Branching ratio and CP asymmetry of B-s ->pi(+)pi(-) decays in the perturbative QCD approach
Li Y(李营); Lv CD(吕才典); Yu XQ(余先桥); Li, Y; Lu, CD; Xiao, ZJ; Yu, XQ
刊名PHYSICAL REVIEW D
2004
卷号70期号:3页码:34009
学科分类Astronomy & Astrophysics; Physics
DOI10.1103/PhysRevD.70.034009
通讯作者Chinese Ctr Adv Sci & Technol, World Lab, Beijing 100080, Peoples R China ; Inst High Energy Phys, Beijing 100039, Peoples R China ; Nanjing Normal Univ, Dept Phys, Jiangsu 210097, Peoples R China
文章类型Article
英文摘要In this paper, we calculate the decay rate and CP asymmetry of the B-s-->pi(+)pi(-) decay in the perturbative QCD approach with Sudakov resummation. Since none of the quarks in final states is the same as those of the initial B-s meson, this decay can occur only via annihilation diagrams in the standard model. Besides the current-current operators, the contributions from the QCD and electroweak penguin operators are also taken into account. We find that (a) the branching ratio is about 4x10(-7); (b) the penguin diagrams dominate the total contribution; and (c) the direct CP asymmetry is small in size: no more than 3%; but the mixing-induced CP asymmetry can be as large as 10% testable in the near future LHC-b experiments.
类目[WOS]Astronomy & Astrophysics ; Physics, Particles & Fields
研究领域[WOS]Astronomy & Astrophysics ; Physics
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语种英语
WOS记录号WOS:000223859600036
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被引频次:59[WOS]   [WOS记录]     [WOS相关记录]
文献类型期刊论文
条目标识符http://ir.ihep.ac.cn/handle/311005/240543
专题中国科学院高能物理研究所_理论物理室_期刊论文
作者单位中国科学院高能物理研究所
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Li Y,Lv CD,Yu XQ,et al. Branching ratio and CP asymmetry of B-s ->pi(+)pi(-) decays in the perturbative QCD approach[J]. PHYSICAL REVIEW D,2004,70(3):34009.
APA 李营.,吕才典.,余先桥.,Li, Y.,Lu, CD.,...&Yu, XQ.(2004).Branching ratio and CP asymmetry of B-s ->pi(+)pi(-) decays in the perturbative QCD approach.PHYSICAL REVIEW D,70(3),34009.
MLA 李营,et al."Branching ratio and CP asymmetry of B-s ->pi(+)pi(-) decays in the perturbative QCD approach".PHYSICAL REVIEW D 70.3(2004):34009.
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