Domain wall fermion calculation of nucleon g_A/g_V
High Energy Physics - Lattice
2009-10-31 v1
Abstract
We present a preliminary domain-wall fermion lattice-QCD calculation of isovector vector and axial charges, g_V and g_A, of the nucleon. Since the lattice renormalizations, Z_V and Z_A, of the currents are identical with DWF, the lattice ratio (g_A/g_V)^{lattice} directly yields the continuum value. Indeed Z_V determined from the matrix element of the vector current agrees closely with Z_A from a non-perturbative renormalization study of quark bilinears. We also obtain spin related quantities Delta-q/g_V and delta-q/g_V.
Cite
@article{arxiv.hep-lat/0011011,
title = {Domain wall fermion calculation of nucleon g_A/g_V},
author = {Tom Blum and Shigemi Ohta and Shoichi Sasaki},
journal= {arXiv preprint arXiv:hep-lat/0011011},
year = {2009}
}
Comments
Lattice 2000 (Hadronic Matrix Elements), 4 pages, 5 figures