Meson-exchange {pi}N models in three-dimensional Bethe-Salpeter formulation
Journal Article
·
· Physical Review C
The pion-nucleon scattering is investigated by using several three-dimensional reduction schemes of the Bethe-Salpeter equation for a model Lagrangian involving {pi}, N, {Delta}, {rho}, and {sigma} fields. It is found that all of the resulting meson-exchange models can give similar good descriptions of the {pi}N scattering data up to 400 MeV. However they have significant differences in describing the {pi}NN and {pi}N{Delta} form factors and the {pi}N off-shell t-matrix elements. We point out that these differences can be best distinguished by investigating the near threshold pion production from nucleon-nucleon collisions and pion photoproduction on the nucleon. The consequences of using these models to investigate various pion-nucleus reactions are also discussed.
- Sponsoring Organization:
- (US)
- DOE Contract Number:
- W-31109-ENG-38
- OSTI ID:
- 40277075
- Journal Information:
- Physical Review C, Journal Name: Physical Review C Journal Issue: 3 Vol. 64; ISSN 0556-2813
- Publisher:
- The American Physical Society
- Country of Publication:
- United States
- Language:
- English
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