The width of the -resonance at two loop order in baryon chiral perturbation theory
arXiv:1608.00517 · doi:10.1016/j.physletb.2016.10.017
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.
7 pages, 3 figures