@article{oai:tsukuba.repo.nii.ac.jp:00007773,
 author = {Ide, K. and Aoki, S. and Burkhalter, R. and Fukugita, M. and Hashimoto, S. and Ishikawa, K.-I. and Ishikawa, T. and Ishizuka, N. and Iwasaki, Y. and 岩崎, 洋一 and Kanaya, K. and Kaneko, T. and Kuramashi, Y. and Lesk, V. and Okawa, M. and Taniguchi, Y. and Umeda, T. and Ukawa, A. and 宇川, 彰 and Yoshie, T.},
 issue = {7},
 journal = {Physical review D},
 month = {Oct},
 note = {Renormalization constants (Z-factors ) of vector and axial-vector currents are determined nonperturbatively in quenched QCD for a renormalization group improved gauge action and a tadpole-improved clover quark action using the Schrodinger functional method. Nonperturbative values of Z-factors turn out to be smaller than 1-loop perturbative values by O(15%) at a lattice spacing of a^-1≈1 GeV. The pseudoscalar and vector meson decay constants calculated with the nonperturbative Z-factors show a much better scaling behavior compared to previous results obtained with tadpole-improved one-loop Z-factors. In particular, the nonperturbative Z-factors normalized at infinite physical volume show that the scaling violations of the decay constants are within about 10% up to the lattice spacing a^-1~1 GeV. The continuum estimates obtained from data in the range a^-1~ 1 -2GeV agree with those determined from finer lattices (a^-1~2-4 GeV) with the standard action.},
 title = {Nonperturbative renormalization of meson decay constants in quenched QCD for a renormalization group improved gauge action},
 volume = {70},
 year = {2004}
}