Validity of the coupled-channel method for the study of Δ excitation in intermediate-energy NN scattering

Phys. Rev. C 32, 1986 – Published 1 December 1985
T.-S. H. Lee and A. Matsuyama


Within the unitary πNN theory with Δ excitation, the effect of πd and πNN production channels on NN elastic scattering is examined. It is shown that the two-body coupled-channel method, which has been widely employed to study the Δ excitation in intermediate-energy NN scattering, is a valid approximation. Our results indicate that the difficulty encountered by the meson-exchange theory in understanding the NN data up to 1 GeV cannot be resolved within the model based on the one-pion-exchange Δ excitation mechanism.


  • Received 22 July 1985
  • Published in the issue dated December 1985

© 1985 The American Physical Society

Authors & Affiliations

T.-S. H. Lee

  • Argonne National Laboratory, Argonne, Illinois 60439

A. Matsuyama

  • Swiss Institute for Nuclear Research, Villigen, Switzerland

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