Non-perturbative renormalization of the axial current with improved Wilson quarks
arXiv:hep-lat/0309071 · doi:10.1016/S0920-5632(03)02602-1
Abstract
We present a new normalization condition for the axial current, which is derived from the PCAC relation with non-vanishing mass. Using this condition reduces the O(r_0 m) corrections to the axial current normalization constant Z_A for an easier chiral extrapolation in the cases, where simulations at zero quark-mass are not possible. The method described here also serves as a preparation for a determination of Z_A in the full two-flavor theory.
3 pages, 3 figures, Lattice2003(improve)