A relativistic meson-exchange model of pion-nucleon scattering
- National Taiwan Univ., Taipei (China)
Pion-nucleon scattering is investigated using the Kadshevsky three-dimensional reduction of the Bethe-Salpeter equation. The resulting potential includes the direct and crossed N and {Delta} terms, and the t-channel {sigma}- and {rho}-exchange terms. The nucleon-pole condition is imposed to define the renormalization of the nucleon mass and the {pi}NN coupling constant. A mixture of the scalar and vector {sigma}{pi}{pi} couplings is introduced to simulate the broad width of the s-wave correlated two-pion exchange mechanism. Good descriptions of the {pi}N phase shifts up to 400 MeV have been obtained in all S- and P-waves. The off-shell behavior for our model differs significantly from that obtained using different reductions. A paper describing our results was published.
- Research Organization:
- Argonne National Lab., IL (United States)
- OSTI ID:
- 166431
- Report Number(s):
- ANL--95/14; ON: DE96000985
- Country of Publication:
- United States
- Language:
- English
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