QCD studies in e(+)e(-) annihilation from 30 GeV to 189 GeV
文献类型：期刊论文
| 刊名 | PHYSICS LETTERS B
 |
| 出版日期 | 2000 |
| 卷号 | 489期号:1--2页码:65-80 |
| 关键词 | EVENT SHAPE DISTRIBUTIONS ANGLE BHABHA SCATTERING LEPTON PAIR PRODUCTION TO-LEADING ORDER MONTE-CARLO E+E ANNIHILATION HADRONIC EVENTS CROSS-SECTIONS L3 EXPERIMENT POWER CORRECTIONS |
| 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 results obtained from a study of the structure of hadronic events recorded by the L3 detector at various centre-of-mass energies. The distributions of event shape variables and the energy dependence of their mean values are measured from 30 GeV to 189 GeV and compared with various QCD models. The energy dependence of the moments of event shape variables is used to test a power law ansatz for the non-perturbative component, We obtain a universal value of the non-perturbative parameter alpha(0) = 0.537 +/- 0.073. From a comparison with resummed O(alpha(s)(2)) QCD calculations, we determine the strong coupling constant at each of the selected energies. The measurements demonstrate the running of alpha(s) as expected in QCD with a Value of alpha(s)(m(Z)) = 0.1215 +/- 0.0012 (exp) +/- 0.0061 (th). (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:000089439200008 |
| 公开日期 | 2016-02-25 |
| 源URL | [http://ir.ihep.ac.cn/handle/311005/212069]  |
| 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 | . QCD studies in e(+)e(-) annihilation from 30 GeV to 189 GeV[J]. PHYSICS LETTERS B,2000,489(1--2):65-80. |
| APA | (2000).QCD studies in e(+)e(-) annihilation from 30 GeV to 189 GeV.PHYSICS LETTERS B,489(1--2),65-80. |
| MLA | "QCD studies in e(+)e(-) annihilation from 30 GeV to 189 GeV".PHYSICS LETTERS B 489.1--2(2000):65-80. |
入库方式： OAI收割
来源：高能物理研究所
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