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 Δ q/ g V and δ q/ g V .
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