Lowest-lying octet baryon masses in covariant baryon chiral perturbation theory

TL;DR

This paper systematically studies octet baryon masses using covariant baryon chiral perturbation theory up to high order, fitting lattice QCD data and emphasizing the importance of finite-volume corrections for accurate results.

Contribution

It provides a comprehensive analysis of octet baryon masses incorporating virtual decuplet baryons and demonstrates the consistency of lattice QCD results with a self-consistent finite-volume correction approach.

Findings

Achieves good fit to lattice QCD data with $ m{chi}^2/ m{d.o.f.}$ close to 1.

Confirms the consistency among different lattice QCD simulations.

Highlights the importance of finite-volume corrections in baryon mass calculations.

Abstract

We report on a systematic study of the ground-state octet baryon masses in the covariant baryon chiral perturbation theory with the extended-on-mass-shell renormalization scheme up to next-to-next-to-next-to-leading order, taking into account the contributions of the virtual decuplet baryons. A reasonable description of the lattice results is achieved by fitting simultaneously all the publicly available $n_f = 2+1$ lattice QCD data. It confirms that the various lattice simulations are consistent with each other. We stress that a self-consistent treatment of finite-volume corrections is important to obtain a $\chi^2/\rm{d.o.f.}$ about 1.