Non-perturbative determination of ZAstat in quenched QCD
Jochen Heitger, Martin Kurth, Rainer Sommer
Abstract
We non-perturbatively calculate the renormalization factor of the static axial vector current in O(a) improved quenched lattice QCD. Its scale dependence is mapped out in the Schroedinger functional scheme by means of a recursive finite-size scaling technique, taking the continuum limit in each step. We also obtain ZAstat for Wilson fermions in order to renormalize existing unimproved data on FBbare non-perturbatively.
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