Masses and magnetic moments of ground-state baryons in covariant baryon chiral perturbation theory

TL;DR

This paper explores how covariant baryon chiral perturbation theory (ChPT) improves understanding of light-quark mass effects and SU(3) flavor symmetry breaking on ground-state baryon magnetic moments, showing promising features over other formulations.

Contribution

It demonstrates the advantages of the covariant EOMS formulation of baryon ChPT in analyzing baryon magnetic moments and symmetry breaking effects.

Findings

Covariant ChPT shows improved convergence over heavy-baryon approaches.

The EOMS formulation effectively captures SU(3) flavor symmetry breaking.

Results suggest better agreement with experimental data.

Abstract

We report on some recent developments in our understanding of the light-quark mass dependence and the SU(3) flavor symmetry breaking corrections to the magnetic moments of the ground-state baryons in a covariant formulation of baryon chiral perturbation theory, the so-called EOMS formulation. We show that this covariant ChPT exhibits some promising features compared to its heavy-baryon and infrared counterparts.