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We present a new normalization condition for the axial current, derived fromthe PCAC relation with non-vanishing quark mass. This condition is expected toreduce mass effects in the chiral extrapolation of the results for thenormalization factor Z_A. The application to the two-flavor theory withimproved Wilson fermions shows that this expectation is indeed fulfilled. Usingthe Schroedinger functional setup we calculate Z_A(g_0^2) as well as the vectorcurrent normalization factor Z_V(g_0^2) for beta = 6/g_0^2 >= 5.2.Comment: 15 pages, 4 figures, 2 tables, JHEP styl

Non-perturbative renormalization of the axial current with dynamical Wilson fermions