Phys. Rev. C
79,
044002
(2009)
[11 pages]
Production of the ω meson in the pd→3Heω reaction at 1450 MeV and 1360 MeV
K. Schönning et al. CELSIUS/WASA Collaboration
Show All Authors/Affiliations
Hide All Authors/Affiliations
K. Schönning1, Chr. Bargholtz2, M. Bashkanov3, M. Berłowski4, D. Bogoslawsky5, H. Calén1, H. Clement3, L. Demirörs6, C. Ekström7, K. Fransson1, L. Gerén2, L. Gustafsson1, B. Höistad1, G. Ivanov5, M. Jacewicz1, E. Jiganov5, T. Johansson1, S. Keleta1, O. Khakimova3, K. P. Khemchandani8,9, F. Kren3, S. Kullander1, A. Kupść1, A. Kuzmin10, K. Lindberg2, P. Marciniewski1, B. Morosov5, W. Oelert11, C. Pauly6, H. Petrén1, Y. Petukhov5, A. Povtorejko5, R. J. M. Y. Ruber1, W. Scobel6, R. Shafigullin12, B. Shwartz10, T. Skorodko3, V. Sopov13, J. Stepaniak4, P.-E. Tegnér2, P. Thörngren Engblom1, V. Tikhomirov5, A. Turowiecki14, G. J. Wagner3, C. Wilkin15, M. Wolke11, J. Zabierowski4, I. Zartova2, and J. Złomańczuk1 (CELSIUS/WASA Collaboration)
1Department of Physics and Astronomy, Uppsala University, Uppsala, Sweden 2Department of Physics, Stockholm University, Stockholm, Sweden 3Physikalisches Institut der Universität Tübingen, Tübingen, Germany 4Sołtan Institute of Nuclear Studies, Warsaw and Lodz, Poland 5Joint Institute for Nuclear Research, Dubna, Russia 6Institut für Experimentalphysik, Universität Hamburg, Hamburg, Germany 7The Svedberg Laboratory, Uppsala, Sweden 8Departamento de Física Teórica and IFIC, Centro Mixto Universidad de Valencia-CSIC, Institutos de Investigación de Paterna, Aptd. 22085, E-46071 Valencia, Spain 9Centro de Física Computacional, Departamento de Física, Universidade de Coimbra, P-3004-516 Coimbra, Portugal 10Budker Institute of Nuclear Physics, Novosibirsk, Russia 11Institut für Kernphysik, Forschungszentrum Jülich, Germany 12Moscow Engineering Physics Institute, Moscow, Russia 13Institute of Theoretical and Experimental Physics, Moscow, Russia 14Institute of Experimental Physics, Warsaw, Poland 15Physics and Astronomy Department, UCL, London, United Kingdom
Received 5 February 2009; published 28 April 2009
The production of ω mesons in the pd→3Heω reaction has been studied at two energies near the kinematic threshold, Tp=1450 MeV and Tp=1360 MeV. The differential cross section was measured as a function of the ω c.m. angle at both energies over the whole angular range. Whereas the results at 1360 MeV are consistent with isotropy, strong rises are observed near both the forward and backward directions at 1450 MeV. Calculations made using a two-step model with an intermediate pion fail to reproduce the shapes of the measured angular distributions and also underestimate the total cross sections.
© 2009 The American Physical Society
URL:
http://link.aps.org/doi/10.1103/PhysRevC.79.044002
DOI:
10.1103/PhysRevC.79.044002
|
|