Measurements of the strong coupling constant and the QCD colour factors using four-jet observables from hadronic Z decays
ALEPH Collaboration
刊名EUROPEAN PHYSICAL JOURNAL C
2003
卷号27期号:1页码:1-17
学科分类Physics
DOI10.1140/epjc/s2002-01114-2
其他题名1
通讯作者Heister, A (reprint author), Rhein Westfal TH Aachen, Inst Phys, D-52056 Aachen, Germany.
文章类型Article
英文摘要Data from e(+)e(-) annihilation into hadrons, taken with the ALEPH detector at the Z resonance, are analyzed. The four-jet rate is studied as a function of the resolution parameter and compared to next-to-leading order calculations combined with resummation of large logarithms. Angular correlations in four-jet events are measured and compared to next-to-leading order QCD predictions. With these observables two different measurements are performed. In a first analysis the strong coupling constant is measured from the four-jet rate yielding alpha(S)(M(Z)) = 0.1170 +/- 0.0001(stat) +/- 0.0013(sys). In a second measurement the strong coupling constant and the QCD colour factors are determined simultaneously from a fit to the four-jet rate and the four-jet angular correlations, giving a(S)(M(Z)) = 0.119 +/- 0.006(stat) +/- 0.026(sys) C(A) = 2.93 +/- 0.14(stat) +/- 0.58(sys) C(F) = 1.35 +/- 0.07(stat) +/- 0.26(sys) in good agreement with the expectation from QCD.
类目[WOS]Physics, Particles & Fields
收录类别SCI
WOS记录号WOS:000182155700001
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被引频次:28[WOS]   [WOS记录]     [WOS相关记录]
文献类型期刊论文
条目标识符http://ir.ihep.ac.cn/handle/311005/225402
专题中国科学院高能物理研究所_实验物理中心_期刊论文
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ALEPH Collaboration. Measurements of the strong coupling constant and the QCD colour factors using four-jet observables from hadronic Z decays[J]. EUROPEAN PHYSICAL JOURNAL C,2003,27(1):1-17.
APA ALEPH Collaboration.(2003).Measurements of the strong coupling constant and the QCD colour factors using four-jet observables from hadronic Z decays.EUROPEAN PHYSICAL JOURNAL C,27(1),1-17.
MLA ALEPH Collaboration."Measurements of the strong coupling constant and the QCD colour factors using four-jet observables from hadronic Z decays".EUROPEAN PHYSICAL JOURNAL C 27.1(2003):1-17.
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