Proton-proton bremsstrahlung below and above pion threshold: Influence of the Δ isobar

Phys. Rev. C 51, 2334 – Published 1 May 1995
F. de Jong, K. Nakayama, and T.-S. H. Lee


The proton-proton bremsstrahlung is investigated within a coupled-channel model with the Δ degree of freedom. The model is consistent with the NN scattering up to 1 GeV and the γNΔ vertex determined in the study of pion photoproduction reaction. It is found that the Δ excitation can significantly improve the agreements with the ppppγ at Elab=280 MeV. Predictions at Elab=550 and 800 MeV are presented for future experimental tests.


  • Received 9 December 1994
  • Published in the issue dated May 1995

© 1995 The American Physical Society

Authors & Affiliations

F. de Jong, K. Nakayama, and T.-S. H. Lee

  • Department of Physics and Astronomy, University of Georgia, Athens, Georgia 30602
  • Institut für Kernphysik, Forschungszentrum Jülich, D-52428, Germany
  • Kernfysisch Versneller Instituut, 9747 AA Groningen, The Netherlands
  • Physics Division, Argonne National Laboratory, Argonne, Illinois 60439

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