The width of the $\Delta$-resonance at two loop order in baryon chiral perturbation theory

Abstract

We calculate the width of the delta resonance at leading two-loop order in baryon chiral perturbation theory. This gives a correlation between the leading pion-nucleon-delta and pion-delta couplings, which is relevant for the analysis of pion-nucleon scattering and other processes.

Comments: 7 pages, 3 figures