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2H( 3He, t)2p reaction at 2 GeV

  • B. Ramstein
  • C. Mosbacher
  • T. Hennino
  • W. Augustyniak
  • D. Bachelier
  • H.G. Bohlen
  • J.L. Boyard
  • R. Dahl
  • C. Ellegaard
  • C. Gaarde
  • J. Gosset
  • J.C. Jourdain
  • J.S. Larsen
  • M.C. Lemaire
  • D. L'Hôte
  • H.P. Morsch
  • M. Österlund
  • J. Poitou
  • P. Radvanyi
  • M. Roy-Stephan
  • T. Sams
  • M. Skousen
  • S. Tarlé-Rousteau
  • P. Zupranski

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.

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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Copyright information

© Società Italiana di Fisica and Springer-Verlag 2003

Authors and Affiliations

  • B. Ramstein
    • 1
  • C. Mosbacher
    • 2
  • T. Hennino
    • 1
  • W. Augustyniak
    • 7
  • D. Bachelier
    • 1
  • H.G. Bohlen
    • 3
  • J.L. Boyard
    • 1
  • R. Dahl
    • 4
  • C. Ellegaard
    • 4
  • C. Gaarde
    • 4
  • J. Gosset
    • 5
  • J.C. Jourdain
    • 1
  • J.S. Larsen
    • 4
  • M.C. Lemaire
    • 5
  • D. L'Hôte
    • 5
  • H.P. Morsch
    • 3
  • M. Österlund
    • 6
  • J. Poitou
    • 5
  • P. Radvanyi
    • 3
  • M. Roy-Stephan
    • 1
  • T. Sams
    • 3
  • M. Skousen
    • 4
  • S. Tarlé-Rousteau
    • 1
  • P. Zupranski
    • 1
  1. 1.Institut de Physique Nucléaire, IN2P3(CNRS), 91406 Orsay Cedex, FranceFR
  2. 2.Institut für Kernphysik, Forschungszentrum Jülich GmbH, D-52425, GermanyDE
  3. 3.Laboratoire National Saturne, IN2P3(CNRS) and DSM(CEA), F-91191 Gif-sur-Yvette Cedex, FranceFR
  4. 4.Niels Bohr Institute, University of Copenhagen, DK-2100 Copenhagen, DenmarkDK
  5. 5.DSM/Dapnia, CEA/Saclay, 91191 Gif-sur-Yvette Cedex, FranceFR
  6. 6.Institute of Physics, University of Lund, S-223 62 Lund, SwedenSE
  7. 7.Soltan Institute for Nuclear Studies, 00681 Warsaw, PolandPL

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