Nucleon axial and tensor charges with dynamical overlap quarks

TL;DR

This paper presents a calculation of nucleon axial and tensor charges using 2+1-flavor dynamical overlap quarks, employing advanced computational techniques to obtain preliminary results at near-physical quark masses.

Contribution

It introduces a novel calculation of nucleon charges with dynamical overlap quarks at a fixed lattice spacing, utilizing all-mode-averaging and all-to-all propagator techniques.

Findings

Preliminary isoscalar and isovector charge results at pion masses 450 and 540 MeV.

Efficient computation of disconnected quark loops.

Use of all-mode-averaging technique for correlation functions.

Abstract

We report on our calculation of the nucleon axial and tensor charges in 2+1-flavor QCD with dynamical overlap quarks. Gauge ensembles are generated at a single lattice spacing 0.12 fm and at a strange quark mass close to its physical value. We employ the all-mode-averaging technique to calculate the relevant nucleon correlation functions, and the disconnected quark loop is efficiently calculated by using the all-to-all quark propagator. We present our preliminary results for the isoscalar and isovector charges obtained at pion masses $m_\pi$ = 450 and 540 MeV.