Quark masses from quenched overlap fermions

TL;DR

This paper calculates light and strange quark masses using quenched overlap fermions with non-perturbative renormalization, testing quenched chiral perturbation theory and observing chiral logs in the hadron spectrum.

Contribution

It provides new quenched lattice QCD results for quark masses with non-perturbative renormalization and evidence supporting quenched chiral perturbation theory.

Findings

Quark masses computed at two gauge couplings

Evidence for chiral logs in the hadron spectrum

Validation of quenched chiral perturbation theory predictions

Abstract

We compute light and strange quark masses for quenched overlap fermions at two values of the gauge coupling. The renormalisation is done non-perturbatively. We test the predictions of quenched chiral perturbation theory for the quark mass dependence of the hadron spectrum and see evidence for the existence of chiral logs.