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ID 14449
本文ファイル
著者
Aoki, S.
Fukugita, M.
Hashimoto, S.
Ishizuka, N.
Iwasaki, Y.
Kaneya, K.
Kaneko, T.
Kuramashi, Y.
Onogi, T.
Tsutsui, N.
Ukawa, A.
Yamada, N.
Yoshie, T.
JLQCD, Collaboration
キーワード
B0-anti-B0
B parameter
NRQCD
O(a)-improved Wilson action
NDC
物理学
抄録(英)
We present our results of lattice calculations of B parameters, which parametrize ΔB=2 transition amplitudes together with the leptonic decay constant. Calculations are made in the quenched approximation at β=5.7, 5.9, 6.0 and 6.1, using NRQCD action for heavy quarks and the O(a)-improved Wilson action for light quarks. The operators are perturbatively renormalized including the correction of O(αs/(aM)m) (m>~0). We examine the scaling behavior of B parameters, and discuss the systematic uncertainties based on the results with several different truncations of higher order terms in 1/M and αs expansions. We find BBd(mb)=0.84(3)(5), BBs/BBd=1.020(21)(+15-16)(+5-0) and BSs(mb)=0.85(1)(5)(+1-0) in the quenched approximation. The errors represent statistical and systematic errors as well as the uncertainty in the determination of strange quark mass.
掲載誌名
Physical Review D
67巻
1号
開始ページ
014506
出版年月日
2003-01
出版者
American Physical Society
ISSN
1550-7998
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
text
フォーマット
application/pdf
著者版フラグ
publisher
権利情報
Copyright (c) 2003 American Physical Society
関連情報URL
部局名
理学研究科