Time-integrated and time-dependent angular analyses of B -> J/psi K pi: A measurement of cos2 beta with no sign ambiguity from strong phases
文献类型：期刊论文
| 作者 | BaBar Collaboration |
| 刊名 | PHYSICAL REVIEW D
 |
| 出版日期 | 2005 |
| 卷号 | 71期号:3 |
| 关键词 | DECAY AMPLITUDES DISCRETE AMBIGUITIES BRANCHING FRACTIONS K-ASTERISK B DECAYS DISTRIBUTIONS ASYMMETRIES SCATTERING PHYSICS |
| 通讯作者 | Aubert, B (reprint author), Lab Annecy Le Vieux Phys Particules, F-74941 Annecy Le Vieux, France. |
| 英文摘要 | We present results on B-->J/psiKpi decays using e(+)e(-)annihilation data collected with the BABAR detector at the Y(4S) resonance. The detector is located at the PEP-II asymmetric-energy storage ring facility at the Stanford Linear Accelerator Center. Using approximately 88x10(6) B (B) over bar pairs, we measure the decay amplitudes for the flavor eigenmodes and observe strong-phase differences indicative of final-state interactions with a significance of 7.6 standard deviations. We use the interference between the Kpi S-wave and P-wave amplitudes in the region of the K-*(892) to resolve the ambiguity in the determination of these strong phases. We then perform an ambiguity-free measurement of cos2beta using the angular and time-dependent asymmetry in B-->J/psiK(*0)(K(S)(0)pi(0)) decays. With sin2beta fixed at its measured value and cos2beta treated as an independent parameter, we find cos2beta=2.72(-0.79)(+0.50)(stat)+/-0.27(syst), determining the sign of cos2beta to be positive at 86% C.L. |
| 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:000227319400011 |
| 公开日期 | 2016-02-26 |
| 源URL | [http://ir.ihep.ac.cn/handle/311005/212517]  |
| 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. Time-integrated and time-dependent angular analyses of B -> J/psi K pi: A measurement of cos2 beta with no sign ambiguity from strong phases[J]. PHYSICAL REVIEW D,2005,71(3). |
| APA | BaBar Collaboration.(2005).Time-integrated and time-dependent angular analyses of B -> J/psi K pi: A measurement of cos2 beta with no sign ambiguity from strong phases.PHYSICAL REVIEW D,71(3). |
| MLA | BaBar Collaboration."Time-integrated and time-dependent angular analyses of B -> J/psi K pi: A measurement of cos2 beta with no sign ambiguity from strong phases".PHYSICAL REVIEW D 71.3(2005). |
入库方式： OAI收割
来源：高能物理研究所
浏览0
下载0
收藏0
其他版本
除非特别说明，本系统中所有内容都受版权保护，并保留所有权利。