Extended-soft-core NN potentials in momentum space. II. Meson-pair exchange potentials

Th. A. Rijken, H. Polinder, and J. Nagata
Phys. Rev. C 66, 044009 – Published 29 October 2002
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Abstract

The partial wave projection of the Nijmegen soft-core potential model for meson-pair-exchange (MPE) for NN scattering in momentum space is presented. Here, nucleon-nucleon momentum-space MPE potentials are NN interactions where either one or both nucleons contains a meson-pair vertex. Dynamically, the meson-pair vertices can be viewed as describing in an effective way (part of) the effects of heavy-meson exchange and meson-nucleon resonances. From the point of view of “duality,” these two kinds of contribution are roughly equivalent. Part of the MPE vertices can be found in the chiral-invariant phenomenological Lagrangians that have a basis in spontaneous broken chiral symmetry. It is shown that the MPE interactions are a very important component of the nuclear force, which indeed enables a very successful description of the low and medium energy NN data. Here we present a precise fit to the NN data with the extended-soft-core model containing one-boson-exchange, PS-PS-, and MPE potentials. An excellent description of the NN data for TLab<~350MeV is presented and discussed. Phase shifts are given and a χpdp2=1.15 is reached.

  • Received 29 March 2002

DOI:https://doi.org/10.1103/PhysRevC.66.044009

©2002 American Physical Society

Authors & Affiliations

Th. A. Rijken and H. Polinder

  • Institute for Theoretical Physics Nijmegen, University of Nijmegen, Nijmegen, The Netherlands

J. Nagata*

  • Venture Business Laboratory, Hiroshima University, Kagamiyama 2-313, Higashi-Hiroshima, Japan

  • *Present address: Kyushu International University, Fukuoka 805-8512, Japan.

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Issue

Vol. 66, Iss. 4 — October 2002

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