Pion-nucleon scattering in a Bethe-Salpeter approach

Abstract

A covariant model of elastic pion-nucleon scattering based on the Bethe-Salpeter equation is presented. We obtain a good description of the S- and P-wave phase shifts up to 360 MeV laboratory energy. We also compare results from the K-matrix approach and several 3-dimensional quasipotential equations to the Bethe-Salpeter equation.

Comments: 6 pp, 3 figures, LaTeX, uses menuproc.sty. Invited plenary talk, Ninth International Symposium on Meson-Nucleon Physics and the Structure of the Nucleon, Center for Nuclear Studies, The George Washington University, Washington, D.C., July 26-31, 2001; to appear in the proceedings