Quark spectra and light hadron phenomenology from overlap fermions with improved gauge field action

TL;DR

This paper reports on a simulation study of quenched overlap fermions with an improved gauge action, analyzing spectral properties, chiral condensate, topological charge, and hadron masses to connect lattice results with continuum physics.

Contribution

It introduces first results from simulations using overlap fermions with an improved gauge field action, focusing on spectral and phenomenological quantities.

Findings

Spectral properties of the overlap operator analyzed

Chiral condensate and topological charge measured

Quark and hadron masses computed

Abstract

We present first results from a simulation of quenched overlap fermions with improved gauge field action. Among the quantities we study are the spectral properties of the overlap operator, the chiral condensate and topological charge, quark and hadron masses, and selected nucleon matrix elements. To make contact with continuum physics, we compute the renormalization constants of quark bilinear operators in perturbation theory and beyond.