2H( 3He, t)2p reaction at 2 GeV |
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| Authors: | B Ramstein C Mosbacher T Hennino W Augustyniak D Bachelier HG Bohlen JL Boyard R Dahl C Ellegaard C Gaarde J Gosset JC Jourdain JS Larsen MC Lemaire D L'Hôte HP Morsch M Österlund J Poitou P Radvanyi M Roy-Stephan T Sams M Skousen S Tarlé-Rousteau P Zupranski |
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| Institution: | (1) Institut de Physique Nucléaire, IN2P3(CNRS), 91406 Orsay Cedex, France, FR;(2) Institut für Kernphysik, Forschungszentrum Jülich GmbH, D-52425, Germany, DE;(3) Laboratoire National Saturne, IN2P3(CNRS) and DSM(CEA), F-91191 Gif-sur-Yvette Cedex, France, FR;(4) Niels Bohr Institute, University of Copenhagen, DK-2100 Copenhagen, Denmark, DK;(5) DSM/Dapnia, CEA/Saclay, 91191 Gif-sur-Yvette Cedex, France, FR;(6) Institute of Physics, University of Lund, S-223 62 Lund, Sweden, SE;(7) Soltan Institute for Nuclear Studies, 00681 Warsaw, Poland, PL |
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| Abstract: | The exclusive 2H( 3He, t)2p reaction has been studied at 2 GeV for energy transfers up to 500 MeV and triton angles up to 3.4°. The protons were measured in the large acceptance magnetic detector DIOGENE, in coincidence with the forward tritons detected
in a dedicated magnetic arm. The energy transfer spectra extend well above the pion threshold. However, in the region of Δ
excitation, the yield is less than 10% of the inclusive 2H( 3He, t) cross-section, which indicates the small contribution of the ΔN ↦ NN process. The angular distributions of the two
protons in their center of mass have been analysed as a function of energy transfer and triton angle and a Legendre polynomial
decomposition has been achieved. These data have been compared to a model based on a coupled-channel approach for describing
the NN and NΔ systems.
Received: 21 October 2002 / Accepted: 15 November 2002 / Published online: 11 March 2003
RID="a"
ID="a"e-mail: ramstein@ipno.in2p3.fr
RID="†"
ID="†"Deceased.
RID="†"
ID="†"Deceased.
RID="d"
ID="d"Present adress: School of Engineering, J?nk?ping University, P.O. Box 1026, S-551 11 J?nk?ping, Sweden.
Communicated by M. Gar?on |
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| Keywords: | PACS 25 55 Kr Charge-exchange reactions – 14 20 Gk Baryon resonances with S = 0 – 24 10 Eq Coupled-channel and distorted-wave models |
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