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ID 19257
本文ファイル
著者
JLQCD, Collaboration
Aoki, Sinya
Fukugita, Masataka
Hashimoto, Shoji
Ishikawa, Ken-Ichi
Ishizuka, Naruhito
Iwasaki, Yoichi
Kanaya, Kazuyuki
Kaneko, Takashi
Kaya, Shogo
Kuramashi, Yoshinobu
Onogi, Tetsuya
Tominaga, Shin-ichi
Tsutsui, Naoto
Ukawa, Akira
Yamada, Norikazu
Yoshie, Tomoteru
抄録(英)
We present a study for the pion decay constant fπ in the quenched approximation to lattice QCD with the Kogut-Susskind (KS) quark action, with the emphasis given to the renormalization problems. Numerical simulations are carried out at the couplings β=6.0 and 6.2 on 323×64 and 483×64 lattices, respectively. The pion decay constant is evaluated for all KS flavors via gauge invariant and noninvariant axial vector currents with the renormalization constants calculated by both the nonperturbative method and perturbation theory. We obtain fπ=89(6) MeV in the continuum limit as the best value using the partially conserved axial vector current, which requires no renormalization. From a study for the other KS flavors we find that the results obtained with the nonperturbative renormalization constants are well convergent among the KS flavors in the continuum limit, confirming restoration of SU(4)A, flavor symmetry, while perturbative renormalization still leaves an apparent flavor breaking effect even in the continuum limit.
掲載誌名
Physical Review D
62巻
9号
開始ページ
094501-1
終了ページ
094501-15
出版年月日
2000-10-02
出版者
American Physical Society
ISSN
1550-7998
NCID
出版者DOI
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
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権利情報
Copyright (c) 2000 The American Physical Society.
関連情報URL
部局名
理学研究科