Axial-vector form factors of the baryon octet and chiral symmetry

TL;DR

This paper investigates the axial-vector form factors of the baryon octet using flavor-SU(3) chiral perturbation theory, including explicit baryon and meson degrees of freedom, and examines the convergence and comparison with lattice QCD data.

Contribution

It provides a consistent chiral perturbation theory framework for axial-vector form factors with explicit degrees of freedom and on-shell masses, analyzing convergence and lattice data comparison.

Findings

Analyzed convergence properties of the chiral expansion.

Explored the use of on-shell masses in loop calculations.

Discussed potential comparisons with lattice QCD results.

Abstract

We consider the axial-vector form factors of the baryon octet in flavor-SU(3) chiral perturbation theory. The baryon octet and decuplet and the pseudoscalar-meson octet are included as explicit degrees of freedom. We explore the use of on-shell meson and baryon masses in the one-loop contributions to the axial-vector form factors and focus on a consistent treatment in terms of chiral power counting. The convergence properties of such an approach are scrutinized. We discuss the potential for comparison to upcoming QCD lattice data.