Measurements of branching fractions, rate asymmetries, and angular distributions in the rare decays B -> Kl(+)l(-) and B -> K(*)l(+)l(-)
文献类型：期刊论文
| 作者 | BaBar Collaboration |
| 刊名 | PHYSICAL REVIEW D
 |
| 出版日期 | 2006 |
| 卷号 | 73期号:9 |
| 关键词 | LIGHT-CONE QCD SUM-RULE ANALYSIS STANDARD MODEL B->K-ASTERISK-L(+)L(-) B->KL(+)L(-) PHYSICS |
| 通讯作者 | Aubert, B (reprint author), Phys Particules Lab, F-74941 Annecy Le Vieux, France. |
| 英文摘要 | We present measurements of the flavor-changing neutral current decays B -> K center dot(+)center dot(-) and B -> K-*center dot(+)center dot(-), where center dot(+)center dot(-) is either an e(+)e(-) or mu(+)mu(-) pair. The data sample comprises 229x10(6) Upsilon(4S)-> B (B) over bar decays collected with the BABAR detector at the PEP-II e(+)e(-) storage ring. Flavor-changing neutral current decays are highly suppressed in the standard model and their predicted properties could be significantly modified by new physics at the electroweak scale. We measure the branching fractions B(B -> K center dot(+)center dot(-))=(0.34 +/- 0.07 +/- 0.02)x10(-6), B(B -> K-*center dot(+)center dot(-))=(0.78(-0.17)(+0.19)+/- 0.11)x10(-6), the direct CP asymmetries of these decays, and the relative abundances of decays to electrons and muons. For two regions in center dot(+)center dot(-) mass, above and below m(J/psi), we measure partial branching fractions and the forward-backward angular asymmetry of the lepton pair. In these same regions we also measure the K-* longitudinal polarization in B -> K-*center dot(+)center dot(-) decays. Upper limits are obtained for the lepton-flavor-violating decays B -> Ke mu and B -> K(*)e mu. All measurements are consistent with standard model expectations. |
| 学科主题 | Astronomy & Astrophysics; Physics |
| 类目[WOS] | Astronomy & Astrophysics ; Physics, Particles & Fields |
| 收录类别 | SCI |
| 语种 | 英语 |
| WOS记录号 | WOS:000237950900004 |
| 公开日期 | 2016-02-26 |
| 源URL | [http://ir.ihep.ac.cn/handle/311005/212663]  |
| 专题 | 高能物理研究所_实验物理中心 |
| 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 | BaBar Collaboration. Measurements of branching fractions, rate asymmetries, and angular distributions in the rare decays B -> Kl(+)l(-) and B -> K(*)l(+)l(-)[J]. PHYSICAL REVIEW D,2006,73(9). |
| APA | BaBar Collaboration.(2006).Measurements of branching fractions, rate asymmetries, and angular distributions in the rare decays B -> Kl(+)l(-) and B -> K(*)l(+)l(-).PHYSICAL REVIEW D,73(9). |
| MLA | BaBar Collaboration."Measurements of branching fractions, rate asymmetries, and angular distributions in the rare decays B -> Kl(+)l(-) and B -> K(*)l(+)l(-)".PHYSICAL REVIEW D 73.9(2006). |
入库方式： OAI收割
来源：高能物理研究所
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