このエントリーをはてなブックマークに追加
ID 14606
本文ファイル
著者
CP-PACS, Collaboration
Ide, K
Aoki, S
Burkhalter, R
Fukugita, M
Hashimoto, S
Ishikawa, T
Ishizuka, N
Iwasaki, Y
Kanaya, K
Kaneko, T
Kuramashi, Y
Lesk, V
Taniguchi, Y
Umeda, T
Ukawa, A
Yoshié, T
NDC
物理学
抄録(英)
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 Schrödinger 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[approximate] 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 100p to the lattice spacing a-1~1 GeV. The continuum estimates obtained from data in the range a-1~ 1–2 GeV agree with those determined from finer lattices (a-1~2-4 GeV) with the standard action.
掲載誌名
Physical Review D
70巻
開始ページ
074502
出版年月日
2004
出版者
The American Physical Society
ISSN
1550-7998
言語
英語
NII資源タイプ
学術雑誌論文
広大資料タイプ
学術雑誌論文
DCMIタイプ
text
フォーマット
application/pdf
著者版フラグ
publisher
権利情報
Copyright (c) 2004 The American Physical Society
関連情報URL(IsVersionOf)
http://dx.doi.org/10.1103/PhysRevD.70.074502
部局名
理学研究科