B meson leptonic decay constant with quenched lattice NRQCD
Physical Review D 61 巻 7 号
074501- 頁
2000-04 発行
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全文
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タイトル ( eng ) |
B meson leptonic decay constant with quenched lattice NRQCD
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作成者 |
JLQCD Collaboration
Yamada N
Aoki S
Fukugita M
Hashimoto S
Ishizuka N
Iwasaki Y
Kanaya K
Kaneda T
Kaya S
Kuramashi Y
Matsufuru H
Onogi T
Tominaga S
Tsutsui N
Ukawa A
Yoshie T
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収録物名 |
Physical Review D
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巻 | 61 |
号 | 7 |
開始ページ | 074501 |
抄録 |
We present a lattice NRQCD study of the B meson decay constant in the quenched approximation with emphasis given to the scaling behavior. The NRQCD action and the heavy-light axial vector current we use include all terms of order 1/M and the perturbative O(αsa) and O(αs/M) corrections. Using simulations at three values of couplings β=5.7, 5.9, and 6.1 on lattices of sizes 123×32, 163×48, and 243×64, we find a significant a dependence disappears in fB if the O(αsa) correction is included in the axial vector current. We observe that β=5.9-6.1 is the window where systematic errors are expected to be minimum within one-loop improved theory. Our final results are fB=170(5)(15) MeV, fBs=191(4)(17)(-0+4) MeV, and fBs/fB=1.12(2)(1)(-0+3), where the first error is statistical, the second is systematic, and the third is due to the uncertainty of the strange quark mass, while quenching errors are not included.
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著者キーワード |
lattice NRQCD
B meson decay constant
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NDC分類 |
物理学 [ 420 ]
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言語 |
英語
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資源タイプ | 学術雑誌論文 |
出版者 |
American Physical Society
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発行日 | 2000-04 |
権利情報 |
Copyright (c) 2000 American Physical Society
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出版タイプ | Version of Record(出版社版。早期公開を含む) |
アクセス権 | オープンアクセス |
収録物識別子 |
[ISSN] 1550-7998
[DOI] 10.1103/PhysRevD.61.074501
[DOI] http://dx.doi.org/10.1103/PhysRevD.61.074501
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