Measurement of the (B)over-bar(0) and B- meson lifetimes
文献类型：期刊论文
| 作者 | ALEPH Collaboration |
| 刊名 | PHYSICS LETTERS B
 |
| 出版日期 | 2000 |
| 卷号 | 492期号:3--4页码:275-287 |
| 关键词 | INCLUSIVE DECAYS ALEPH DETECTOR PERFORMANCE HADRONS LEP |
| 通讯作者 | Barate, R (reprint author), CNRS, IN2P3, Phys Particules Lab, LAPP, F-74019 Annecy Le Vieux, France. |
| 英文摘要 | The lifetimes of the (B) over bar (0) and B- mesons are measured using a sample of about four million hadronic Z decays collected from 1991 to 1995 with the ALEPH detector at LEP. The data sample has been recently reprocessed, achieving a substantial improvement in the tracking performance. Semileptonic decays of (B) over bar (0) and B- mesons are partially reconstructed by identifying events containing a lepton with an associated D*(+) or D-0 meson, The proper time of the B meson is estimated from the measured decay length and the momentum of the D-lepton system. A fit to the proper time of 1880 D*(+)l(-) and 2856 D(0)l(-) candidates yields the following results: tau ((B) over bar0) = 1.518 +/- 0.053 +/- 0.034 ps, tau (B-) = 1.648 +/- 0.049 +/- 0.035 ps, tau (B-)/tau ((B) over bar0) = 1.085 +/- 0.059 +/- 0.018. (C) 2000 Elsevier Science B.V. All rights reserved. |
| 学科主题 | Physics |
| 类目[WOS] | Physics, Multidisciplinary |
| 收录类别 | SCI |
| 语种 | 英语 |
| WOS记录号 | WOS:000165315700006 |
| 公开日期 | 2016-02-25 |
| 源URL | [http://ir.ihep.ac.cn/handle/311005/212085]  |
| 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 | ALEPH Collaboration. Measurement of the (B)over-bar(0) and B- meson lifetimes[J]. PHYSICS LETTERS B,2000,492(3--4):275-287. |
| APA | ALEPH Collaboration.(2000).Measurement of the (B)over-bar(0) and B- meson lifetimes.PHYSICS LETTERS B,492(3--4),275-287. |
| MLA | ALEPH Collaboration."Measurement of the (B)over-bar(0) and B- meson lifetimes".PHYSICS LETTERS B 492.3--4(2000):275-287. |
入库方式： OAI收割
来源：高能物理研究所
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