Renormalization of bilinear quark operators for the chirally improved lattice Dirac operator

Abstract

We compute non-perturbative renormalization constants of fermionic bilinears for the chirally improved lattice fermions in the quenched approximation of QCD. We address finite size effects and the influence of Gribov copies. Our results are presented in the RI' and MSbar schemes as well as in RGI form and we discuss relations between the renormalization constants implied by chiral symmetry. After publication we corrected the numerator of the first coefficient of \alpha_s^3 in (24) from 3696847 to 3890527, which yields a 0.2% higher value of the conversion coefficient at \mu=2 GeV.

Comments: 24 pages, 7 figures, final version, After publication we corrected the numerator of the first coefficient of \alpha_s^3 in (24) from 3696847 to 3890527, which yields a 0.2% higher value of the conversion coefficient at \mu=2 GeV