B0-anti-B0 Mixing in Unquenched Lattice QCD
Physical Review Letters 91 巻 21 号
212001- 頁
2003-11 発行
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| ファイル情報(添付) | |
| タイトル ( eng ) |
B0-anti-B0 Mixing in Unquenched Lattice QCD
|
| 作成者 |
Aoki S.
Fukugita M.
Hashimoto S.
Ishizuka N.
Iwasaki Y.
Kanaya K.
Kaneko T.
Kuramashi Y.
Onogi T.
Tsutsui N.
Ukawa A.
Yamada N.
Yoshie T.
|
| 収録物名 |
Physical Review Letters
|
| 巻 | 91 |
| 号 | 21 |
| 開始ページ | 212001 |
| 抄録 |
We present an unquenched lattice calculation for the B0-anti-B0 transition amplitude. The calculation, carried out at an inverse lattice spacing 1/a=2.22(4)GeV, incorporates two flavors of dynamical quarks described by the O(a)-improved Wilson fermion action and heavy quarks described by nonrelativistic QCD. Particular attention is paid to the uncertainty that arises from the chiral extrapolation, especially the effect of pion loops, for light quarks, which we find could be sizable for the leptonic decay constant, whereas it is small for the B parameters. We obtain fBd=191(10)(+12-22)MeV, fBs/fBd=1.13(3)(+13-2), BBd(mb)=0.836(27)(+56-62), BBs/BBd=1.017(16)(+56-17), and ξ=1.14(3)(+13-2), where the first error is statistical, and the second is systematic, including uncertainties due to chiral extrapolation, finite lattice spacing, heavy quark expansion, and perturbative operator matching.
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| 著者キーワード |
unquenched lattice calculation
Wilson fermion action
QCD
B0-anti-B0
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| NDC分類 |
物理学 [ 420 ]
|
| 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
|
| 発行日 | 2003-11 |
| 権利情報 |
Copyright (c) 2001 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] 0031-9007
[DOI] 10.1103/PhysRevLett.91.212001
[DOI] http://dx.doi.org/10.1103/PhysRevLett.91.212001
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