Nucleon axial and tensor charges with dynamical overlap quarks

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.

Comments: 7 pages, 10 figures, proceeding of the 33rd International Symposium on Lattice field theory (Lattice 2015), Kobe, Japan, July 2015