Determination of αs at LEP by L3 experiment.

被引：0
|
作者：
Gentile, S [1 ]
机构：
[1] Univ Roma La Sapienza, Dipartimento Fis, Sez INFN, I-00185 Rome, Italy
来源：
NUCLEAR PHYSICS B-PROCEEDINGS SUPPLEMENTS | 2003年 / 121卷
关键词：
D O I：
10.1016/S0920-5632(03)01812-7
中图分类号：
O412 [相对论、场论]; O572.2 [粒子物理学];
学科分类号：
摘要：
The results on strong coupling constant, alpha(s), in e(+)e(-) collision at LEP are reviewed, based on hadronic events collected at centre-of-mass energies between 30 GeV and 208 GeV by the L3 experiment. In particularly the recent results at roots greater than or equal to 192 GeV are discussed. The distributions of several event shape variables are compared to resummed O(alpha(s)(2)) QCD calculations. These measurements, combined with previous L3 measurements at lower energies, demonstrate the running of alpha(s) as expected in QCD and yield alpha(s)(mz) = 0.1227 +/- 0.0012 +/- 0.0058, where the first uncertainty is experimental and the second is theoretical.
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页码：55 / 58
页数：4
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