Non-perturbative renormalization of the axial current with improved Wilson quarks
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(r0 m) corrections to the axial current normalization constant ZA 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 ZA in the full two-flavor theory.
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