Isospin breaking in the pion-nucleon scattering lengths
Martin Hoferichter, Bastian Kubis, Ulf-G. Mei{\ss}ner
TL;DR
This paper investigates how differences in quark masses and virtual photons cause isospin breaking in pion-nucleon scattering lengths across all physical channels using covariant baryon chiral perturbation theory.
Contribution
It provides a comprehensive analysis of isospin breaking effects in pion-nucleon scattering lengths within a covariant chiral perturbation theory framework.
Findings
Quantifies isospin breaking contributions from quark mass differences.
Analyzes virtual photon effects on scattering lengths.
Applies the framework to all physical channels.
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.
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