Measurement of the Michel parameters and the nu(tau) helicity in tau lepton decays
文献类型：期刊论文
| 作者 | ALEPH Collaborat |
| 刊名 | EUROPEAN PHYSICAL JOURNAL C
 |
| 出版日期 | 2001 |
| 卷号 | 22期号:2页码:217-230 |
| 关键词 | NEUTRINO HELICITY SEMILEPTONIC DECAYS LORENTZ STRUCTURE MUON DECAY PHYSICS POLARIZATION DETECTOR PARITY MODEL ALEPH |
| 通讯作者 | Heister, A (reprint author), Rhein Westfal TH Aachen, Inst Phys, D-52056 Aachen, Germany. |
| 英文摘要 | A measurement of the Michel parameters and the average nu(tau) helicity in tau lepton decays is described. The data was collected with the ALEPH detector at LEP during the years 1991 to 1995. A total integrated luminosity of 155 pb(-1) is analysed. The Michel parameters rho(l), xi(l), (xidelta) l (l = e, mu), and eta(mu) are determined for the leptonic decays, and the chirality parameters xi(pi), xi(rho), and xi(a1) for the hadronic final states. Under the assumptions of e-mu universality and xi(pi) = xi(rho) = xi(a1), the values rho(i) = 0.742 +/- 0.016, eta(i) = 0.012 +/- 0.026, (xidelta)l = 0.776 +/- 0.051, xil = 0.986 +/- 0.074, and xi(h) = 0.992 +/- 0.011 are obtained. No significant deviation is observed from the Standard Model assumption of the V - A structure of the charged weak interaction. |
| 学科主题 | Physics |
| 类目[WOS] | Physics, Particles & Fields |
| 收录类别 | SCI |
| 语种 | 英语 |
| WOS记录号 | WOS:000173172500002 |
| 公开日期 | 2016-02-25 |
| 源URL | [http://ir.ihep.ac.cn/handle/311005/212161]  |
| 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 Collaborat. Measurement of the Michel parameters and the nu(tau) helicity in tau lepton decays[J]. EUROPEAN PHYSICAL JOURNAL C,2001,22(2):217-230. |
| APA | ALEPH Collaborat.(2001).Measurement of the Michel parameters and the nu(tau) helicity in tau lepton decays.EUROPEAN PHYSICAL JOURNAL C,22(2),217-230. |
| MLA | ALEPH Collaborat."Measurement of the Michel parameters and the nu(tau) helicity in tau lepton decays".EUROPEAN PHYSICAL JOURNAL C 22.2(2001):217-230. |
入库方式： OAI收割
来源：高能物理研究所
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