Chiral properties of light mesons with $N_f=2+1$ overlap fermions

TL;DR

This study updates the light meson spectrum using $N_f=2+1$ overlap fermions across multiple quark masses, employing chiral perturbation theory for extrapolation and verifying results with alternative methods.

Contribution

It provides a refined analysis of the light meson spectrum with $N_f=2+1$ overlap fermions, including chiral extrapolation at NNLO and consistency checks with reduced theories.

Findings

Consistent meson spectrum results across different extrapolation methods.

Validation of chiral perturbation theory predictions at NNLO.

Enhanced understanding of light meson properties with $N_f=2+1$ fermions.

Abstract

We present an update of the light meson spectrum with $N_f$=2+1 overlap fermions on a $16^3\times 48$ lattice at five different up and down quark masses and two strange quark masses. Based on our experience with the previous simulation with $N_f=2$, we carry out the chiral extrapolation with the prediction of the chiral perturbation theory at the next-to-next-to leading order. We also check the consistency of our analysis by using alternative chiral extrapolation with a reduced theory in which the strange quark mass is integrated out.