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题名: Heavy-to-light currents at NNLO in SCET and semi-inclusive (B)over-bar -> X(s)l(+)l(-) decay
作者: Bell, G ;  Beneke, M ;  Huber, T ;  Li, XQ
刊名: NUCLEAR PHYSICS B
出版日期: 2011
卷号: 843, 期号:1, 页码:143-176
关键词: COLLINEAR EFFECTIVE THEORY ;  MESON FORM-FACTORS ;  B DECAYS ;  VERTEX CORRECTIONS ;  QCD FACTORIZATION ;  STANDARD MODEL ;  PHOTON ENERGY ;  2-LOOP RESULT ;  LARGE RECOIL ;  QUARK
学科分类: Physics
通讯作者: Li, XQ (reprint author), Henan Normal Univ, Dept Phys, Xinxiang 453007, Henan, Peoples R China.
部门归属: [Li, Xin-Qiang] Henan Normal Univ, Dept Phys, Xinxiang 453007, Henan, Peoples R China; [Li, Xin-Qiang] Chinese Acad Sci, Inst Theoret Phys, Beijing 100190, Peoples R China; [Bell, G.] Univ Bern, Albert Einstein Ctr Fundamental Phys, Inst Theoret Phys, CH-3012 Bern, Switzerland; [Beneke, M.] Rhein Westfal TH Aachen, Inst Theoret Teilchenphys & Kosmol, D-52056 Aachen, Germany; [Huber, T.] Univ Siegen, Fachbereich 7, D-57068 Siegen, Germany; [Li, Xin-Qiang] Chinese Acad Sci, Inst Theoret Phys, Beijing 100190, Peoples R China
英文摘要: We perform the two-loop matching calculation for heavy-to-light currents from QCD onto soft-collinear effective theory for the complete set of Dirac structures. The newly obtained matching coefficients enter several phenomenological applications, of which we discuss heavy-to-light form factor ratios and exclusive radiative decays. as well as the semi-inclusive decay (B) over bar -> X(s)l(+)l(-). For this decay, we observe a significant shift of the forward-backward asymmetry zero and find q(0)(2) = (3.34(-0.25)(+0.22)) GeV2 for an invariant mass cut, m(X)(cut) = 2.0 GeV. (C) 2010 Elsevier B.V. All rights reserved.
资助者: DFG [Sonderforschungsbereich/Transregio 9]; Helmholtz alliance "Physics at the Terascale"; Alexander-von-Humboldt Stiftung; National Natural Science Foundation [11005032]
收录类别: SCI
原文出处: 查看原文
语种: 英语
WOS记录号: WOS:000285024100006
Citation statistics: 
内容类型: 期刊论文
URI标识: http://ir.itp.ac.cn/handle/311006/14423
Appears in Collections:理论物理所2011年知识产出_期刊论文

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Recommended Citation:
Bell, G,Beneke, M,Huber, T,et al. Heavy-to-light currents at NNLO in SCET and semi-inclusive (B)over-bar -> X(s)l(+)l(-) decay[J]. NUCLEAR PHYSICS B,2011,843(1):143-176.
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