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  1. 050 理学部
  2. 10 学術雑誌論文
  3. 10 査読済論文
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  2. 01 学術雑誌論文

B meson decay constants from two-flavor lattice QCD with nonrelativistic heavy quarks

http://hdl.handle.net/10191/27627
http://hdl.handle.net/10191/27627
ec5b284e-6d0f-4152-a749-4df812917a63
名前 / ファイル ライセンス アクション
64_5_054504.pdf 64_5_054504.pdf (1.8 MB)
Item type 学術雑誌論文 / Journal Article(1)
公開日 2014-06-23
タイトル
タイトル B meson decay constants from two-flavor lattice QCD with nonrelativistic heavy quarks
タイトル
タイトル B meson decay constants from two-flavor lattice QCD with nonrelativistic heavy quarks
言語 en
言語
言語 eng
資源タイプ
資源 http://purl.org/coar/resource_type/c_6501
タイプ journal article
著者 Khan, A.Ali

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Khan, A.Ali

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Aoki, S.

× Aoki, S.

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Aoki, S.

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Burkhalter, R.

× Burkhalter, R.

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Burkhalter, R.

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Ejiri, S.

× Ejiri, S.

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Ejiri, S.

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Fukugita, M.

× Fukugita, M.

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Fukugita, M.

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Hashimoto, S.

× Hashimoto, S.

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Hashimoto, S.

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Ishizuka, N.

× Ishizuka, N.

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Ishizuka, N.

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Iwasaki, Y.

× Iwasaki, Y.

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Iwasaki, Y.

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Kanaya, K.

× Kanaya, K.

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Kanaya, K.

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Kaneko, T.

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Kaneko, T.

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Kuramashi, Y.

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Kuramashi, Y.

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Manke, T.

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Manke, T.

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Nagai, K.I.

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Nagai, K.I.

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Okawa, M.

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Okawa, M.

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Shanahan, H.P.

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Shanahan, H.P.

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Ukawa, A.

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Ukawa, A.

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Yoshie, T.

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Yoshie, T.

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CP-PACS, Collaboration

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CP-PACS, Collaboration

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抄録
内容記述タイプ Abstract
内容記述 We present a study of leptonic B meson decay constants in lattice QCD with two flavors (N f =2) of light dynamical quarks using nonrelativistic QCD for the heavy quark. Gauge configurations are generated with a renormalization-group improved gauge action and a mean-field-improved clover light quark action. Measurements are carried out at two values of β=6/g 2 , each for four sea quark masses, corresponding to inverse lattice spacings a -1 ≈1.3 and 1.8 GeV in the chiral limit of the sea quark. The continuum values of the decay constants are derived by evaluating the discretization errors at each finite lattice spacing. We find f N f =2 B =204(8)(29)(+44) MeV, f N f =2 B s =242(9)(34)(+38) MeV, and f N f =2 B s /f N f =2 B =1.179(18)(23), where the errors listed are statistical, systematic and uncertainty due to choice of the physical quantity used to fix the scale. Comparison is made to quenched results (N f =0) obtained with the same action combination and matching lattice spacings. We find f N f =2 B /f N f =0 B =1.07(5), f N f =2 B s /f N f =0 B s =1.10(5) and (f B s /f B ) N f =2 /(f B s /f B ) N f =0 =1.03(2), which indicate a 5–10 % increase in the values of the decay constants, but no appreciable change in the ratio f B s /f B , due to sea quarks.
書誌情報 Physical Review D
en : Physical Review D

巻 64, 号 5, p. 054504, 発行日 2001-08
出版者
出版者 American Physical Society
ISSN
収録物識別子タイプ ISSN
収録物識別子 15507998
書誌レコードID
収録物識別子タイプ NCID
収録物識別子 AA00773624
DOI
識別子タイプ DOI
関連識別子 info:doi/10.1103/PhysRevD.64.054504
権利
権利情報 (C) 2001 American Physical Society
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