Measurement of the average lifetime of b-hadrons in Z decays
文献类型：期刊论文
| 刊名 | PHYSICS LETTERS B
 |
| 出版日期 | 1998 |
| 卷号 | 416期号:1--2页码:220-232 |
| 关键词 | LUND MONTE-CARLO HEAVY QUARKS PRECISION-MEASUREMENT JET FRAGMENTATION E+E ANNIHILATION L3 EXPERIMENT PARTICLES PHYSICS |
| 通讯作者 | Acciarri, M (reprint author), Rhein Westfal TH Aachen, Inst Phys 1, D-52056 Aachen, Germany. |
| 英文摘要 | We present a measurement of the average b-hadron lifetime tau(b) at the e(+)e(-) collider LEP. Using hadronic Z decays collected in the period from 1991 to 1994, two independent analyses have been performed. In the first one, the b-decay position is reconstructed as a secondary vertex of hadronic b-decay particles. The second analysis is an updated measurement of tau(b) using the impact parameter of leptons with high momentum and high transverse momentum. The combined result is tau(b) = [1549 +/- 9 (stat) +/- 15 (syst)] fs. In addition, we measure the average charged b-decay multiplicity [n(b)] and the normalized average b-energy [x(E)](b) at LEP to be [n(b)] = 4.90 +/- 0.04 (stat) +/- 0.11 (syst), [x(E)](b) = 0.709 +/- 0.004 (stat + syst). (C) 1998 Published by Elsevier Science B.V. |
| 学科主题 | Physics |
| 类目[WOS] | Physics, Multidisciplinary |
| 收录类别 | SCI |
| 语种 | 英语 |
| WOS记录号 | WOS:000071427500032 |
| 公开日期 | 2016-02-25 |
| 源URL | [http://ir.ihep.ac.cn/handle/311005/211900]  |
| 专题 | 高能物理研究所_粒子天体物理中心 |
| 推荐引用方式 GB/T 7714 | . Measurement of the average lifetime of b-hadrons in Z decays[J]. PHYSICS LETTERS B,1998,416(1--2):220-232. |
| APA | (1998).Measurement of the average lifetime of b-hadrons in Z decays.PHYSICS LETTERS B,416(1--2),220-232. |
| MLA | "Measurement of the average lifetime of b-hadrons in Z decays".PHYSICS LETTERS B 416.1--2(1998):220-232. |
入库方式： OAI收割
来源：高能物理研究所
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