Nonperturbative renormalization of meson decay constants in quenched QCD for a renormalization group improved gauge action
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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
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NDC |
物理学
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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.
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掲載誌名 |
Physical Review D
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巻 | 70巻
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開始ページ | 074502
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出版年月日 | 2004
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出版者 | The American Physical Society
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ISSN | 1550-7998
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言語 |
英語
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NII資源タイプ |
学術雑誌論文
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広大資料タイプ |
学術雑誌論文
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DCMIタイプ | text
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フォーマット | application/pdf
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著者版フラグ | publisher
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権利情報 | Copyright (c) 2004 The American Physical Society
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関連情報URL(IsVersionOf) | http://dx.doi.org/10.1103/PhysRevD.70.074502
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部局名 |
理学研究科
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