Nucleon axial charge from quenched lattice QCD with domain wall fermions and DBW2 gauge action

Abstract

The domain wall fermion (DWF) method, with its almost perfectly preserved chiral symmetry on the lattice, makes the calculation of the nucleon axial charge particularly easy. By maintaining chiral symmetry and using the Ward-Takahashi (WT) identity, one has Z_A = Z_V and the bare lattice calculation yields the physical value without explicit renormalization. The DBW2 improved gauge action provides further enhancement of the symmetry and hence a more accurate WT identity at coarse lattice spacing. Taking advantage of these methods, we confirmed a significant volume dependence of the nucleon axial charge on (1.2 fm)^3 and (2.4 fm)^3 lattice volumes.

For the RBC Collaboration, Lattice2002(matrixel)

References in corpus (4)

• Renormalization group flow of SU(3) lattice gauge theory - Numerical studies in a two coupling space
• 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
• Domain wall fermion calculation of nucleon g_A/g_V

Cited by in corpus (2)

• The nucleon axial-vector coupling beyond one loop
• The extraction of the axial coupling from finite volume systems: The long and short of it