Measurement of the Z resonance parameters at LEP
文献类型：期刊论文
| 作者 | ALEPH Collaboration |
| 刊名 | EUROPEAN PHYSICAL JOURNAL C
 |
| 出版日期 | 2000 |
| 卷号 | 14期号:1页码:1-50 |
| 关键词 | ANGLE BHABHA SCATTERING ORDER RADIATIVE-CORRECTIONS FERMION PAIR PRODUCTION CARLO PROGRAM KORALZ MONTE-CARLO QED CORRECTIONS ENERGY CALIBRATION REALISTIC APPROACH PHOTON CORRECTIONS EVENT GENERATION |
| 通讯作者 | Barate, R (reprint author), CNRS, IN2P3, Phys Particules Lab, LAPP, Annecy Le Vieux, France. |
| 英文摘要 | The properties of the Z resonance are measured from the analysis of 4.5 million Z decays into fermion pairs collected with the ALEPII detector at LEP. The data are consistent with lepton universality. The resonance parameters are measured to be M(Z) = (91.1885 +/- 0.0031) GeV/c(2), Gamma(Z) = (2.4941 +/- 0.0043) GeV, sigma(had)(0) = (41.559 +/- 0.058) nb and, combining the three lepton flavours, R(l) = 20.725 +/- 0.039. The corresponding number of light neutrino species is N(v) = 2.983 +/- 0.013 and the strong coupling constant is alpha(s)(M(Z)) = 0.114 +/- 0.004 +/- 0.002(QCD) + 0.005 log(10) [M(H)/150 GeV/c(2)]. The lepton pair forward-backward asymmetry is measured to be A(FB)(0,l) = 0.0173 +/- 0.0016 from which the effective weak mixing angle is described: sin(2) theta(eff)(lept) = 0.23089 +/- 0.00089. The measurement of the leptonic width Gamma(ll) = 84.02 +/- 0.15 MeV leads to a determination of the effective rho parameter rho(eff)(lept) = 1.0064 +/- 0.0018. The data support the Standard Model and favour a light Higgs. |
| 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:000087421800001 |
| 公开日期 | 2016-02-25 |
| 源URL | [http://ir.ihep.ac.cn/handle/311005/212044]  |
| 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 Z resonance parameters at LEP[J]. EUROPEAN PHYSICAL JOURNAL C,2000,14(1):1-50. |
| APA | ALEPH Collaboration.(2000).Measurement of the Z resonance parameters at LEP.EUROPEAN PHYSICAL JOURNAL C,14(1),1-50. |
| MLA | ALEPH Collaboration."Measurement of the Z resonance parameters at LEP".EUROPEAN PHYSICAL JOURNAL C 14.1(2000):1-50. |
入库方式： OAI收割
来源：高能物理研究所
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