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Decay constants of B and D mesons from improved relativistic lattice QCD with two flavors of sea quarks
http://hdl.handle.net/2241/89373
http://hdl.handle.net/2241/89373912541cb-10b6-41c0-be46-05b7e4635b13
名前 / ファイル | ライセンス | アクション |
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PRD_64-3.pdf (251.4 kB)
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Item type | Journal Article(1) | |||||
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公開日 | 2007-05-24 | |||||
タイトル | ||||||
言語 | en | |||||
タイトル | Decay constants of B and D mesons from improved relativistic lattice QCD with two flavors of sea quarks | |||||
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 | |||||
アクセス権 | ||||||
アクセス権 | open access | |||||
アクセス権URI | http://purl.org/coar/access_right/c_abf2 | |||||
著者 |
Khan, A. Ali
× Khan, A. Ali× Aoki, S.× Burkhalter, R.× Ejiri, S.× Fukugita, M.× Hashimoto, S.× Ishizuka, N.× 岩崎, 洋一× Kanaya, K.× Kaneko, T.× Kuramashi, Y.× Manke, T.× Nagai, K.× Okawa, M.× Shanahan, H. P.× 宇川, 彰× Yoshie, T. |
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抄録 | ||||||
内容記述タイプ | Abstract | |||||
内容記述 | We present a calculation of the B and D meson decay constants in lattice QCD with two (Nf=2) flavors of light dynamical quarks, using an O(a)-improved Wilson action for both light and heavy quarks and a renormalization-group improved gauge action. Simulations are made at three values of lattice spacing a=0.22,0.16,0.11 fm and four values of sea quark mass in the range mPS/mV≈0.8-0.6. Our provisional estimate for the continuum values of the decay constants are fBd=208(10)(29) MeV, fBs=250(10)(35)(-0+8) MeV, fDd=225(14)(40) MeV, fDs=267(13)(48)(-0+10) MeV for Nf=2 where the statistical and systematic errors are separately listed, and the third error for fBs and fDs shows the uncertainty of the determination of the strange quark mass. We also carry out a set of quenched simulations using the same action to make a direct examination of sea quark effects. Taking the ratio of results for Nf=2 and Nf=0, we obtain fBdNf=2/fBdNf=0=1.11(6),fBsNf=2/fBsNf=0=1.14(5),fDdNf=2/fDdNf=0=1.03(6),fDsNf=2/fDsNf=0=1.07(5). They show a 10-15 % increase in the Nf=2 results over those of Nf=0 for the B meson decay constants, while evidence for such a trend is statistically less clear for the D meson decay constants. | |||||
言語 | en | |||||
書誌情報 |
en : Physical review D 巻 64, 号 3, p. 034505, 発行日 2001-07 |
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ISSN | ||||||
収録物識別子タイプ | PISSN | |||||
収録物識別子 | 2470-0010 | |||||
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 | ||||||
関連タイプ | isIdenticalTo | |||||
識別子タイプ | DOI | |||||
関連識別子 | https://doi.org/10.1103/PhysRevD.64.034505 | |||||
権利 | ||||||
言語 | en | |||||
権利情報 | (c) 2001 The American Physical Society | |||||
出版タイプ | ||||||
出版タイプ | VoR | |||||
出版タイプResource | http://purl.org/coar/version/c_970fb48d4fbd8a85 | |||||
出版者 | ||||||
言語 | en | |||||
出版者 | American Physical Society | |||||
URI | ||||||
識別子 | http://hdl.handle.net/2241/89373 | |||||
識別子タイプ | HDL |