Short range exchange contributions to the cross section for ppppπ0 near threshold

Phys. Rev. Lett. 70, 2237 – Published 12 April 1993
T.-S. H. Lee and D. O. Riska


The nuclear S-wave pion production is described by the axial charge density operator of the two-nucleon systen. It is shown that the short range axial exchange charge operator implied by the nucleon-nucleon interaction enhances the predicted cross section for the reaction ppppπ0 near threshold by factors 3–5. This suffices to explain most of the underprediction obtained with the single-nucleon and S-wave pion rescattering operator. The result implies that the cross section for ppppπ0 can provide direct information on the short range components of the nucleon-nucleon interaction.


  • Received 30 November 1992
  • Published in the issue dated 12 April 1993

© 1993 The American Physical Society

Authors & Affiliations

T.-S. H. Lee and D. O. Riska

  • Physics Division, Argonne National Laboratory, Argonne, Illinois 60439-4843,
  • Department of Physics, University of Helsinki, 00170 Helsinki, Finland

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