Local and Nonlocal Potentials for Low Energy Pion-Nucleon Scattering

Local and nonlocal potentials have been evaluated using the reaction matrix approach to the inverse scattering problem for low energy pion-nucleon scattering. The nonlocal potential gave the oorrect position for the Pll ground state nucleon mass, but the local potential did not. Incident pion energies up to 700 MeV were considered.