Covariant formulation of pion-nucleon scattering
arXiv:nucl-th/9810058
Abstract
A covariant model of elastic pion-nucleon scattering based on the Bethe-Salpeter equation is presented. The kernel consists of s- and u-channel nucleon and delta poles, along with rho and sigma exchange in the t-channel. A good fit is obtained to the s- and p-wave phase shifts up to the two-pion production threshold.
6 pages, RevTeX; 1 figure. Presented at the 16th European Conference on Few-Body Problems in Physics, June 1-6, 1998, Autrans (France); to appear in the conference proceedings