Measurement of the axial-vector tau spectral functions and determination of alpha(s)(M-tau(2)) from hadronic tau decays
文献类型：期刊论文
| 作者 | ALEPH Collaboration |
| 刊名 | EUROPEAN PHYSICAL JOURNAL C
 |
| 出版日期 | 1998 |
| 卷号 | 4期号:3页码:409-431 |
| 关键词 | ELECTROWEAK RADIATIVE-CORRECTIONS RESONANCE PHYSICS PERTURBATIVE QCD SUM-RULES LEPTON LIFETIME ALPHA(S) ANNIHILATIONS ENERGIES DETECTOR LIBRARY |
| 通讯作者 | Barate, R (reprint author), Phys Particules Lab, CNRS, IN2P3, F-74019 Annecy Le Vieux, France. |
| 英文摘要 | An analysis based on 124000 selected tau pairs recorded by the ALEPH detector at LEP provides the vector (V) and axial-vector (A) spectral functions of hadronic tau decays together with their total widths. This allows the evaluation of finite energy chiral sum rules that are weighted integrals over the (V - A) spectral functions. In addition, a precise measurement of alpha(s) along with a determination of nonperturbative contributions at the tau mass scale is performed. The experimentally and theoretically most robust determination of alpha(s)(M-tau(2)) is obtained from the (V + A) fit that yields alpha(s)(M-tau(2)) = 0.334 +/- 0.022 giving alpha(s)(M-Z(2)) = 0.1202 +/- 0.0027 after the extrapolation to the mass of the Z boson. The approach of the Operator Product Expansion (OPE) is tested experimentally studying the evolution of the tau hadronic widths to masses smaller than the tau mass. |
| 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:000075027200003 |
| 公开日期 | 2016-02-25 |
| 源URL | [http://ir.ihep.ac.cn/handle/311005/211927]  |
| 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 axial-vector tau spectral functions and determination of alpha(s)(M-tau(2)) from hadronic tau decays[J]. EUROPEAN PHYSICAL JOURNAL C,1998,4(3):409-431. |
| APA | ALEPH Collaboration.(1998).Measurement of the axial-vector tau spectral functions and determination of alpha(s)(M-tau(2)) from hadronic tau decays.EUROPEAN PHYSICAL JOURNAL C,4(3),409-431. |
| MLA | ALEPH Collaboration."Measurement of the axial-vector tau spectral functions and determination of alpha(s)(M-tau(2)) from hadronic tau decays".EUROPEAN PHYSICAL JOURNAL C 4.3(1998):409-431. |
入库方式： OAI收割
来源：高能物理研究所
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