Domain wall fermion calculation of nucleon g_A/g_V

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.

Lattice 2000 (Hadronic Matrix Elements), 4 pages, 5 figures

References in corpus (1)

• Towards a lattice calculation of $\Delta q$ and $\delta q$

Cited by in corpus (8)

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• Nucleons in Two-Flavor Partially-Quenched Chiral Perturbation Theory
• Quark scalar, axial, and pseudoscalar charges in the Schwinger-Dyson formalism
• Delocalization of the axial charge in the chiral limit
• The extraction of the axial coupling from finite volume systems: The long and short of it
• Nucleon axial charge from quenched lattice QCD with domain wall fermions and DBW2 gauge action
• Axial Vector Current and Coupling of the Quark in the Instanton Model