arXiv:0903.3890·v1·High Energy Physics — Phenomenology
Isospin breaking in the pion-nucleon scattering lengths
Martin Hoferichter🇩🇪 · Bastian Kubis🇩🇪 · Ulf-G. Meißner🇩🇪
Abstract
We analyze isospin breaking through quark mass differences and virtual photons in the pion-nucleon scattering lengths in all physical channels in the framework of covariant baryon chiral perturbation theory.
Comments: 7 pages, 1 figure