425 Julich, Germany..
    Yamamoto, A.
    KEK, High Energy Accelerator Res Org, Tsukuba, Ibaraki 3050801, Japan..
    Zabierowski, J.
    Natl Ctr Nucl Res, Dept Astrophys, Box 447, PL-90950 Lodz, Poland..
    Zielinski, M. J.
    Jagiellonian Univ, Inst Phys, Ul Reymonta 4, PL-30059 Krakow, Poland..
    Zink, A.
    Univ Erlangen Nurnberg, Inst Phys, Erwin Rommel Str 1, D-91058 Erlangen, Germany..
    Zlomanczuk, Jozef
    Uppsala University, Disciplinary Domain of Science and Technology, Physics, Department of Physics and Astronomy, Nuclear Physics.
    Zupranski, P.
    Natl Ctr Nucl Res, Dept Nucl Phys, Ul Hoza 69, PL-00681 Warsaw, Poland..
    Zurek, M.
    Forschungszentrum Julich, Inst Kernphys, D-52425 Julich, Germany..
    Measurement of the (n)over-right-arrowp -> d pi(0) pi(0) reaction with polarized beam in the region of the d(*)(2380) resonance2016In: European Physical Journal A, ISSN 1434-6001, E-ISSN 1434-601X, Vol. 52, no 5, p. 1-7, article id 147Article in journal (Refereed)
    Abstract [en]

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

  • 35.
    Adlarson, Patrik
    et al.
    Uppsala University, Disciplinary Domain of Science and Technology, Physics, Department of Physics and Astronomy, Nuclear Physics. Johannes Gutenberg Univ Mainz, Inst Kernphys, Johann Joachim Becher Weg 45, D-55128 Mainz, Germany..
    Augustyniak, W.
    Natl Ctr Nucl Res, Dept Nucl Phys, Ul Hoza 69, PL-00681 Warsaw, Poland..
    Bardan, W.
    Bashkanov, M.
    Univ Edinburgh, Sch Phys & Astron, James Clerk Maxwell Bldg,Peter Guthrie Tait Rd, Edinburgh EH9 3FD, Midlothian, Scotland..
    Bergmann, F. S.
    Westfal Wilhelms Univ Munster, Inst Kernphys, Wilhelm Klemm Str 9, D-48149 Munster, Germany..
    Berlowski, M.
    Natl Ctr Nucl Res, High Energy Phys Dept, Ul Hoza 69, PL-00681 Warsaw, Poland..
    Bhatt, H.
    Indian Inst Technol, Dept Phys, Bombay 400076, Maharashtra, India..
    Bondar, A.
    Natl Ctr Nucl Res, Dept Nucl Phys, Ul Hoza 69, PL-00681 Warsaw, Poland.;SB RAS, Budker Inst Nucl Phys, 11 Akad Lavrentieva Prospect, Novosibirsk 630090, Russia.;Novosibirsk State Univ, 2 Pirogova Str, Novosibirsk 630090, Russia.;Forschungszentrum Julich, Zent Inst Engn Elekt & Analyt, D-52425 Julich, Germany..
    Buscher, M.
    Johannes Gutenberg Univ Mainz, Inst Kernphys, Johann Joachim Becher Weg 45, D-55128 Mainz, Germany.;Forschungszentrum Julich, Peter Grunberg Inst, PGI Elekt Eigenschaften 6, D-52425 Julich, Germany.;Heinrich Heine Univ Dusseldorf, Inst Laser & Plasmaphys, Univ Str 1, D-40225 Dusseldorf, Germany..
    Calén, Hans
    Uppsala University, Disciplinary Domain of Science and Technology, Physics, Department of Physics and Astronomy, Nuclear Physics.
    Ciepal, I.
    Jagiellonian Univ, Inst Phys, Ul Reymonta 4, PL-30059 Krakow, Poland..
    Clement, H.
    Eberhard Karls Univ Tubingen, Inst Phys, Morgenstelle 14, D-72076 Tubingen, Germany.;Eberhard Karls Univ Tubingen, Kepler Ctr Astro & Particle Phys, Morgenstelle 14, D-72076 Tubingen, Germany..
    Czerwinski, E.
    Jagiellonian Univ, Inst Phys, Ul Reymonta 4, PL-30059 Krakow, Poland..
    Demmich, K.
    Westfal Wilhelms Univ Munster, Inst Kernphys, Wilhelm Klemm Str 9, D-48149 Munster, Germany..
    Engels, R.
    Forschungszentrum Julich, Inst Kernphys, D-52425 Julich, Germany..
    Erven, A.
    Forschungszentrum Julich, Zent Inst Engn Elekt & Analyt, D-52425 Julich, Germany..
    Erven, W.
    Forschungszentrum Julich, Zent Inst Engn Elekt & Analyt, D-52425 Julich, Germany..
    Eyrich, W.
    Friedrich Alexander Univ Erlangen Nurnberg, Inst Phys, Erwin Rommel Str 1, D-91058 Erlangen, Germany..
    Fedorets, P.
    Forschungszentrum Julich, Inst Kernphys, D-52425 Julich, Germany.;State Sci Ctr Russian Federat, Inst Theoret & Expt Phys, Bolshaya Cheremushkinskaya 25, Moscow 117218, Russia..
    Fohl, K.
    Justus Liebig Univ Giessen, Inst Phys 2, Heinrich Buff Ring 16, D-35392 Giessen, Germany..
    Fransson, Kjell E. I.
    Uppsala University, Disciplinary Domain of Science and Technology, Physics, Department of Physics and Astronomy, Nuclear Physics.
    Goldenbaum, F.
    Forschungszentrum Julich, Inst Kernphys, D-52425 Julich, Germany..
    Goswami, A.
    Forschungszentrum Julich, Inst Kernphys, D-52425 Julich, Germany.;Indian Inst Technol Indore, Dept Phys, Khandwa Rd, Indore 452017, Madhya Pradesh, India..
    Grigoryev, K.
    Forschungszentrum Julich, Inst Kernphys, D-52425 Julich, Germany.;Petersburg Nucl Phys Inst, High Energy Phys Div, Orlova Rosha 2, Gatchina 188300, Leningrad Distr, Russia.;Rhein Westfal TH Aachen, Phys Zentrum, Phys Inst B 3, D-52056 Aachen, Germany..
    Gullstrom, C. -O
    Heijkenskjöld, Lena
    Uppsala University, Disciplinary Domain of Science and Technology, Physics, Department of Physics and Astronomy, Nuclear Physics.
    Hejny, V.
    Forschungszentrum Julich, Inst Kernphys, D-52425 Julich, Germany.;Johannes Gutenberg Univ Mainz, Inst Kernphys, Johann Joachim Becher Weg 45, D-55128 Mainz, Germany..
    Husken, N.
    Westfal Wilhelms Univ Munster, Inst Kernphys, Wilhelm Klemm Str 9, D-48149 Munster, Germany..
    Jarczyk, L.
    Jagiellonian Univ, Inst Phys, Ul Reymonta 4, PL-30059 Krakow, Poland..
    Johansson, Tord
    Uppsala University, Disciplinary Domain of Science and Technology, Physics, Department of Physics and Astronomy, Nuclear Physics.
    Kamys, B.
    Jagiellonian Univ, Inst Phys, Ul Reymonta 4, PL-30059 Krakow, Poland..
    Kemmerling, G.
    Forschungszentrum Julich, Zent Inst Engn Elekt & Analyt, D-52425 Julich, Germany.;Forschungszentrum Julich, JCNS, D-52425 Julich, Germany..
    Khan, F. A.
    Forschungszentrum Julich, Inst Kernphys, D-52425 Julich, Germany..
    Khatri, G.
    Jagiellonian Univ, Inst Phys, Ul Reymonta 4, PL-30059 Krakow, Poland..
    Khoukaz, A.
    Westfal Wilhelms Univ Munster, Inst Kernphys, Wilhelm Klemm Str 9, D-48149 Munster, Germany..
    Khreptak, O.
    Jagiellonian Univ, Inst Phys, Ul Reymonta 4, PL-30059 Krakow, Poland..
    Kirillov, D. A.
    Joint Inst Nucl Res, Veksler & Baldin Lab High Energiy Phys, Joliot Curie 6, Dubna 141980, Moscow Region, Russia..
    Kistryn, S.
    Jagiellonian Univ, Inst Phys, Ul Reymonta 4, PL-30059 Krakow, Poland..
    Kleines, H.
    Forschungszentrum Julich, Zent Inst Engn Elekt & Analyt, D-52425 Julich, Germany.;Forschungszentrum Julich, JCNS, D-52425 Julich, Germany..
    Klos, B.
    Univ Silesia, August Chelkowski Inst Phys, Uniwersytecka 4, PL-40007 Katowice, Poland..
    Krzemien, W.
    Jagiellonian Univ, Inst Phys, Ul Reymonta 4, PL-30059 Krakow, Poland..
    Kulessa, P.
    Polish Acad Sci, Henryk Niewodnicza nski Inst Nucl Phys, 152 Radzikowskiego St, PL-31342 Krakow, Poland..
    Kupsc, Andrzej
    Uppsala University, Disciplinary Domain of Science and Technology, Physics, Department of Physics and Astronomy, Nuclear Physics. Natl Ctr Nucl Res, High Energy Phys Dept, Ul Hoza 69, PL-00681 Warsaw, Poland..
    Kuzmin, A.
    SB RAS, Budker Inst Nucl Phys, 11 Akad Lavrentieva Prospect, Novosibirsk 630090, Russia.;Novosibirsk State Univ, 2 Pirogova Str, Novosibirsk 630090, Russia..
    Lalwani, K.
    Malaviya Natl Inst Technol, Dept Phys, Jaipur 302017, Rajasthan, India..
    Lersch, D.
    Forschungszentrum Julich, Inst Kernphys, D-52425 Julich, Germany..
    Lorentz, B.
    Forschungszentrum Julich, Inst Kernphys, D-52425 Julich, Germany..
    Magiera, A.
    Jagiellonian Univ, Inst Phys, Ul Reymonta 4, PL-30059 Krakow, Poland..
    Maier, R.
    Forschungszentrum Julich, Inst Kernphys, D-52425 Julich, Germany..
    Marcinievski, Pawel
    Uppsala University, Disciplinary Domain of Science and Technology, Physics, Department of Physics and Astronomy, Nuclear Physics.
    Marianski, B.
    Natl Ctr Nucl Res, Dept Nucl Phys, Ul Hoza 69, PL-00681 Warsaw, Poland..
    Morsch, H. -P
    Moskal, P.
    Jagiellonian Univ, Inst Phys, Ul Reymonta 4, PL-30059 Krakow, Poland..
    Ohm, H.
    Forschungszentrum Julich, Inst Kernphys, D-52425 Julich, Germany..
    del Rio, E. Perez
    Eberhard Karls Univ Tubingen, Inst Phys, Morgenstelle 14, D-72076 Tubingen, Germany.;Eberhard Karls Univ Tubingen, Kepler Ctr Astro & Particle Phys, Morgenstelle 14, D-72076 Tubingen, Germany.;Ist Nazl Fis Nucl, Lab Nazl Frascati, Via E Fermi 40, I-00044 Frascati, Italy..
    Piskunov, N. M.
    Joint Inst Nucl Res, Veksler & Baldin Lab High Energiy Phys, Joliot Curie 6, Dubna 141980, Moscow Region, Russia..
    Prasuhnl, D.
    Forschungszentrum Julich, Inst Kernphys, D-52425 Julich, Germany..
    Pszczel, Damian
    Uppsala University, Disciplinary Domain of Science and Technology, Physics, Department of Physics and Astronomy, Nuclear Physics. Natl Ctr Nucl Res, High Energy Phys Dept, Ul Hoza 69, PL-00681 Warsaw, Poland..
    Pysz, K.
    Polish Acad Sci, Henryk Niewodnicza nski Inst Nucl Phys, 152 Radzikowskiego St, PL-31342 Krakow, Poland..
    Pyszniak, Andrzej
    Uppsala University, Disciplinary Domain of Science and Technology, Physics, Department of Physics and Astronomy, Nuclear Physics. Jagiellonian Univ, Inst Phys, Ul Reymonta 4, PL-30059 Krakow, Poland..
    Ritman, J.
    Forschungszentrum Julich, Inst Kernphys, D-52425 Julich, Germany.;Forschungszentrum Julich, Julich Aachen Res Alliance, JARA FAME, D-52425 Julich, Germany.;Rhein Westfal TH Aachen, D-52056 Aachen, Germany.;Ruhr Univ Bochum, Inst Expt Phys 1, Univ Str 150, D-44780 Bochum, Germany..
    Roy, A.
    Indian Inst Technol Indore, Dept Phys, Khandwa Rd, Indore 452017, Madhya Pradesh, India..
    Rudy, Z.
    Jagiellonian Univ, Inst Phys, Ul Reymonta 4, PL-30059 Krakow, Poland..
    Rundel, O.
    Jagiellonian Univ, Inst Phys, Ul Reymonta 4, PL-30059 Krakow, Poland..
    Sawant, S.
    Indian Inst Technol, Dept Phys, Bombay 400076, Maharashtra, India.;Forschungszentrum Julich, Inst Kernphys, D-52425 Julich, Germany..
    Schadmand, S.
    Forschungszentrum Julich, Inst Kernphys, D-52425 Julich, Germany..
    Schatti-Ozerianska, I.
    Jagiellonian Univ, Inst Phys, Ul Reymonta 4, PL-30059 Krakow, Poland..
    Sefzick, T.
    Forschungszentrum Julich, Inst Kernphys, D-52425 Julich, Germany..
    Serdyuk, V.
    Forschungszentrum Julich, Inst Kernphys, D-52425 Julich, Germany..
    Shwartz, B.
    SB RAS, Budker Inst Nucl Phys, 11 Akad Lavrentieva Prospect, Novosibirsk 630090, Russia.;Novosibirsk State Univ, 2 Pirogova Str, Novosibirsk 630090, Russia..
    Sitterberg, K.
    Westfal Wilhelms Univ Munster, Inst Kernphys, Wilhelm Klemm Str 9, D-48149 Munster, Germany..
    Skorodko, T.
    Eberhard Karls Univ Tubingen, Inst Phys, Morgenstelle 14, D-72076 Tubingen, Germany.;Eberhard Karls Univ Tubingen, Kepler Ctr Astro & Particle Phys, Morgenstelle 14, D-72076 Tubingen, Germany.;Tomsk State Univ, Dept Phys, 36 Lenina Ave, Tomsk 634050, Russia..
    Skurzok, M.
    Jagiellonian Univ, Inst Phys, Ul Reymonta 4, PL-30059 Krakow, Poland..
    Smyrski, J.
    Jagiellonian Univ, Inst Phys, Ul Reymonta 4, PL-30059 Krakow, Poland..
    Sopovo, V.
    State Sci Ctr Russian Federat, Inst Theoret & Expt Phys, Bolshaya Cheremushkinskaya 25, Moscow 117218, Russia..
    Stassen, R.
    Forschungszentrum Julich, Inst Kernphys, D-52425 Julich, Germany..
    Stepaniak, J.
    Natl Ctr Nucl Res, High Energy Phys Dept, Ul Hoza 69, PL-00681 Warsaw, Poland..
    Stephan, E.
    Univ Silesia, August Chelkowski Inst Phys, Uniwersytecka 4, PL-40007 Katowice, Poland..
    Sterzenbach, G.
    Forschungszentrum Julich, Inst Kernphys, D-52425 Julich, Germany..
    Stockhorst, H.
    Forschungszentrum Julich, Inst Kernphys, D-52425 Julich, Germany..
    Stroher, H.
    Forschungszentrum Julich, Inst Kernphys, D-52425 Julich, Germany.;Forschungszentrum Julich, Julich Aachen Res Alliance, JARA FAME, D-52425 Julich, Germany.;Rhein Westfal TH Aachen, D-52056 Aachen, Germany..
    Szczurek, A.
    Polish Acad Sci, Henryk Niewodnicza nski Inst Nucl Phys, 152 Radzikowskiego St, PL-31342 Krakow, Poland..
    Trzcinski, A.
    Natl Ctr Nucl Res, Dept Nucl Phys, Ul Hoza 69, PL-00681 Warsaw, Poland..
    Varma, R.
    Indian Inst Technol, Dept Phys, Bombay 400076, Maharashtra, India..
    Wolke, Magnus
    Uppsala University, Disciplinary Domain of Science and Technology, Physics, Department of Physics and Astronomy, Nuclear Physics.
    Wronska, A.
    Jagiellonian Univ, Inst Phys, Ul Reymonta 4, PL-30059 Krakow, Poland..
    Wustner, P.
    Forschungszentrum Julich, Zent Inst Engn Elekt & Analyt, D-52425 Julich, Germany..
    Yamamoto, A.
    Uppsala University, Disciplinary Domain of Science and Technology, Physics, Department of Physics and Astronomy, Nuclear Physics. High Energy Accelerator Res Org KEK, Tsukuba, Ibaraki 3050801, Japan..
    Zabierowski, J.
    Uppsala University, Disciplinary Domain of Science and Technology, Physics, Department of Physics and Astronomy, Nuclear Physics. Natl Ctr Nucl Res, Dept Astrophys, Box 447, PL-90950 Lodz, Poland..
    Zielinski, M. J.
    Jagiellonian Univ, Inst Phys, Ul Reymonta 4, PL-30059 Krakow, Poland..
    Zink, A.
    Friedrich Alexander Univ Erlangen Nurnberg, Inst Phys, Erwin Rommel Str 1, D-91058 Erlangen, Germany..
    Zlomanczuk, Jozef
    Uppsala University, Disciplinary Domain of Science and Technology, Physics, Department of Physics and Astronomy, Nuclear Physics.
    Zupranski, P.
    Natl Ctr Nucl Res, Dept Nucl Phys, Ul Hoza 69, PL-00681 Warsaw, Poland..
    Zurek, M.
    Forschungszentrum Julich, Inst Kernphys, D-52425 Julich, Germany..
    Search for an isospin I=3 dibaryon2016In: Physics Letters B, ISSN 0370-2693, E-ISSN 1873-2445, Vol. 762, p. 455-461Article in journal (Refereed)
    Abstract [en]

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

  • 36.
    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.

  • 37.
    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.

  • 38.
    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.

  • 39.
    Adlarson, Patrik
    et al.
    Uppsala University, Disciplinary Domain of Science and Technology, Physics, Department of Physics and Astronomy, Nuclear Physics.
    Augustyniak, W.
    Bardan, W.
    Bashkanov, M.
    Bergmann, F. S.
    Berlowski, M.
    Bhatt, H.
    Buescher, M.
    Calén, Hans
    Uppsala University, Disciplinary Domain of Science and Technology, Physics, Department of Physics and Astronomy, Nuclear Physics.
    Ciepal, I.
    Clement, H.
    Coderre, D.
    Czerwinski, E.
    Demmich, K.
    Doroshkevich, E.
    Engels, R.
    Erven, W.
    Eyrich, W.
    Fedorets, P.
    Foehl, K.
    Fransson, Kjell E. I.
    Uppsala University, Disciplinary Domain of Science and Technology, Physics, Department of Physics and Astronomy, Nuclear Physics.
    Goldenbaum, F.
    Goslawski, P.
    Goswami, A.
    Grigoryev, K.
    Gullström, Carl-Oscar
    Uppsala University, Disciplinary Domain of Science and Technology, Physics, Department of Physics and Astronomy, Nuclear Physics.
    Hanhart, C.
    Hauenstein, F.
    Heijkenskjöld, Lena
    Uppsala University, Disciplinary Domain of Science and Technology, Physics, Department of Physics and Astronomy, Nuclear Physics.
    Hejny, V.
    Hinterberger, F.
    Hodana, M.
    Höistad, Bo
    Uppsala University, Disciplinary Domain of Science and Technology, Physics, Department of Physics and Astronomy, Nuclear Physics.
    Jany, A.
    Jany, B. R.
    Jarczyk, L.
    Johansson, Tord
    Uppsala University, Disciplinary Domain of Science and Technology, Physics, Department of Physics and Astronomy, Nuclear Physics.
    Kamys, B.
    Kemmerling, G.
    Khan, F. A.
    Khoukaz, A.
    Kirillov, D. A.
    Kistryn, S.
    Klaja, J.
    Kleines, H.
    Klos, B.
    Krapp, M.
    Krzemien, W.
    Kulessa, P.
    Kupsc, Andrzej
    Uppsala University, Disciplinary Domain of Science and Technology, Physics, Department of Physics and Astronomy, Nuclear Physics.
    Lalwani, K.
    Lersch, D.
    Li, L.
    Lorentz, B.
    Magiera, A.
    Maier, R.
    Marciniewski, Pawel
    Uppsala University, Disciplinary Domain of Science and Technology, Physics, Department of Physics and Astronomy, Nuclear Physics.
    Marianski, B.
    Mikirtychiants, M.
    Morsch, H. -P
    Moskal, P.
    Nandi, B. K.
    Ohm, H.
    Ozerianska, I.
    del Rio, E. Perez
    Piskunov, N. M.
    Plucinski, P.
    Uppsala University, Disciplinary Domain of Science and Technology, Physics, Department of Physics and Astronomy, Nuclear Physics.
    Podkopal, P.
    Prasuhn, D.
    Pricking, A.
    Pszczel, Damian
    Uppsala University, Disciplinary Domain of Science and Technology, Physics, Department of Physics and Astronomy, Nuclear Physics.
    Pysz, K.
    Pyszniak, Andrzej
    Uppsala University, Disciplinary Domain of Science and Technology, Physics, Department of Physics and Astronomy, Nuclear Physics.
    Redmer, C. F.
    Uppsala University, Disciplinary Domain of Science and Technology, Physics, Department of Physics and Astronomy, Nuclear Physics.
    Ritman, J.
    Roy, A.
    Rudy, Z.
    Sawant, S.
    Schmidt, A.
    Schadmand, S.
    Sefzick, T.
    Serdyuk, V.
    Shah, N.
    Siemaszko, M.
    Siudak, R.
    Skorodko, T.
    Skurzok, M.
    Smyrski, J.
    Sopov, V.
    Stassen, R.
    Stepaniak, J.
    Stephan, E.
    Sterzenbach, G.
    Stockhorst, H.
    Stroeher, H.
    Szczurek, A.
    Tolba, T.
    Trzcinski, A.
    Varma, R.
    Wagner, G. J.
    Weglorz, W.
    Wolke, Magnus
    Uppsala University, Disciplinary Domain of Science and Technology, Physics, Department of Physics and Astronomy, Nuclear Physics.
    Wronska, A.
    Wuestner, P.
    Wurm, P.
    Yamamoto, A.
    Yuan, X.
    Zabierowski, J.
    Zheng, C.
    Zielinski, M. J.
    Zipper, W.
    Zlomanczuk, Josef
    Uppsala University, Disciplinary Domain of Science and Technology, Physics, Department of Physics and Astronomy, Nuclear Physics.
    Zupranski, P.
    Zurek, M.
    Investigation of the dd -> (3)Hen pi(0) reaction with the FZ Julich WASA-at-COSY facility2013In: Physical Review C. Nuclear Physics, ISSN 0556-2813, E-ISSN 1089-490X, Vol. 88, no 1, p. 014004-Article in journal (Refereed)
    Abstract [en]

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

  • 40.
    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.

  • 41.
    Adlarson, Patrik
    et al.
    Uppsala University, Disciplinary Domain of Science and Technology, Physics, Department of Physics and Astronomy, Nuclear Physics. Johannes Gutenberg Univ Mainz, Inst Kernphys, Johann Joachim Becher Weg 45, D-55128 Mainz, Germany.
    Augustyniak, W.
    Natl Ctr Nucl Res, Dept Nucl Phys, Ul Hoza 69, PL-00681 Warsaw, Poland.
    Bardan, W.
    Jagiellonian Univ, Inst Phys, Prof Stanislawa Lojasiewicza 11, PL-30348 Krakow, Poland.
    Bashkanov, M.
    Univ Edinburgh, Sch Phys & Astron, James Clerk Maxwell Bldg,Peter Guthrie Tait Rd, Edinburgh EH9 3FD, Midlothian, Scotland.
    Bergmann, F. S.
    Westfal Wilhelms Univ Munster, Inst Kernphys, Wilhelm Klemm Str 9, D-48149 Munster, Germany.
    Berlowski, M.
    Natl Ctr Nucl Res, Dept High Energy Phys, Ul Hoza 69, PL-00681 Warsaw, Poland.
    Bondar, A.
    SB RAS, Budker Inst Nucl Phys, 11 Akad Lavrentieva Prospect, Novosibirsk 630090, Russia;Novosibirsk State Univ, 2 Pirogova Str, Novosibirsk 630090, Russia.
    Buescher, M.
    Forschungszentrum Julich, Peter Grunberg Inst, PGI Elektron Eigenschaften 6, D-52425 Julich, Germany;Heinrich Heine Univ Dusseldorf, Inst Laser & Plasmaphys, Univ Str 1, D-40225 Dusseldorf, Germany.
    Calén, Hans
    Uppsala University, Disciplinary Domain of Science and Technology, Physics, Department of Physics and Astronomy, Nuclear Physics.
    Ciepal, I.
    Polish Acad Sci, Henryk Niewodniczanski Inst Nucl Phys, Radzikowskiego 152, PL-31342 Krakow, Poland.
    Clement, H.
    Eberhard Karls Univ Tubingen, Phys Inst, Morgenstelle 14, D-72076 Tubingen, Germany;Univ Tubingen, Phys Inst, Kepler Ctr Astro & Teilchenphys, Morgenstelle 14, D-72076 Tubingen, Germany.
    Czerwinski, E.
    Jagiellonian Univ, Inst Phys, Prof Stanislawa Lojasiewicza 11, PL-30348 Krakow, Poland.
    Demmich, K.
    Westfal Wilhelms Univ Munster, Inst Kernphys, Wilhelm Klemm Str 9, D-48149 Munster, Germany.
    Engels, R.
    Forschungszentrum Julich, Inst Kernphys, D-52425 Julich, Germany.
    Erven, A.
    Forschungszentrum Julich, Zent Inst Engn Elekt & Analyt, D-52425 Julich, Germany.
    Erven, W.
    Forschungszentrum Julich, Zent Inst Engn Elekt & Analyt, D-52425 Julich, Germany.
    Eyrich, W.
    Friedrich Alexander Univ Erlangen Nurnberg, Phys Inst, Erwin Rommel Str 1, D-91058 Erlangen, Germany.
    Fedorets, P.
    Forschungszentrum Julich, Inst Kernphys, D-52425 Julich, Germany;Natl Res Ctr, Kurchatov Inst, Inst Theoret & Expt Phys, 25 Bolshaya Cheremushkinskaya, Moscow 117218, Russia.
    Foehl, K.
    Justus Liebig Univ Giessen, Phys Inst 2, Heinrich Buff Ring 16, D-35392 Giessen, Germany.
    Fransson, Kjell
    Uppsala University, Disciplinary Domain of Science and Technology, Physics, Department of Physics and Astronomy, Nuclear Physics.
    Goldenbaum, F.
    Forschungszentrum Julich, Inst Kernphys, D-52425 Julich, Germany.
    Goswami, A.
    Forschungszentrum Julich, Inst Kernphys, D-52425 Julich, Germany;Indian Inst Technol Indore, Dept Phys, Khandwa Rd, Indore 453552, Madhya Pradesh, India.
    Grigoryev, K.
    Forschungszentrum Julich, Inst Kernphys, D-52425 Julich, Germany;Natl Res Ctr, Kurchatov Inst, Div High Energy Phys, Petersburg Nucl Phys Inst, 1 Mkr Orlova Roshcha, Gatchina 188300, Russia.
    Gullström, Carl-Oskar
    Uppsala University, Disciplinary Domain of Science and Technology, Physics, Department of Physics and Astronomy, Nuclear Physics.
    Hanhart, C.
    Forschungszentrum Julich, Inst Kernphys, D-52425 Julich, Germany;Forschungszentrum Julich, Inst Adv Simulat, D-52425 Julich, Germany.
    Heijkenskjöld, Lena
    Uppsala University, Disciplinary Domain of Science and Technology, Physics, Department of Physics and Astronomy, Nuclear Physics.
    Hejny, V.
    Forschungszentrum Julich, Inst Kernphys, D-52425 Julich, Germany.
    Huesken, N.
    Westfal Wilhelms Univ Munster, Inst Kernphys, Wilhelm Klemm Str 9, D-48149 Munster, Germany.
    Jarczyk, L.
    Jagiellonian Univ, Inst Phys, Prof Stanislawa Lojasiewicza 11, PL-30348 Krakow, Poland.
    Johansson, Tord
    Uppsala University, Disciplinary Domain of Science and Technology, Physics, Department of Physics and Astronomy, Nuclear Physics.
    Kamys, B.
    Jagiellonian Univ, Inst Phys, Prof Stanislawa Lojasiewicza 11, PL-30348 Krakow, Poland.
    Kemmerling, G.
    Forschungszentrum Julich, Zent Inst Engn Elekt & Analyt, D-52425 Julich, Germany;Forschungszentrum Julich, JCNS, D-52425 Julich, Germany.
    Khatri, G.
    Jagiellonian Univ, Inst Phys, Prof Stanislawa Lojasiewicza 11, PL-30348 Krakow, Poland;Harvard Univ, Dept Phys, 17 Oxford St, Cambridge, MA 02138 USA.
    Khoukaz, A.
    Westfal Wilhelms Univ Munster, Inst Kernphys, Wilhelm Klemm Str 9, D-48149 Munster, Germany.
    Khreptak, O.
    Jagiellonian Univ, Inst Phys, Prof Stanislawa Lojasiewicza 11, PL-30348 Krakow, Poland.
    Kirillov, D. A.
    Joint Inst Nucl Phys, Veksler & Baldin Lab High Energy Phys, 6 Joliot Curie, Dubna 141980, Russia.
    Kistryn, S.
    Jagiellonian Univ, Inst Phys, Prof Stanislawa Lojasiewicza 11, PL-30348 Krakow, Poland.
    Kleines, H.
    Forschungszentrum Julich, Zent Inst Engn Elekt & Analyt, D-52425 Julich, Germany;Forschungszentrum Julich, JCNS, D-52425 Julich, Germany.
    Klos, B.
    Univ Silesia, August Chelkowski Inst Phys, Uniwersytecka 4, PL-40007 Katowice, Poland.
    Krzemien, W.
    Natl Ctr Nucl Res, Dept High Energy Phys, Ul Hoza 69, PL-00681 Warsaw, Poland.
    Kulessa, P.
    Polish Acad Sci, Henryk Niewodniczanski Inst Nucl Phys, Radzikowskiego 152, PL-31342 Krakow, Poland.
    Kupsc, Andrzej
    Uppsala University, Disciplinary Domain of Science and Technology, Physics, Department of Physics and Astronomy, Nuclear Physics. Natl Ctr Nucl Res, Dept High Energy Phys, Ul Hoza 69, PL-00681 Warsaw, Poland.
    Kuzmin, A.
    SB RAS, Budker Inst Nucl Phys, 11 Akad Lavrentieva Prospect, Novosibirsk 630090, Russia;Novosibirsk State Univ, 2 Pirogova Str, Novosibirsk 630090, Russia.
    Lalwani, K.
    Malaviya Natl Inst Technol Jaipur, Dept Phys, JLN Marg, Jaipur 302017, Rajasthan, India.
    Lersch, D.
    Forschungszentrum Julich, Inst Kernphys, D-52425 Julich, Germany.
    Lorentz, B.
    Forschungszentrum Julich, Inst Kernphys, D-52425 Julich, Germany.
    Magiera, A.
    Jagiellonian Univ, Inst Phys, Prof Stanislawa Lojasiewicza 11, PL-30348 Krakow, Poland.
    Maier, R.
    Forschungszentrum Julich, Inst Kernphys, D-52425 Julich, Germany;Forschungszentrum Julich, Julich Aachen Res Alliance, JARA FAME, D-52425 Julich, Germany;Rhein Westfal TH Aachen, D-52056 Aachen, Germany.
    Marciniewski, Pawel
    Uppsala University, Disciplinary Domain of Science and Technology, Physics, Department of Physics and Astronomy, Nuclear Physics.
    Marianski, B.
    Natl Ctr Nucl Res, Dept Nucl Phys, Ul Hoza 69, PL-00681 Warsaw, Poland.
    Morsch, H. -P
    Moskal, P.
    Jagiellonian Univ, Inst Phys, Prof Stanislawa Lojasiewicza 11, PL-30348 Krakow, Poland.
    Ohm, H.
    Forschungszentrum Julich, Inst Kernphys, D-52425 Julich, Germany.
    Parol, W.
    Polish Acad Sci, Henryk Niewodniczanski Inst Nucl Phys, Radzikowskiego 152, PL-31342 Krakow, Poland.
    del Rio, E. Perez
    Eberhard Karls Univ Tubingen, Phys Inst, Morgenstelle 14, D-72076 Tubingen, Germany;Univ Tubingen, Phys Inst, Kepler Ctr Astro & Teilchenphys, Morgenstelle 14, D-72076 Tubingen, Germany;Ist Nazl Fis Nucl, Lab Nazl Frascati, Via E Fermi 40, I-00044 Rome, Italy.
    Piskunov, N. M.
    Joint Inst Nucl Phys, Veksler & Baldin Lab High Energy Phys, 6 Joliot Curie, Dubna 141980, Russia.
    Prasuhn, D.
    Forschungszentrum Julich, Inst Kernphys, D-52425 Julich, Germany.
    Pszczel, Damian
    Uppsala University, Disciplinary Domain of Science and Technology, Physics, Department of Physics and Astronomy, Nuclear Physics. Natl Ctr Nucl Res, Dept High Energy Phys, Ul Hoza 69, PL-00681 Warsaw, Poland.
    Pysz, K.
    Polish Acad Sci, Henryk Niewodniczanski Inst Nucl Phys, Radzikowskiego 152, PL-31342 Krakow, Poland.
    Pyszniak, A.
    Uppsala University, Disciplinary Domain of Science and Technology, Physics, Department of Physics and Astronomy, Nuclear Physics. Jagiellonian Univ, Inst Phys, Prof Stanislawa Lojasiewicza 11, PL-30348 Krakow, Poland.
    Ritman, J.
    Forschungszentrum Julich, Inst Kernphys, D-52425 Julich, Germany;Forschungszentrum Julich, Julich Aachen Res Alliance, JARA FAME, D-52425 Julich, Germany;Rhein Westfal TH Aachen, D-52056 Aachen, Germany;Ruhr Univ Bochum, Inst Expt Phys 1, Univ Str 150, D-44780 Bochum, Germany.
    Roy, A.
    Indian Inst Technol Indore, Dept Phys, Khandwa Rd, Indore 453552, Madhya Pradesh, India.
    Rudy, Z.
    Jagiellonian Univ, Inst Phys, Prof Stanislawa Lojasiewicza 11, PL-30348 Krakow, Poland.
    Rundel, O.
    Jagiellonian Univ, Inst Phys, Prof Stanislawa Lojasiewicza 11, PL-30348 Krakow, Poland.
    Sawant, S.
    Indian Inst Technol, Dept Phys, Bombay 400076, Maharashtra, India.
    Schadmand, S.
    Forschungszentrum Julich, Inst Kernphys, D-52425 Julich, Germany.
    Schatti-Ozerianska, I.
    Jagiellonian Univ, Inst Phys, Prof Stanislawa Lojasiewicza 11, PL-30348 Krakow, Poland.
    Sefzick, T.
    Forschungszentrum Julich, Inst Kernphys, D-52425 Julich, Germany.
    Serdyuk, V.
    Forschungszentrum Julich, Inst Kernphys, D-52425 Julich, Germany.
    Shwartz, B.
    SB RAS, Budker Inst Nucl Phys, 11 Akad Lavrentieva Prospect, Novosibirsk 630090, Russia;Novosibirsk State Univ, 2 Pirogova Str, Novosibirsk 630090, Russia.
    Sitterberg, K.
    Westfal Wilhelms Univ Munster, Inst Kernphys, Wilhelm Klemm Str 9, D-48149 Munster, Germany.
    Skorodko, T.
    Eberhard Karls Univ Tubingen, Phys Inst, Morgenstelle 14, D-72076 Tubingen, Germany;Univ Tubingen, Phys Inst, Kepler Ctr Astro & Teilchenphys, Morgenstelle 14, D-72076 Tubingen, Germany;Tomsk State Univ, Dept Phys, 36 Lenina Ave, Tomsk 634050, Russia.
    Skurzok, M.
    Jagiellonian Univ, Inst Phys, Prof Stanislawa Lojasiewicza 11, PL-30348 Krakow, Poland.
    Smyrski, J.
    Jagiellonian Univ, Inst Phys, Prof Stanislawa Lojasiewicza 11, PL-30348 Krakow, Poland.
    Sopov, V.
    Natl Res Ctr, Kurchatov Inst, Inst Theoret & Expt Phys, 25 Bolshaya Cheremushkinskaya, Moscow 117218, Russia.
    Stassen, R.
    Forschungszentrum Julich, Inst Kernphys, D-52425 Julich, Germany.
    Stepaniak, J.
    Natl Ctr Nucl Res, Dept High Energy Phys, Ul Hoza 69, PL-00681 Warsaw, Poland.
    Stephan, E.
    Univ Silesia, August Chelkowski Inst Phys, Uniwersytecka 4, PL-40007 Katowice, Poland.
    Sterzenbach, G.
    Forschungszentrum Julich, Inst Kernphys, D-52425 Julich, Germany.
    Stockhorst, H.
    Forschungszentrum Julich, Inst Kernphys, D-52425 Julich, Germany.
    Stroeher, H.
    Forschungszentrum Julich, Inst Kernphys, D-52425 Julich, Germany;Forschungszentrum Julich, Julich Aachen Res Alliance, JARA FAME, D-52425 Julich, Germany;Rhein Westfal TH Aachen, D-52056 Aachen, Germany.
    Szczurek, A.
    Polish Acad Sci, Henryk Niewodniczanski Inst Nucl Phys, Radzikowskiego 152, PL-31342 Krakow, Poland.
    Trzcinski, A.
    Natl Ctr Nucl Res, Dept Nucl Phys, Ul Hoza 69, PL-00681 Warsaw, Poland.
    Wolke, Magnus
    Uppsala University, Disciplinary Domain of Science and Technology, Physics, Department of Physics and Astronomy, Nuclear Physics.
    Wronska, A.
    Jagiellonian Univ, Inst Phys, Prof Stanislawa Lojasiewicza 11, PL-30348 Krakow, Poland.
    Wuenstner, P.
    Forschungszentrum Julich, Zent Inst Engn Elekt & Analyt, D-52425 Julich, Germany.
    Yamamoto, A.
    High Energy Accelerator Res Org KEK, Tsukuba, Ibaraki 3050801, Japan.
    Zabierowski, J.
    Natl Ctr Nucl Res, Div Astrophys, Box 447, PL-90950 Lodz, Poland.
    Zielinski, M. J.
    Jagiellonian Univ, Inst Phys, Prof Stanislawa Lojasiewicza 11, PL-30348 Krakow, Poland.
    Zlomanczuk, Jozef
    Uppsala University, Disciplinary Domain of Science and Technology, Physics, Department of Physics and Astronomy, Nuclear Physics.
    Zupranski, P.
    Natl Ctr Nucl Res, Dept Nucl Phys, Ul Hoza 69, PL-00681 Warsaw, Poland.
    Zurek, M.
    Forschungszentrum Julich, Inst Kernphys, D-52425 Julich, Germany.
    Importance of d-wave contributions in the charge symmetry breaking reaction dd -> He-4 pi(0)2018In: Physics Letters B, ISSN 0370-2693, E-ISSN 1873-2445, Vol. 781, p. 645-650Article in journal (Refereed)
    Abstract [en]

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

  • 42.
    Adlarson, Patrik
    et al.
    Uppsala University, Disciplinary Domain of Science and Technology, Physics, Department of Physics and Astronomy, Nuclear Physics.
    Augustyniak, W.
    Natl Ctr Nucl Res, Dept Nucl Phys, Ul Hoza 69, PL-00681 Warsaw, Poland.
    Bardan, W.
    Jagiellonian Univ, Inst Phys, Prof Stanislawa Lojasiewicza 11, PL-30348 Krakow, Poland.
    Bashkanov, M.
    Univ Edinburgh, Sch Phys & Astron, James Clerk Maxwell Bldg,Peter Guthrie Tait Rd, Edinburgh EH9 3FD, Midlothian, Scotland.
    Bergmann, F. S.
    Westfalische Wilhelms Univ Munster, Inst Kernphys, Wilhelm Klemm Str 9, D-48149 Munster, Germany.
    Berlowski, M.
    Natl Ctr Nucl Res, High Energy Phys Dept, Ul Hoza 69, PL-00681 Warsaw, Poland.
    Bondar, A.
    RAS, Budker Inst Nucl Phys SB, 11 Akad Lavrentieva Prospect, Novosibirsk 630090, Russia;Novosibirsk State Univ, 2 Pirogova Str, Novosibirsk 630090, Russia.
    Buescher, M.
    Forschungszentrum Julich, PGI Elekt Eigenschaften 6, Peter Grunberg Inst, D-52425 Julich, Germany;Heinrich Heine Univ Dusseldorf, Inst Laser & Plasmaphys, Univ Str 1, D-40225 Dusseldorf, Germany.
    Calén, Hans
    Uppsala University, Disciplinary Domain of Science and Technology, Physics, Department of Physics and Astronomy, Nuclear Physics.
    Ciepal, I.
    Polish Acad Sci, Henryk Niewodniczanski Inst Nucl Phys, Radzikowskiego 152, PL-31342 Krakow, Poland.
    Clement, H.
    Eberhard Karls Univ Tubingen, Phys Inst, Morgenstelle 14, D-72076 Tubingen, Germany;Univ Tubingen, Phys Inst, Kepler Ctr Astro & Teilchenphys, Morgenstelle 14, D-72076 Tubingen, Germany.
    Czerwinski, E.
    Jagiellonian Univ, Inst Phys, Prof Stanislawa Lojasiewicza 11, PL-30348 Krakow, Poland.
    Demmich, K.
    Westfalische Wilhelms Univ Munster, Inst Kernphys, Wilhelm Klemm Str 9, D-48149 Munster, Germany.
    Engels, R.
    Forschungszentrum Julich, Inst Kernphys, D-52425 Julich, Germany.
    Erven, A.
    Forschungszentrum Julich, Zentralinst Engn Elekt & Analyt, D-52425 Julich, Germany.
    Erven, W.
    Forschungszentrum Julich, Zentralinst Engn Elekt & Analyt, D-52425 Julich, Germany.
    Eyrich, W.
    Friedrich Alexander Univ Erlangen Nurnberg, Phys Inst, Erwin Rommel Str 1, D-91058 Erlangen, Germany.
    Fedorets, P.
    Forschungszentrum Julich, Inst Kernphys, D-52425 Julich, Germany;Kurchatov Inst, Natl Res Ctr, Inst Theoret & Expt Phys, 25 Bolshaya Cheremushkinskaya, Moscow 117911, Russia.
    Foehl, K.
    Justus Liebig Univ Giessen, Phys Inst 2, Heinrich Buff Ring 16, D-35392 Giessen, Germany.
    Fransson, Kjell
    Uppsala University, Disciplinary Domain of Science and Technology, Physics, Department of Physics and Astronomy, Nuclear Physics.
    Goldenbaum, F.
    Forschungszentrum Julich, Inst Kernphys, D-52425 Julich, Germany.
    Goswami, A.
    Forschungszentrum Julich, Inst Kernphys, D-52425 Julich, Germany;Indian Inst Technol Indore, Dept Phys, Khandwa Rd, Indore 453552, Madhya Pradesh, India.
    Grigoryev, K.
    Forschungszentrum Julich, Inst Kernphys, D-52425 Julich, Germany;Kurchatov Inst, Natl Res Ctr, Petersburg Nucl Phys Inst, High Energy Phys Div, 1 Mkr Orlova Roshcha, Gatchina 188300, Russia.
    Gullström, Carl-Oskar
    Uppsala University, Disciplinary Domain of Science and Technology, Physics, Department of Physics and Astronomy, Nuclear Physics.
    Heijkenskjöld, Lena
    Uppsala University, Disciplinary Domain of Science and Technology, Physics, Department of Physics and Astronomy, Nuclear Physics.
    Hejny, V.
    Forschungszentrum Julich, Inst Kernphys, D-52425 Julich, Germany.
    Huesken, N.
    Westfalische Wilhelms Univ Munster, Inst Kernphys, Wilhelm Klemm Str 9, D-48149 Munster, Germany.
    Jarczyk, L.
    Jagiellonian Univ, Inst Phys, Prof Stanislawa Lojasiewicza 11, PL-30348 Krakow, Poland.
    Johansson, Tord
    Uppsala University, Disciplinary Domain of Science and Technology, Physics, Department of Physics and Astronomy, Nuclear Physics.
    Kamys, B.
    Jagiellonian Univ, Inst Phys, Prof Stanislawa Lojasiewicza 11, PL-30348 Krakow, Poland.
    Kemmerling, G.
    Forschungszentrum Julich, Zentralinst Engn Elekt & Analyt, D-52425 Julich, Germany;Forschungszentrum Julich, JCNS, D-52425 Julich, Germany.
    Khatri, G.
    Jagiellonian Univ, Inst Phys, Prof Stanislawa Lojasiewicza 11, PL-30348 Krakow, Poland;Harvard Univ, Dept Phys, 17 Oxford St, Cambridge, MA 02138 USA.
    Khoukaz, A.
    Westfalische Wilhelms Univ Munster, Inst Kernphys, Wilhelm Klemm Str 9, D-48149 Munster, Germany.
    Khreptak, A.
    Jagiellonian Univ, Inst Phys, Prof Stanislawa Lojasiewicza 11, PL-30348 Krakow, Poland.
    Kirillov, D. A.
    Joint Inst Nucl Res, Veksler & Baldin Lab High Energy Phys, 6 Joliot Curie, Dubna 141980, Russia.
    Kistryn, S.
    Jagiellonian Univ, Inst Phys, Prof Stanislawa Lojasiewicza 11, PL-30348 Krakow, Poland.
    Kleines, H.
    Forschungszentrum Julich, Zentralinst Engn Elekt & Analyt, D-52425 Julich, Germany;Forschungszentrum Julich, JCNS, D-52425 Julich, Germany.
    Klos, B.
    Univ Silesia, August Chelkowski Inst Phys, Uniwersytecka 4, PL-40007 Katowice, Poland.
    Krzemien, W.
    Natl Ctr Nucl Res, High Energy Phys Dept, Ul Hoza 69, PL-00681 Warsaw, Poland.
    Kulessa, P.
    Polish Acad Sci, Henryk Niewodniczanski Inst Nucl Phys, Radzikowskiego 152, PL-31342 Krakow, Poland.
    Kupsc, Andrzej
    Uppsala University, Disciplinary Domain of Science and Technology, Physics, Department of Physics and Astronomy, Nuclear Physics.
    Kuzmin, A.
    RAS, Budker Inst Nucl Phys SB, 11 Akad Lavrentieva Prospect, Novosibirsk 630090, Russia;Novosibirsk State Univ, 2 Pirogova Str, Novosibirsk 630090, Russia.
    Lalwani, K.
    Malaviya Natl Inst Technol Jaipur, Dept Phys, JLN Marg, Jaipur 302017, Rajasthan, India.
    Lersch, D.
    Forschungszentrum Julich, Inst Kernphys, D-52425 Julich, Germany.
    Lorentz, B.
    Forschungszentrum Julich, Inst Kernphys, D-52425 Julich, Germany.
    Magiera, A.
    Jagiellonian Univ, Inst Phys, Prof Stanislawa Lojasiewicza 11, PL-30348 Krakow, Poland.
    Maier, R.
    Forschungszentrum Julich, Inst Kernphys, D-52425 Julich, Germany;Forschungszentrum Julich, Julich Aachen Res Alliance, JARA FAME, Aachen, Germany;Rhein Westfal TH Aachen, Aachen, Germany.
    Marciniewski, Pawel
    Uppsala University, Disciplinary Domain of Science and Technology, Physics, Department of Physics and Astronomy, Nuclear Physics.
    Marianski, B.
    Natl Ctr Nucl Res, Dept Nucl Phys, Ul Hoza 69, PL-00681 Warsaw, Poland.
    Morsch, H. -P
    Moskal, P.
    Jagiellonian Univ, Inst Phys, Prof Stanislawa Lojasiewicza 11, PL-30348 Krakow, Poland.
    Ohm, H.
    Forschungszentrum Julich, Inst Kernphys, D-52425 Julich, Germany.
    Parol, W.
    Polish Acad Sci, Henryk Niewodniczanski Inst Nucl Phys, Radzikowskiego 152, PL-31342 Krakow, Poland.
    del Rio, E. Perez
    Eberhard Karls Univ Tubingen, Phys Inst, Morgenstelle 14, D-72076 Tubingen, Germany;Univ Tubingen, Phys Inst, Kepler Ctr Astro & Teilchenphys, Morgenstelle 14, D-72076 Tubingen, Germany;INFN, Lab Nazl Frascati, Via E Fermi 40, I-00044 Frascati, Roma, Italy.
    Piskunov, N. M.
    Joint Inst Nucl Res, Veksler & Baldin Lab High Energy Phys, 6 Joliot Curie, Dubna 141980, Russia.
    Prasuhn, D.
    Forschungszentrum Julich, Inst Kernphys, D-52425 Julich, Germany.
    Pszczel, Damian
    Uppsala University, Disciplinary Domain of Science and Technology, Physics, Department of Physics and Astronomy, Nuclear Physics.
    Pysz, K.
    Polish Acad Sci, Henryk Niewodniczanski Inst Nucl Phys, Radzikowskiego 152, PL-31342 Krakow, Poland.
    Pyszniak, Andzej
    Uppsala University, Disciplinary Domain of Science and Technology, Physics, Department of Physics and Astronomy, Nuclear Physics.
    Ritman, J.
    Forschungszentrum Julich, Inst Kernphys, D-52425 Julich, Germany;Forschungszentrum Julich, Julich Aachen Res Alliance, JARA FAME, Aachen, Germany;Rhein Westfal TH Aachen, Aachen, Germany;Ruhr Univ Bochum, Inst Expt Phys 1, Univ Str 150, D-44780 Bochum, Germany.
    Roy, A.
    Indian Inst Technol Indore, Dept Phys, Khandwa Rd, Indore 453552, Madhya Pradesh, India.
    Rudy, Z.
    Jagiellonian Univ, Inst Phys, Prof Stanislawa Lojasiewicza 11, PL-30348 Krakow, Poland.
    Rundel, O.
    Jagiellonian Univ, Inst Phys, Prof Stanislawa Lojasiewicza 11, PL-30348 Krakow, Poland.
    Sawant, S.
    Ruhr Univ Bochum, Inst Expt Phys 1, Univ Str 150, D-44780 Bochum, Germany.
    Schadmand, S.
    Forschungszentrum Julich, Inst Kernphys, D-52425 Julich, Germany.
    Schatti-Ozerianska, I.
    Jagiellonian Univ, Inst Phys, Prof Stanislawa Lojasiewicza 11, PL-30348 Krakow, Poland.
    Sefzick, T.
    Forschungszentrum Julich, Inst Kernphys, D-52425 Julich, Germany.
    Serdyuk, V.
    Forschungszentrum Julich, Inst Kernphys, D-52425 Julich, Germany.
    Shwartz, B.
    RAS, Budker Inst Nucl Phys SB, 11 Akad Lavrentieva Prospect, Novosibirsk 630090, Russia;Novosibirsk State Univ, 2 Pirogova Str, Novosibirsk 630090, Russia.
    Sitterberg, K.
    Westfalische Wilhelms Univ Munster, Inst Kernphys, Wilhelm Klemm Str 9, D-48149 Munster, Germany.
    Skorodko, T.
    Eberhard Karls Univ Tubingen, Phys Inst, Morgenstelle 14, D-72076 Tubingen, Germany;Univ Tubingen, Phys Inst, Kepler Ctr Astro & Teilchenphys, Morgenstelle 14, D-72076 Tubingen, Germany;Tomsk State Univ, Dept Phys, 36 Lenina Ave, Tomsk 634050, Russia.
    Skurzok, M.
    Jagiellonian Univ, Inst Phys, Prof Stanislawa Lojasiewicza 11, PL-30348 Krakow, Poland.
    Smyrski, J.
    Jagiellonian Univ, Inst Phys, Prof Stanislawa Lojasiewicza 11, PL-30348 Krakow, Poland.
    Sopov, V.
    Kurchatov Inst, Natl Res Ctr, Inst Theoret & Expt Phys, 25 Bolshaya Cheremushkinskaya, Moscow 117911, Russia.
    Stassen, R.
    Forschungszentrum Julich, Inst Kernphys, D-52425 Julich, Germany.
    Stepaniak, J.
    Natl Ctr Nucl Res, High Energy Phys Dept, Ul Hoza 69, PL-00681 Warsaw, Poland.
    Stephan, E.
    Univ Silesia, August Chelkowski Inst Phys, Uniwersytecka 4, PL-40007 Katowice, Poland.
    Sterzenbach, G.
    Forschungszentrum Julich, Inst Kernphys, D-52425 Julich, Germany.
    Stockhorst, H.
    Forschungszentrum Julich, Inst Kernphys, D-52425 Julich, Germany.
    Stroeher, H.
    Forschungszentrum Julich, Inst Kernphys, D-52425 Julich, Germany;Forschungszentrum Julich, Julich Aachen Res Alliance, JARA FAME, Aachen, Germany;Rhein Westfal TH Aachen, Aachen, Germany.
    Szczurek, A.
    Polish Acad Sci, Henryk Niewodniczanski Inst Nucl Phys, Radzikowskiego 152, PL-31342 Krakow, Poland.
    Trzcinski, A.
    Natl Ctr Nucl Res, Dept Nucl Phys, Ul Hoza 69, PL-00681 Warsaw, Poland.
    Wolke, Magnus
    Uppsala University, Disciplinary Domain of Science and Technology, Physics, Department of Physics and Astronomy, Nuclear Physics.
    Wronska, A.
    Jagiellonian Univ, Inst Phys, Prof Stanislawa Lojasiewicza 11, PL-30348 Krakow, Poland.
    Wuestner, P.
    Forschungszentrum Julich, Zentralinst Engn Elekt & Analyt, D-52425 Julich, Germany.
    Yamamoto, A.
    High Energy Accelerator Res Org KEK, Tsukuba, Ibaraki 3050801, Japan.
    Zabierowski, J.
    Natl Ctr Nucl Res, Astrophys Div, Box 447, PL-90950 Lodz, Poland.
    Zielinski, M. J.
    Jagiellonian Univ, Inst Phys, Prof Stanislawa Lojasiewicza 11, PL-30348 Krakow, Poland.
    Zlomanczuk, Jozef
    Uppsala University, Disciplinary Domain of Science and Technology, Physics, Department of Physics and Astronomy, Nuclear Physics.
    Zupranski, P.
    Natl Ctr Nucl Res, Dept Nucl Phys, Ul Hoza 69, PL-00681 Warsaw, Poland.
    Zurek, M.
    Forschungszentrum Julich, Inst Kernphys, D-52425 Julich, Germany.
    Wilkin, C.
    UCL, Phys & Astron Dept, Gower St, London WC1E 6BT, England.
    Backward single-pion production in the pd -> He-3 pi(0)reaction with WASA-at-COSY2018In: European Physical Journal A, ISSN 1434-6001, E-ISSN 1434-601X, Vol. 54, no 9, article id 149Article in journal (Refereed)
    Abstract [en]

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

  • 43.
    Adlarson, Patrik
    et al.
    Uppsala University, Disciplinary Domain of Science and Technology, Physics, Department of Physics and Astronomy, Nuclear Physics.
    Augustyniak, W.
    Natl Ctr Nucl Res, Div Nucl Phys, Ul Hoza 69, PL-00681 Warsaw, Poland.
    Bardan, W.
    Jagiellonian Univ, Inst Phys, Prof Stanislawa Lojasiewicza 11, PL-30348 Krakow, Poland.
    Bashkanov, M.
    Univ York, Dept Phys, York YO10 5DD, N Yorkshire, England.
    Bergmann, F. S.
    Westfalische Wilhelms Univ Munster, Inst Kernphys, Wilhelm Klemm Str 9, D-48149 Munster, Germany.
    Berlowski, M.
    Natl Ctr Nucl Res, High Energy Phys Div, Ul Hoza 69, PL-00681 Warsaw, Poland.
    Bondar, A.
    RAS, SB, Budker Inst Nucl Phys, 11 Acad Lavrentieva Pr, Novosibirsk 630090, Russia;Novosibirsk State Univ, 2 Pirogova Str, Novosibirsk 630090, Russia.
    Buescher, M.
    Forschungszentrum Julich, Peter Grunberg Inst, PGI 6 Elekt Eigenschaften, D-52425 Julich, Germany;Heinrich Heine Univ Dusseldorf, Inst Laser & Plasmaphys, Univ Str 1, D-40225 Dusseldorf, Germany.
    Calén, Hans
    Uppsala University, Disciplinary Domain of Science and Technology, Physics, Department of Physics and Astronomy, Nuclear Physics.
    Ciepal, I.
    Polish Acad Sci, Henryk Niewodniczanski Inst Nucl Phys, Ul Radzikowskiego 152, PL-31342 Krakow, Poland.
    Clement, H.
    Eberhard Karls Univ Tubingen, Inst Phys, Morgenstelle 14, D-72076 Tubingen, Germany;Univ Tubingen, Inst Phys, Kepler Ctr Astro & Particle Phys, Morgenstelle 14, D-72076 Tubingen, Germany.
    Czerwinski, E.
    Jagiellonian Univ, Inst Phys, Prof Stanislawa Lojasiewicza 11, PL-30348 Krakow, Poland.
    Demmich, K.
    Westfalische Wilhelms Univ Munster, Inst Kernphys, Wilhelm Klemm Str 9, D-48149 Munster, Germany.
    Engels, R.
    Forschungszentrum Julich, Inst Kernphys, D-52425 Julich, Germany.
    Erven, A.
    Forschungszentrum Julich, Zent Inst Engn Elekt & Analyt, D-52425 Julich, Germany.
    Erven, W.
    Forschungszentrum Julich, Zent Inst Engn Elekt & Analyt, D-52425 Julich, Germany.
    Eyrich, W.
    Friedrich Alexander Univ Erlangen Nurnberg, Inst Phys, Erwin Rommel Str 1, D-91058 Erlangen, Germany.
    Fedorets, P.
    Forschungszentrum Julich, Inst Kernphys, D-52425 Julich, Germany;Natl Res Ctr Kurchatov Inst, Inst Theoret & Expt Phys, 25 Bolshaya Cheremushkinskaya Str, Moscow 117218, Russia.
    Foehl, K.
    Justus Liebig Univ Giessen, Inst Phys 2, Heinrich Buff Ring 16, D-35392 Giessen, Germany.
    Fransson, Kjell
    Uppsala University, Disciplinary Domain of Science and Technology, Physics, Department of Physics and Astronomy, Nuclear Physics.
    Goldenbaum, F.
    Forschungszentrum Julich, Inst Kernphys, D-52425 Julich, Germany.
    Goswami, A.
    Forschungszentrum Julich, Inst Kernphys, D-52425 Julich, Germany;Indian Inst Technol Indore, Discipline Phys, Khandwa Rd, Indore 453552, Madhya Pradesh, India.
    Grigoryev, K.
    Forschungszentrum Julich, Inst Kernphys, D-52425 Julich, Germany;Natl Res Ctr Kurchatov Inst, High Energy Phys Div, Petersburg Nucl Phys Inst, 1 Mkr Orlova roshcha, Gatchina 188300, Leningradskaya, Russia.
    Heijkenskjöld, Lena
    Uppsala University, Disciplinary Domain of Science and Technology, Physics, Department of Physics and Astronomy, Nuclear Physics. Johannes Gutenberg Univ Mainz, Inst Kernphys, Johann Joachim Becher Weg 45, D-55128 Mainz, Germany.
    Hejny, V.
    Forschungszentrum Julich, Inst Kernphys, D-52425 Julich, Germany.
    Huesken, N.
    Westfalische Wilhelms Univ Munster, Inst Kernphys, Wilhelm Klemm Str 9, D-48149 Munster, Germany.
    Jarczyk, L.
    Jagiellonian Univ, Inst Phys, Prof Stanislawa Lojasiewicza 11, PL-30348 Krakow, Poland.
    Johansson, Tord
    Uppsala University, Disciplinary Domain of Science and Technology, Physics, Department of Physics and Astronomy, Nuclear Physics.
    Kamys, B.
    Jagiellonian Univ, Inst Phys, Prof Stanislawa Lojasiewicza 11, PL-30348 Krakow, Poland.
    Kemmerling, G.
    Forschungszentrum Julich, Zent Inst Engn Elekt & Analyt, D-52425 Julich, Germany;Forschungszentrum Julich, JCNS, D-52425 Julich, Germany.
    Khoukaz, A.
    Westfalische Wilhelms Univ Munster, Inst Kernphys, Wilhelm Klemm Str 9, D-48149 Munster, Germany.
    Khreptak, O.
    Jagiellonian Univ, Inst Phys, Prof Stanislawa Lojasiewicza 11, PL-30348 Krakow, Poland.
    Kirillov, D. A.
    Joint Inst Nucl Phys, Veksler & Baldin Lab High Energiy Phys, 6 Joliot Curie, Dubna 141980, Russia.
    Kistryn, S.
    Jagiellonian Univ, Inst Phys, Prof Stanislawa Lojasiewicza 11, PL-30348 Krakow, Poland.
    Kleines, H.
    Forschungszentrum Julich, Zent Inst Engn Elekt & Analyt, D-52425 Julich, Germany;Forschungszentrum Julich, JCNS, D-52425 Julich, Germany.
    Klos, B.
    Univ Silesia, August Chelkowski Inst Phys, Ul 75 Pulku Piechoty 1, PL-41500 Chorzow, Poland.
    Krzemien, W.
    Natl Ctr Nucl Res, High Energy Phys Div, Ul Hoza 69, PL-00681 Warsaw, Poland.
    Kulessa, P.
    Polish Acad Sci, Henryk Niewodniczanski Inst Nucl Phys, Ul Radzikowskiego 152, PL-31342 Krakow, Poland.
    Kupsc, Andrzej
    Uppsala University, Disciplinary Domain of Science and Technology, Physics, Department of Physics and Astronomy, Nuclear Physics. Natl Ctr Nucl Res, High Energy Phys Div, Ul Hoza 69, PL-00681 Warsaw, Poland.
    Lalwani, K.
    Malaviya Natl Inst Technol Jaipur, Dept Phys, JLN Marg, Jaipur 302017, Rajasthan, India.
    Lersch, D.
    Forschungszentrum Julich, Inst Kernphys, D-52425 Julich, Germany;Florida State Univ, Dept Phys, 77 Chieftan Way, Tallahassee, FL 32306 USA.
    Lorentz, B.
    Forschungszentrum Julich, Inst Kernphys, D-52425 Julich, Germany.
    Magiera, A.
    Jagiellonian Univ, Inst Phys, Prof Stanislawa Lojasiewicza 11, PL-30348 Krakow, Poland.
    Maier, R.
    Forschungszentrum Julich, Inst Kernphys, D-52425 Julich, Germany;Forschungszentrum Julich, JARA FAME, Julich Aachen Res Alliance, D-52425 Julich, Germany;Rhein Westfal TH Aachen, D-52056 Aachen, Germany.
    Marciniewski, Pawel
    Uppsala University, Disciplinary Domain of Science and Technology, Physics, Department of Physics and Astronomy, Nuclear Physics.
    Marianski, B.
    Natl Ctr Nucl Res, Div Nucl Phys, Ul Hoza 69, PL-00681 Warsaw, Poland.
    Morsch, H. -P
    Moskal, P.
    Jagiellonian Univ, Inst Phys, Prof Stanislawa Lojasiewicza 11, PL-30348 Krakow, Poland.
    Ohm, H.
    Forschungszentrum Julich, Inst Kernphys, D-52425 Julich, Germany.
    Parol, W.
    Polish Acad Sci, Henryk Niewodniczanski Inst Nucl Phys, Ul Radzikowskiego 152, PL-31342 Krakow, Poland.
    del Rio, E. Perez
    Eberhard Karls Univ Tubingen, Inst Phys, Morgenstelle 14, D-72076 Tubingen, Germany;Univ Tubingen, Inst Phys, Kepler Ctr Astro & Particle Phys, Morgenstelle 14, D-72076 Tubingen, Germany;Ist Nazl Fis Nucl, Lab Nazl Frascati, Via E Fermi 40, I-00044 Frascati, Italy.
    Piskunov, N. M.
    Joint Inst Nucl Phys, Veksler & Baldin Lab High Energiy Phys, 6 Joliot Curie, Dubna 141980, Russia.
    Prasuhn, D.
    Forschungszentrum Julich, Inst Kernphys, D-52425 Julich, Germany.
    Pszczel, Damian
    Uppsala University, Disciplinary Domain of Science and Technology, Physics, Department of Physics and Astronomy, Nuclear Physics. Natl Ctr Nucl Res, High Energy Phys Div, Ul Hoza 69, PL-00681 Warsaw, Poland.
    Pysz, K.
    Polish Acad Sci, Henryk Niewodniczanski Inst Nucl Phys, Ul Radzikowskiego 152, PL-31342 Krakow, Poland.
    Ritman, J.
    Forschungszentrum Julich, Inst Kernphys, D-52425 Julich, Germany;Forschungszentrum Julich, JARA FAME, Julich Aachen Res Alliance, D-52425 Julich, Germany;Rhein Westfal TH Aachen, D-52056 Aachen, Germany;Ruhr Univ Bochum, Inst Expt Phys 1, Univ Str 150, D-44780 Bochum, Germany.
    Roy, A.
    Indian Inst Technol Indore, Discipline Phys, Khandwa Rd, Indore 453552, Madhya Pradesh, India.
    Rudy, Z.
    Jagiellonian Univ, Inst Phys, Prof Stanislawa Lojasiewicza 11, PL-30348 Krakow, Poland.
    Rundel, O.
    Jagiellonian Univ, Inst Phys, Prof Stanislawa Lojasiewicza 11, PL-30348 Krakow, Poland.
    Sawant, S.
    Indian Inst Technol, Dept Phys, Mumbai 400076, Maharashtra, India.
    Schadmand, S.
    Forschungszentrum Julich, Inst Kernphys, D-52425 Julich, Germany.
    Schatti-Ozerianska, I.
    Jagiellonian Univ, Inst Phys, Prof Stanislawa Lojasiewicza 11, PL-30348 Krakow, Poland.
    Sefzick, T.
    Forschungszentrum Julich, Inst Kernphys, D-52425 Julich, Germany.
    Serdyuk, V.
    Forschungszentrum Julich, Inst Kernphys, D-52425 Julich, Germany.
    Shwartz, B.
    RAS, SB, Budker Inst Nucl Phys, 11 Acad Lavrentieva Pr, Novosibirsk 630090, Russia;Novosibirsk State Univ, 2 Pirogova Str, Novosibirsk 630090, Russia.
    Skorodko, T.
    Eberhard Karls Univ Tubingen, Inst Phys, Morgenstelle 14, D-72076 Tubingen, Germany;Univ Tubingen, Inst Phys, Kepler Ctr Astro & Particle Phys, Morgenstelle 14, D-72076 Tubingen, Germany;Tomsk State Univ, Dept Phys, 36 Lenin Ave, Tomsk 634050, Russia.
    Skurzok, M.
    Jagiellonian Univ, Inst Phys, Prof Stanislawa Lojasiewicza 11, PL-30348 Krakow, Poland.
    Smyrski, J.
    Jagiellonian Univ, Inst Phys, Prof Stanislawa Lojasiewicza 11, PL-30348 Krakow, Poland.
    Sopov, V.
    Natl Res Ctr Kurchatov Inst, Inst Theoret & Expt Phys, 25 Bolshaya Cheremushkinskaya Str, Moscow 117218, Russia.
    Stassen, R.
    Forschungszentrum Julich, Inst Kernphys, D-52425 Julich, Germany.
    Stepaniak, J.
    Natl Ctr Nucl Res, High Energy Phys Div, Ul Hoza 69, PL-00681 Warsaw, Poland.
    Stephan, E.
    Univ Silesia, August Chelkowski Inst Phys, Ul 75 Pulku Piechoty 1, PL-41500 Chorzow, Poland.
    Sterzenbach, G.
    Forschungszentrum Julich, Inst Kernphys, D-52425 Julich, Germany.
    Stockhorst, H.
    Forschungszentrum Julich, Inst Kernphys, D-52425 Julich, Germany.
    Stroeher, H.
    Forschungszentrum Julich, Inst Kernphys, D-52425 Julich, Germany;Forschungszentrum Julich, JARA FAME, Julich Aachen Res Alliance, D-52425 Julich, Germany;Rhein Westfal TH Aachen, D-52056 Aachen, Germany.
    Szczurek, A.
    Polish Acad Sci, Henryk Niewodniczanski Inst Nucl Phys, Ul Radzikowskiego 152, PL-31342 Krakow, Poland.
    Trzcinski, A.
    Natl Ctr Nucl Res, Div Nucl Phys, Ul Hoza 69, PL-00681 Warsaw, Poland.
    Wolke, Magnus
    Uppsala University, Disciplinary Domain of Science and Technology, Physics, Department of Physics and Astronomy, Nuclear Physics.
    Wronska, A.
    Jagiellonian Univ, Inst Phys, Prof Stanislawa Lojasiewicza 11, PL-30348 Krakow, Poland.
    Wuestner, P.
    Forschungszentrum Julich, Zent Inst Engn Elekt & Analyt, D-52425 Julich, Germany.
    Yamamoto, A.
    High Energy Accelerator Res Org KEK, Tsukuba, Ibaraki 3050801, Japan.
    Zabierowski, J.
    Natl Ctr Nucl Res, Div Astrophys, Box 447, PL-90950 Lodz, Poland.
    Zielinski, M. J.
    Jagiellonian Univ, Inst Phys, Prof Stanislawa Lojasiewicza 11, PL-30348 Krakow, Poland.
    Zlomanczuk, Jozef
    Uppsala University, Disciplinary Domain of Science and Technology, Physics, Department of Physics and Astronomy, Nuclear Physics.
    Zupranski, P.
    Natl Ctr Nucl Res, Div Nucl Phys, Ul Hoza 69, PL-00681 Warsaw, Poland.
    Zurek, M.
    Forschungszentrum Julich, Inst Kernphys, D-52425 Julich, Germany.
    Examination of the production of an isotensor dibaryon in the pp -> pp pi(+)pi(-) reaction2019In: Physical Review C: Covering Nuclear Physics, ISSN 2469-9985, E-ISSN 2469-9993, Vol. 99, no 2, article id 025201Article in journal (Refereed)
    Abstract [en]

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

  • 44.
    Adlarson, Patrik
    et al.
    Uppsala University, Disciplinary Domain of Science and Technology, Physics, Department of Physics and Astronomy, Nuclear Physics.
    Augustyniak, W.
    Natl Ctr Nucl Res, Div Nucl Phys, Ulica Hoza 69, PL-00681 Warsaw, Poland.
    Bardan, W.
    Jagiellonian Univ, Inst Phys, Ulica Prof Stanislawa Lojasiewicza 11, PL-30348 Krakow, Poland.
    Bashkanov, M.
    Univ York, Dept Phys, York YO10 5DD, N Yorkshire, England.
    Bergmann, F. S.
    Westfalische Wilhelms Univ Munster, Inst Kernphys, Wilhelm Klemm Str 9, D-48149 Munster, Germany.
    Berlowski, M.
    Natl Ctr Nucl Res, Div High Energy Phys, Ulica Hoza 69, PL-00681 Warsaw, Poland.
    Bondar, A.
    Novosibirsk State Univ, 2 Pirogova Ulitsa, Novosibirsk 630090, Russia;Budker Inst Nucl Phys SB RAS, 11 Akad Lavrentieva Prospekt, Novosibirsk 630090, Russia.
    Buescher, M.
    Heinrich Heine Univ Dusseldorf, Inst Laser & Plasmaphys, Univ Str 1, D-40225 Dusseldorf, Germany;Forschungszentrum Julich, Peter Grunberg Inst, PGI Elektron Eigenschaften 6, D-52425 Julich, Germany.
    Calén, Hans
    Uppsala University, Disciplinary Domain of Science and Technology, Physics, Department of Physics and Astronomy, Nuclear Physics.
    Ciepal, I.
    Polish Acad Sci, Henryk Niewodniczanski Inst Nucl Phys, Ulica Radzikowskiego 152, PL-31342 Krakow, Poland.
    Clement, H.
    Eberhard Karls Univ Tubingen, Phys Inst, Morgenstelle 14, D-72076 Tubingen, Germany;Univ Tubingen, Phys Inst, Kepler Ctr Astro & Particle Phys, Morgenstelle 14, D-72076 Tubingen, Germany.
    Czerwinski, E.
    Jagiellonian Univ, Inst Phys, Ulica Prof Stanislawa Lojasiewicza 11, PL-30348 Krakow, Poland.
    Demmich, K.
    Westfalische Wilhelms Univ Munster, Inst Kernphys, Wilhelm Klemm Str 9, D-48149 Munster, Germany.
    Engels, R.
    Forschungszentrum Julich, Inst Kernphys, D-52425 Julich, Germany.
    Erven, A.
    Forschungszentrum Julich, Zent Inst Engn Elektron & Analyt, D-52425 Julich, Germany.
    Erven, W.
    Forschungszentrum Julich, Zent Inst Engn Elektron & Analyt, D-52425 Julich, Germany.
    Eyrich, W.
    Friedrich Alexander Univ Erlangen Nurnberg, Phys Inst, Erwin Rommel Str 1, D-91058 Erlangen, Germany.
    Fedorets, P.
    Forschungszentrum Julich, Inst Kernphys, D-52425 Julich, Germany;Natl Res Ctr Kurchatov Inst, Inst Theoret & Expt Phys, 25 Bolshaya Cheremushkinskaya Ulitsa, Moscow 117218, Russia.
    Foehl, K.
    Justus Liebig Univ Giessen, Phys Inst 2, Heinrich Buff Ring 16, D-35392 Giessen, Germany.
    Fransson, Kjell
    Uppsala University, Disciplinary Domain of Science and Technology, Physics, Department of Physics and Astronomy, Nuclear Physics.
    Goldenbaum, F.
    Forschungszentrum Julich, Inst Kernphys, D-52425 Julich, Germany.
    Goswami, A.
    Forschungszentrum Julich, Inst Kernphys, D-52425 Julich, Germany;Indian Inst Technol Indore, Discipline Phys, Khandwa Rd, Indore 453552, Madhya Pradesh, India.
    Grigoryev, K.
    Forschungszentrum Julich, Inst Kernphys, D-52425 Julich, Germany;Natl Res Ctr Kurchatov Inst, Petersburg Nucl Phys Inst, High Energy Phys Div, 1 Mikrorajon Orlova Roshcha, Gatchina 188300, Leningradskaya, Russia.
    Heijkenskjöld, Lena
    Uppsala University, Disciplinary Domain of Science and Technology, Physics, Department of Physics and Astronomy, Nuclear Physics. Johannes Gutenberg Univ Mainz, Inst Kernphys, Johann Joachim Becher Weg 45, D-55128 Mainz, Germany.
    Hejny, V.
    Forschungszentrum Julich, Inst Kernphys, D-52425 Julich, Germany.
    Huesken, N.
    Westfalische Wilhelms Univ Munster, Inst Kernphys, Wilhelm Klemm Str 9, D-48149 Munster, Germany.
    Jarczyk, L.
    Jagiellonian Univ, Inst Phys, Ulica Prof Stanislawa Lojasiewicza 11, PL-30348 Krakow, Poland.
    Johansson, Tord
    Uppsala University, Disciplinary Domain of Science and Technology, Physics, Department of Physics and Astronomy, Nuclear Physics.
    Kamys, B.
    Jagiellonian Univ, Inst Phys, Ulica Prof Stanislawa Lojasiewicza 11, PL-30348 Krakow, Poland.
    Kemmerling, G.
    Forschungszentrum Julich, Julich Ctr Neutron Sci, D-52425 Julich, Germany;Forschungszentrum Julich, Zent Inst Engn Elektron & Analyt, D-52425 Julich, Germany.
    Khoukaz, A.
    Westfalische Wilhelms Univ Munster, Inst Kernphys, Wilhelm Klemm Str 9, D-48149 Munster, Germany.
    Khreptak, O.
    Jagiellonian Univ, Inst Phys, Ulica Prof Stanislawa Lojasiewicza 11, PL-30348 Krakow, Poland.
    Kirillov, D. A.
    Joint Inst Nucl Phys, Veksler & Baldin Lab High Energiy Phys, 6 Joliot Curie, Dubna 141980, Russia.
    Kistryn, S.
    Jagiellonian Univ, Inst Phys, Ulica Prof Stanislawa Lojasiewicza 11, PL-30348 Krakow, Poland.
    Kleines, H.
    Forschungszentrum Julich, Zent Inst Engn Elektron & Analyt, D-52425 Julich, Germany.
    Klos, B.
    Univ Silesia, August Chelkowski Inst Phys, Ulica 75 Pulku Piechoty 1, PL-41500 Chorzow, Poland.
    Krzemien, W.
    Natl Ctr Nucl Res, Div High Energy Phys, Ulica Hoza 69, PL-00681 Warsaw, Poland.
    Kulessa, P.
    Polish Acad Sci, Henryk Niewodniczanski Inst Nucl Phys, Ulica Radzikowskiego 152, PL-31342 Krakow, Poland.
    Kupsc, Andrzej
    Uppsala University, Disciplinary Domain of Science and Technology, Physics, Department of Physics and Astronomy, Nuclear Physics. Natl Ctr Nucl Res, Div High Energy Phys, Ulica Hoza 69, PL-00681 Warsaw, Poland.
    Lalwani, K.
    Malaviya Natl Inst Technol Jaipur, Dept Phys, JLN Marg, Jaipur 302017, Rajasthan, India.
    Lersch, D.
    Forschungszentrum Julich, Inst Kernphys, D-52425 Julich, Germany;Florida State Univ, Dept Phys, 77 Chieftan Way, Tallahassee, FL 32306 USA.
    Lorentz, B.
    Forschungszentrum Julich, Inst Kernphys, D-52425 Julich, Germany.
    Magiera, A.
    Jagiellonian Univ, Inst Phys, Ulica Prof Stanislawa Lojasiewicza 11, PL-30348 Krakow, Poland.
    Maier, R.
    Forschungszentrum Julich, JARA FAME, Julich Aachen Res Alliance, D-52425 Julich, Germany;Forschungszentrum Julich, Inst Kernphys, D-52425 Julich, Germany;Rhein Westfal TH Aachen, D-52056 Aachen, Germany.
    Marciniewski, Pawel
    Uppsala University, Disciplinary Domain of Science and Technology, Physics, Department of Physics and Astronomy, Nuclear Physics.
    Marianski, B.
    Natl Ctr Nucl Res, Div Nucl Phys, Ulica Hoza 69, PL-00681 Warsaw, Poland.
    Morsch, H. P.
    Natl Ctr Nucl Res, Div Nucl Phys, Ulica Hoza 69, PL-00681 Warsaw, Poland.
    Moskal, P.
    Jagiellonian Univ, Inst Phys, Ulica Prof Stanislawa Lojasiewicza 11, PL-30348 Krakow, Poland.
    Ohm, H.
    Forschungszentrum Julich, Inst Kernphys, D-52425 Julich, Germany.
    Parol, W.
    Polish Acad Sci, Henryk Niewodniczanski Inst Nucl Phys, Ulica Radzikowskiego 152, PL-31342 Krakow, Poland.
    del Rio, E. Perez
    Ist Nazl Fis Nucl, Lab Nazl Frascati, Via Enrico Fermi 40, I-00044 Rome, Italy;Eberhard Karls Univ Tubingen, Phys Inst, Morgenstelle 14, D-72076 Tubingen, Germany;Univ Tubingen, Phys Inst, Kepler Ctr Astro & Particle Phys, Morgenstelle 14, D-72076 Tubingen, Germany.
    Piskunov, N. M.
    Joint Inst Nucl Phys, Veksler & Baldin Lab High Energiy Phys, 6 Joliot Curie, Dubna 141980, Russia.
    Prasuhn, D.
    Forschungszentrum Julich, Inst Kernphys, D-52425 Julich, Germany.
    Pszczel, Damian
    Uppsala University, Disciplinary Domain of Science and Technology, Physics, Department of Physics and Astronomy, Nuclear Physics. Natl Ctr Nucl Res, Div High Energy Phys, Ulica Hoza 69, PL-00681 Warsaw, Poland.
    Pysz, K.
    Polish Acad Sci, Henryk Niewodniczanski Inst Nucl Phys, Ulica Radzikowskiego 152, PL-31342 Krakow, Poland.
    Ritman, J.
    Forschungszentrum Julich, JARA FAME, Julich Aachen Res Alliance, D-52425 Julich, Germany;Forschungszentrum Julich, Inst Kernphys, D-52425 Julich, Germany;Rhein Westfal TH Aachen, D-52056 Aachen, Germany;Ruhr Univ Bochum, Inst Expt Phys 1, Univ Str 150, D-44780 Bochum, Germany.
    Roy, A.
    Indian Inst Technol Indore, Discipline Phys, Khandwa Rd, Indore 453552, Madhya Pradesh, India.
    Rudy, Z.
    Jagiellonian Univ, Inst Phys, Ulica Prof Stanislawa Lojasiewicza 11, PL-30348 Krakow, Poland.
    Rundel, O.
    Jagiellonian Univ, Inst Phys, Ulica Prof Stanislawa Lojasiewicza 11, PL-30348 Krakow, Poland.
    Sawant, S.
    Indian Inst Technol, Dept Phys, Bombay 400076, Maharashtra, India.
    Schadmand, S.
    Forschungszentrum Julich, Inst Kernphys, D-52425 Julich, Germany.
    Schatti-Ozerianska, I.
    Jagiellonian Univ, Inst Phys, Ulica Prof Stanislawa Lojasiewicza 11, PL-30348 Krakow, Poland.
    Sefzick, T.
    Forschungszentrum Julich, Inst Kernphys, D-52425 Julich, Germany.
    Serdyuk, V.
    Forschungszentrum Julich, Inst Kernphys, D-52425 Julich, Germany.
    Shwartz, B.
    Novosibirsk State Univ, 2 Pirogova Ulitsa, Novosibirsk 630090, Russia;Budker Inst Nucl Phys SB RAS, 11 Akad Lavrentieva Prospekt, Novosibirsk 630090, Russia.
    Skorodko, T.
    Tomsk State Univ, Dept Phys, 36 Lenin Ave, Tomsk 634050, Russia;Eberhard Karls Univ Tubingen, Phys Inst, Morgenstelle 14, D-72076 Tubingen, Germany;Univ Tubingen, Phys Inst, Kepler Ctr Astro & Particle Phys, Morgenstelle 14, D-72076 Tubingen, Germany.
    Skurzok, M.
    Jagiellonian Univ, Inst Phys, Ulica Prof Stanislawa Lojasiewicza 11, PL-30348 Krakow, Poland.
    Smyrski, J.
    Jagiellonian Univ, Inst Phys, Ulica Prof Stanislawa Lojasiewicza 11, PL-30348 Krakow, Poland.
    Sopov, V.
    Natl Res Ctr Kurchatov Inst, Inst Theoret & Expt Phys, 25 Bolshaya Cheremushkinskaya Ulitsa, Moscow 117218, Russia.
    Stassen, R.
    Forschungszentrum Julich, Inst Kernphys, D-52425 Julich, Germany.
    Stepaniak, J.
    Natl Ctr Nucl Res, Div High Energy Phys, Ulica Hoza 69, PL-00681 Warsaw, Poland.
    Stephan, E.
    Univ Silesia, August Chelkowski Inst Phys, Ulica 75 Pulku Piechoty 1, PL-41500 Chorzow, Poland.
    Sterzenbach, G.
    Forschungszentrum Julich, Inst Kernphys, D-52425 Julich, Germany.
    Stockhorst, H.
    Forschungszentrum Julich, Inst Kernphys, D-52425 Julich, Germany.
    Stroeher, H.
    Forschungszentrum Julich, JARA FAME, Julich Aachen Res Alliance, D-52425 Julich, Germany;Forschungszentrum Julich, Inst Kernphys, D-52425 Julich, Germany;Rhein Westfal TH Aachen, D-52056 Aachen, Germany.
    Szczurek, A.
    Polish Acad Sci, Henryk Niewodniczanski Inst Nucl Phys, Ulica Radzikowskiego 152, PL-31342 Krakow, Poland.
    Trzcinski, A.
    Natl Ctr Nucl Res, Div Nucl Phys, Ulica Hoza 69, PL-00681 Warsaw, Poland.
    Wolke, Magnus
    Uppsala University, Disciplinary Domain of Science and Technology, Physics, Department of Physics and Astronomy, Nuclear Physics.
    Wronska, A.
    Jagiellonian Univ, Inst Phys, Ulica Prof Stanislawa Lojasiewicza 11, PL-30348 Krakow, Poland.
    Wuestner, P.
    Forschungszentrum Julich, Zent Inst Engn Elektron & Analyt, D-52425 Julich, Germany.
    Yamamoto, A.
    High Energy Accelerator Res Org KEK, Tsukuba, Ibaraki 3050801, Japan.
    Zabierowski, J.
    Natl Ctr Nucl Res, Astrophys Div, Box 447, PL-90950 Lodz, Poland.
    Zielinski, M. J.
    Jagiellonian Univ, Inst Phys, Ulica Prof Stanislawa Lojasiewicza 11, PL-30348 Krakow, Poland.
    Zlomanczuk, Jozef
    Uppsala University, Disciplinary Domain of Science and Technology, Physics, Department of Physics and Astronomy, Nuclear Physics.
    Zupranski, P.
    Natl Ctr Nucl Res, Div Nucl Phys, Ulica Hoza 69, PL-00681 Warsaw, Poland.
    Zurek, M.
    Forschungszentrum Julich, Inst Kernphys, D-52425 Julich, Germany.
    Isotensor Dibaryon in the pp -> pp pi(+)pi(-) Reaction?2018In: Physical Review Letters, ISSN 0031-9007, E-ISSN 1079-7114, Vol. 121, no 5, article id 052001Article in journal (Refereed)
    Abstract [en]

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

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

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

  • 46.
    Adlarson, Patrik
    et al.
    Uppsala University, Disciplinary Domain of Science and Technology, Physics, Department of Physics and Astronomy, Nuclear Physics.
    Collaboration, WASA-at-COSY
    Augustyniak, W.
    Natl Ctr Nucl Res, Dept Nucl Phys, Ul Hoza 69, PL-00681 Warsaw, Poland.
    Bardan, W.
    Jagiellonian Univ, Inst Phys, Prof Stanislawa Lojasiewicza 11, PL-30348 Krakow, Poland.
    Bashkanov, M.
    Univ Edinburgh, Sch Phys & Astron, James Clerk Maxwell Bldg,Peter Guthrie Tait Rd, Edinburgh EH9 3FD, Scotland.
    Bergmann, F. S.
    Westfalische Wilhelms Univ Munster, Inst Kernphys, Wilhelm Klemm Str 9, D-48149 Munster, Germany.
    Berlowski, M.
    Natl Ctr Nucl Res, High Energy Phys Dept, Ul Hoza 69, PL-00681 Warsaw, Poland.
    Bondar, A.
    RAS, SB, Budker Inst Nucl Phys, 11 Akad Lavrentieva Prospect, Novosibirsk 630090, Russia;Novosibirsk State Univ, 2 Pirogova Str, Novosibirsk 630090, Russia.
    Buescher, M.
    Forschungszentrum Julich, Elekt Eigenschaften PGI 6, Peter Grunberg Inst, D-52425 Julich, Germany;Heinrich Heine Univ Dusseldorf, Inst Laser & Plasmaphys, Univ Str 1, D-40225 Dusseldorf, Germany.
    Calén, Hans
    Uppsala University, Disciplinary Domain of Science and Technology, Physics, Department of Physics and Astronomy, Nuclear Physics.
    Ciepal, I.
    Polish Acad Sci, Henryk Niewodniczariski Inst Nucl Phys, PL-31342 Krakow, Poland.
    Clement, H.
    Eberhard Karls Univ Tubingen, Phys Inst, Morgenstelle 14, D-72076 Tubingen, Germany;Univ Tubingen, Phys Inst, Kepler Ctr Astro & Teilchenphys, Morgenstelle 14, D-72076 Tubingen, Germany.
    Czerwinski, E.
    Jagiellonian Univ, Inst Phys, Prof Stanislawa Lojasiewicza 11, PL-30348 Krakow, Poland.
    Demmich, K.
    Westfalische Wilhelms Univ Munster, Inst Kernphys, Wilhelm Klemm Str 9, D-48149 Munster, Germany.
    Engels, R.
    Forschungszentrum Julich, Inst Kernphys, D-52425 Julich, Germany.
    Erven, A.
    Forschungszentrum Julich, Zentralinst Engn Elekt & Anal, D-52425 Julich, Germany.
    Erven, W.
    Forschungszentrum Julich, Zentralinst Engn Elekt & Anal, D-52425 Julich, Germany.
    Eyrich, W.
    Friedrich Alexander Univ Erlangen Nurnberg, Phys Inst, Erwin Rommel Str 1, D-91058 Erlangen, Germany.
    Fedorets, R.
    Forschungszentrum Julich, Inst Kernphys, D-52425 Julich, Germany;Kurchatov Inst, Natl Res Ctr, Inst Theoret & Expt Phys, 25 Bolshaya Cheremushkinskaya, Moscow 117218, Russia.
    Foehl, K.
    Justus Liebig Univ Giessen, Phys Inst 2, Heinrich Buff Ring 16, D-35392 Giessen, Germany.
    Fransson, Kjell
    Uppsala University, Disciplinary Domain of Science and Technology, Physics, Department of Physics and Astronomy, Nuclear Physics.
    Goldenbaum, F.
    Forschungszentrum Julich, Inst Kernphys, D-52425 Julich, Germany.
    Goswami, A.
    Forschungszentrum Julich, Inst Kernphys, D-52425 Julich, Germany;Indian Inst Technol Indore, Dept Phys, Khandwa Rd, Indore 453552, Madhya Pradesh, India.
    Grigoryev, K.
    Forschungszentrum Julich, Inst Kernphys, D-52425 Julich, Germany;Kurchatov Inst, Natl Res Ctr, Petersburg Nucl Phys Inst, High Energy Phys Div, 1 Mkr Orlova Roshcha, Gatchina 188300, Leningradskaya, Russia.
    Gullström, Carl-Oskar
    Uppsala University, Disciplinary Domain of Science and Technology, Physics, Department of Physics and Astronomy, Nuclear Physics.
    Heijkenskjöld, Lena
    Uppsala University, Disciplinary Domain of Science and Technology, Physics, Department of Physics and Astronomy, Nuclear Physics. Johannes Gutenberg Univ Mainz, Inst Kernphys, Johann Joachim Becher Weg 45, D-55128 Mainz, Germany.
    Hejny, V.
    Forschungszentrum Julich, Inst Kernphys, D-52425 Julich, Germany.
    Huesken, N.
    Westfalische Wilhelms Univ Munster, Inst Kernphys, Wilhelm Klemm Str 9, D-48149 Munster, Germany.
    Jarczyk, L.
    Jagiellonian Univ, Inst Phys, Prof Stanislawa Lojasiewicza 11, PL-30348 Krakow, Poland.
    Johansson, Tord
    Uppsala University, Disciplinary Domain of Science and Technology, Physics, Department of Physics and Astronomy, Nuclear Physics.
    Kamys, B.
    Jagiellonian Univ, Inst Phys, Prof Stanislawa Lojasiewicza 11, PL-30348 Krakow, Poland.
    Kemmerling, G.
    Forschungszentrum Julich, Zentralinst Engn Elekt & Anal, D-52425 Julich, Germany;Forschungszentrum Julich, JCNS, D-52425 Julich, Germany.
    Khatri, G.
    Jagiellonian Univ, Inst Phys, Prof Stanislawa Lojasiewicza 11, PL-30348 Krakow, Poland;Harvard Univ, Dept Phys, 17 Oxford St, Cambridge, MA 02138 USA.
    Khoukaz, A.
    Westfalische Wilhelms Univ Munster, Inst Kernphys, Wilhelm Klemm Str 9, D-48149 Munster, Germany.
    Khreptak, A.
    Jagiellonian Univ, Inst Phys, Prof Stanislawa Lojasiewicza 11, PL-30348 Krakow, Poland.
    Kirillov, D. A.
    Joint Inst Nucl Phys, Veksler & Baldin Lab High Energy Phys, 6 Joliot Curie, Dubna 141980, Russia.
    Kistryn, S.
    Jagiellonian Univ, Inst Phys, Prof Stanislawa Lojasiewicza 11, PL-30348 Krakow, Poland.
    Kleines, H.
    Forschungszentrum Julich, Zentralinst Engn Elekt & Anal, D-52425 Julich, Germany;Forschungszentrum Julich, JCNS, D-52425 Julich, Germany.
    Klos, B.
    Univ Silesia, August Chelkowski Inst Phys, Uniwersytecka 4, PL-40007 Katowice, Poland.
    Krzemien, W.
    Natl Ctr Nucl Res, High Energy Phys Dept, Ul Hoza 69, PL-00681 Warsaw, Poland.
    Kulessa, R.
    Polish Acad Sci, Henryk Niewodniczariski Inst Nucl Phys, PL-31342 Krakow, Poland.
    Kupsc, Andrzej
    Uppsala University, Disciplinary Domain of Science and Technology, Physics, Department of Physics and Astronomy, Nuclear Physics. Natl Ctr Nucl Res, High Energy Phys Dept, Ul Hoza 69, PL-00681 Warsaw, Poland.
    Kuzmin, A.
    RAS, SB, Budker Inst Nucl Phys, 11 Akad Lavrentieva Prospect, Novosibirsk 630090, Russia;Novosibirsk State Univ, 2 Pirogova Str, Novosibirsk 630090, Russia.
    Lalwani, K.
    Malaviya Natl Inst Technol Jaipur, Dept Phys, Jln Marg Jaipur 302017, Rajasthan, India.
    Lersch, D.
    Forschungszentrum Julich, Inst Kernphys, D-52425 Julich, Germany.
    Lorentz, B.
    Forschungszentrum Julich, Inst Kernphys, D-52425 Julich, Germany.
    Magiera, A.
    Jagiellonian Univ, Inst Phys, Prof Stanislawa Lojasiewicza 11, PL-30348 Krakow, Poland.
    Maier, R.
    Forschungszentrum Julich, Inst Kernphys, D-52425 Julich, Germany;Forschungszentrum Julich, JARA, FAME, D-52425 Julich, Germany;Rhein Westfal TH Aachen, D-52056 Aachen, Germany.
    Marciniewski, Pawel
    Uppsala University, Disciplinary Domain of Science and Technology, Physics, Department of Physics and Astronomy, Nuclear Physics.
    Marianski, B.
    Natl Ctr Nucl Res, Dept Nucl Phys, Ul Hoza 69, PL-00681 Warsaw, Poland.
    Morsch, H. -P
    Natl Ctr Nucl Res, Dept Nucl Phys, Ul Hoza 69, PL-00681 Warsaw, Poland.
    Moskal, R.
    Jagiellonian Univ, Inst Phys, Prof Stanislawa Lojasiewicza 11, PL-30348 Krakow, Poland.
    Ohm, H.
    Forschungszentrum Julich, Inst Kernphys, D-52425 Julich, Germany.
    Parol, W.
    Polish Acad Sci, Henryk Niewodniczariski Inst Nucl Phys, PL-31342 Krakow, Poland.
    del Rio, E. Perez
    Eberhard Karls Univ Tubingen, Phys Inst, Morgenstelle 14, D-72076 Tubingen, Germany;Univ Tubingen, Phys Inst, Kepler Ctr Astro & Teilchenphys, Morgenstelle 14, D-72076 Tubingen, Germany;INFN, Lab Nazl Frascati, Via E Fermi 40, I-00044 Rome, Italy.
    Piskunov, N. M.
    Joint Inst Nucl Phys, Veksler & Baldin Lab High Energy Phys, 6 Joliot Curie, Dubna 141980, Russia.
    Prasuhn, D.
    Forschungszentrum Julich, Inst Kernphys, D-52425 Julich, Germany.
    Pszczel, Damian
    Uppsala University, Disciplinary Domain of Science and Technology, Physics, Department of Physics and Astronomy, Nuclear Physics. Natl Ctr Nucl Res, High Energy Phys Dept, Ul Hoza 69, PL-00681 Warsaw, Poland.
    Pysz, K.
    Polish Acad Sci, Henryk Niewodniczariski Inst Nucl Phys, PL-31342 Krakow, Poland.
    Pyszniak, Andzej
    Uppsala University, Disciplinary Domain of Science and Technology, Physics, Department of Physics and Astronomy, Nuclear Physics. Jagiellonian Univ, Inst Phys, Prof Stanislawa Lojasiewicza 11, PL-30348 Krakow, Poland.
    Ritman, J.
    Forschungszentrum Julich, Inst Kernphys, D-52425 Julich, Germany;Forschungszentrum Julich, JARA, FAME, D-52425 Julich, Germany;Rhein Westfal TH Aachen, D-52056 Aachen, Germany;Ruhr Univ Bochum, Inst Expt Phys 1, Univ Str 150, D-44780 Bochum, Germany.
    Roy, A.
    Indian Inst Technol Indore, Dept Phys, Khandwa Rd, Indore 453552, Madhya Pradesh, India.
    Rudy, Z.
    Jagiellonian Univ, Inst Phys, Prof Stanislawa Lojasiewicza 11, PL-30348 Krakow, Poland.
    Rundel, O.
    Jagiellonian Univ, Inst Phys, Prof Stanislawa Lojasiewicza 11, PL-30348 Krakow, Poland.
    Sawant, S.
    Indian Inst Technol, Dept Phys, Bombay 400076, Maharashtra, India.
    Schadmand, S.
    Forschungszentrum Julich, Inst Kernphys, D-52425 Julich, Germany.
    Schatti-Ozerianska, I.
    Jagiellonian Univ, Inst Phys, Prof Stanislawa Lojasiewicza 11, PL-30348 Krakow, Poland.
    Sefzick, T.
    Forschungszentrum Julich, Inst Kernphys, D-52425 Julich, Germany.
    Serdyuk, V.
    Forschungszentrum Julich, Inst Kernphys, D-52425 Julich, Germany.
    Shwartz, B.
    RAS, SB, Budker Inst Nucl Phys, 11 Akad Lavrentieva Prospect, Novosibirsk 630090, Russia;Novosibirsk State Univ, 2 Pirogova Str, Novosibirsk 630090, Russia.
    Sitterberg, K.
    Westfalische Wilhelms Univ Munster, Inst Kernphys, Wilhelm Klemm Str 9, D-48149 Munster, Germany.
    Skorodko, T.
    Eberhard Karls Univ Tubingen, Phys Inst, Morgenstelle 14, D-72076 Tubingen, Germany;Univ Tubingen, Phys Inst, Kepler Ctr Astro & Teilchenphys, Morgenstelle 14, D-72076 Tubingen, Germany;Tomsk State Univ, Dept Phys, 36 Lenina Ave, Tomsk 634050, Russia.
    Skurzok, M.
    Jagiellonian Univ, Inst Phys, Prof Stanislawa Lojasiewicza 11, PL-30348 Krakow, Poland.
    Smyrski, J.
    Jagiellonian Univ, Inst Phys, Prof Stanislawa Lojasiewicza 11, PL-30348 Krakow, Poland.
    Sopov, V.
    Kurchatov Inst, Natl Res Ctr, Inst Theoret & Expt Phys, 25 Bolshaya Cheremushkinskaya, Moscow 117218, Russia.
    Stassen, R.
    Forschungszentrum Julich, Inst Kernphys, D-52425 Julich, Germany.
    Stepaniak, J.
    Natl Ctr Nucl Res, High Energy Phys Dept, Ul Hoza 69, PL-00681 Warsaw, Poland.
    Stephan, E.
    Univ Silesia, August Chelkowski Inst Phys, Uniwersytecka 4, PL-40007 Katowice, Poland.
    Sterzenbach, G.
    Forschungszentrum Julich, Inst Kernphys, D-52425 Julich, Germany.
    Stockhorst, H.
    Forschungszentrum Julich, Inst Kernphys, D-52425 Julich, Germany.
    Stroeher, H.
    Forschungszentrum Julich, Inst Kernphys, D-52425 Julich, Germany;Forschungszentrum Julich, JARA, FAME, D-52425 Julich, Germany;Rhein Westfal TH Aachen, D-52056 Aachen, Germany.
    Szczurek, A.
    Polish Acad Sci, Henryk Niewodniczariski Inst Nucl Phys, PL-31342 Krakow, Poland.
    Trzcinski, A.
    Natl Ctr Nucl Res, Dept Nucl Phys, Ul Hoza 69, PL-00681 Warsaw, Poland.
    Wolke, Magnus
    Uppsala University, Disciplinary Domain of Science and Technology, Physics, Department of Physics and Astronomy, Nuclear Physics.
    Wronska, A.
    Jagiellonian Univ, Inst Phys, Prof Stanislawa Lojasiewicza 11, PL-30348 Krakow, Poland.
    Wuestner, R.
    Forschungszentrum Julich, Zentralinst Engn Elekt & Anal, D-52425 Julich, Germany.
    Yamamoto, A.
    High Energy Accelerator Org, KEK, Tsukuba, Ibaraki 3050801, Japan.
    Zabierowski, J.
    Natl Ctr Nucl Res, Astrophys Div, Box 447, PL-90950 Lodz, Poland.
    Zielinski, M. J.
    Jagiellonian Univ, Inst Phys, Prof Stanislawa Lojasiewicza 11, PL-30348 Krakow, Poland.
    Zlomanczuk, Jozef
    Uppsala University, Disciplinary Domain of Science and Technology, Physics, Department of Physics and Astronomy, Nuclear Physics.
    Zupranski, R.
    Natl Ctr Nucl Res, Dept Nucl Phys, Ul Hoza 69, PL-00681 Warsaw, Poland.
    Zurek, M.
    Forschungszentrum Julich, Inst Kernphys, D-52425 Julich, Germany.
    Wirzba, A.
    Forschungszentrum Julich, Inst Kernphys, D-52425 Julich, Germany;Forschungszentrum Julich, Inst Adv Simulat, D-52425 Julich, Germany;Forschungszentrum Julich, Julich Ctr Hadron Phys, D-52425 Julich, Germany.
    Search for C violation in the decay eta -> pi(0)e(+)e(-) with WASA-at-COSY2018In: Physics Letters B, ISSN 0370-2693, E-ISSN 1873-2445, Vol. 784, p. 378-384Article in journal (Refereed)
    Abstract [en]

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

  • 47.
    Adlarson, Patrik
    et al.
    Uppsala University, Disciplinary Domain of Science and Technology, Physics, Department of Physics and Astronomy, Nuclear Physics.
    Li, Cui
    Uppsala University, Disciplinary Domain of Science and Technology, Physics, Department of Physics and Astronomy, Nuclear Physics.
    Lambda hyperon spin polarization and CP tests at BESIII2019In: MESON 2018 - 15th International Workshop on Meson Physics / [ed] Wronska, A Magiera, A Przygoda, W, EDP Sciences, 2019, article id 03009Conference paper (Refereed)
    Abstract [en]

    In these proceedings two preliminary results from the BESIII collaboration on polarized Lambda and (Lambda) over bar are reported. Both results are first observations and concern the resonant and non-resonant processes e(-)e(+) -> J/psi -> Lambda(Lambda) over bar and e(-)e(+) -> gamma* -> Lambda Lambda at root s = 2.396 GeV, respectively. For J/psi -> Lambda Lambda the relative phase between the electric and magnetic form factors, Delta Phi, has for the first time been determined, Delta Phi = 42.4(6)(stat) (5)(stat degrees). That Delta Phi not equal 0 allows for a simultaneous measurement also of the asymmetry decay parameters Lambda -> p pi(-) (alpha_), (Lambda) over bar -> (p) over bar pi(+) (alpha(+)) and (Lambda) over bar -> (n) over bar pi(0) ((alpha) over bar (0)). The measured value of alpha_ = 0.750 +/- 0.009 +/- 0.004 differs by 17(3)% from the PDG value. The simultaneous measurement for the asymmetry parameters allows for the most precise test of CP violation conducted for A decays, A(cp) = - 0.006(12)(stat) (7)(syst). The reaction e(-)e(+) -> Lambda(Lambda) over bar at root s = 2.396 GeV is the first complete measurement of the time-like electric (G(E)) and magnetic (G(M)) form factor of any baryon as also the ratio R = vertical bar(GE)/(G(M))vertical bar and Delta Phi have been determined: R = 0.96(14)(12) and Delta Phi = 37(12)(stat) (6)(stat)degrees. The obtained cross-section and effective form factor are sigma = 119.0(53)(stat)(51)(syst) pb and vertical bar G vertical bar = 0.123 (3)(stat) (3)(syst), respectively.

  • 48.
    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.

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