Pion-nucleon scattering around the delta resonance

Abstract

We develop a generalized version of heavy-baryon chiral perturbation theory to describe pion-nucleon scattering in a kinematic domain that extends continuously from threshold to the delta-isobar peak. The $P$-wave phase shifts are used to illustrate this framework.

Comments: Talk given at Chiral Dynamics 2009, 8 pages and 4 figures