Incorporating Chiral Symmetry in Extrapolations of Octet Baryon Magnetic Moments

TL;DR

This paper develops methods for extrapolating lattice QCD results of octet baryon magnetic moments to physical conditions, ensuring consistency with chiral symmetry and heavy quark theory, and compares these with experimental data.

Contribution

It introduces a novel extrapolation approach that incorporates chiral symmetry constraints into lattice calculations of baryon magnetic moments.

Findings

Successful extrapolation of nucleon and Sigma baryon magnetic moments.

Residual discrepancies in Xi baryon moments highlight need for more realistic strange quark mass data.

Extrapolation methods improve agreement with experimental measurements.

Abstract

We explore methods of extrapolating lattice calculations of hadronic observables to the physical regime, while respecting the constraints of chiral symmetry and heavy quark effective theory. In particular, we extrapolate lattice results for magnetic moments of the spin-1/2 baryon octet to the physical pion mass and compare with experimental measurements. The success previously reported for extrapolations of the nucleon magnetic moments carries over to the Sigma baryons. A study of the residual discrepancies in the Xi baryon moments suggests that it is important to have new simulation data with a more realistic strange quark mass.