Quark mass dependence of the ground-state octet baryons in next-to-next-to-next-to-leading order covariant baryon chiral perturbation theory

TL;DR

This study uses advanced covariant baryon chiral perturbation theory to accurately model ground-state octet baryon masses, fitting lattice QCD data with high precision and revealing detailed quark mass dependencies.

Contribution

It provides a comprehensive analysis of octet baryon masses up to N3LO, fitting multiple lattice QCD datasets with a large set of low-energy constants.

Findings

Successful fit to lattice QCD results from multiple collaborations.

Detailed quark mass dependence of octet baryon masses.

Validation of covariant baryon chiral perturbation theory at high order.

Abstract

We report on a recent study of the ground-state octet baryon masses using the covariant baryon chiral perturbation theory with the extended-on-mass-shell renormalization scheme up to next-to-next-to-next-to-leading order. By adjusting the available 19 low-energy constants, a good fit of the $n_f=2+1$ lattice quantum chromodynamics results from the PACS-CS, LHPC, HSC, QCDSF-UKQCD and NPLQCD collaborations is achieved.