Non-perturbative renormalization of vector and axial vector currents in quenched QCD for a renormalization group improved gauge action
PACS Collaboration, K. Ide, S. Aoki, M. Fukugita, N. Ishizuka, Y. Iwasaki, K. Kanaya, T. Kaneko, Y. Kuramashi, V. Lesk, M. Okawa, Y. Taniguchi, A. Ukawa, T. Yoshié
Abstract
Renormalization constants of vector (ZV) and axial-vector (ZA) currents are determined non-perturbatively in quenched QCD for an RG-improved gauge action and a tadpole-improved clover quark action using the Schrödinger functional method. Meson decay constants fρ and fπ show much better scaling when ZV and ZA estimated for infinite physical volume are used instead of Z-factors from tadpole-improved one-loop perturbation theory.
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