Branching ratio and CP asymmetry of B-s ->pi(+)pi(-) decays in the perturbative QCD approach
文献类型：期刊论文
| 作者 | Li Y(李营); Lv CD(吕才典) ; Yu XQ(余先桥); Li, Y; Lu, CD; Xiao, ZJ; Yu, XQ
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| 刊名 | PHYSICAL REVIEW D
 |
| 出版日期 | 2004 |
| 卷号 | 70期号:3页码:34009 |
| 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 |
| 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. |
| 学科主题 | Astronomy & Astrophysics; Physics |
| 类目[WOS] | Astronomy & Astrophysics ; Physics, Particles & Fields |
| 研究领域[WOS] | Astronomy & Astrophysics ; Physics |
| 原文出处 | SCI |
| 语种 | 英语 |
| WOS记录号 | WOS:000223859600036 |
| 源URL | [http://ir.ihep.ac.cn/handle/311005/240543]  |
| 专题 | 高能物理研究所_理论物理室 |
| 作者单位 | 中国科学院高能物理研究所 |
| 推荐引用方式 GB/T 7714 | 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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来源：高能物理研究所
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