A measurement of the QCD colour factors and a limit on the light gluino
ALEPH Collaboration
刊名ZEITSCHRIFT FUR PHYSIK C-PARTICLES AND FIELDS
1997
卷号76期号:1页码:1-14
学科分类Physics
DOI10.1007/s002880050522
其他题名1
通讯作者Barate, R (reprint author), IN2P3, CNRS, LAPP, F-74019 ANNECY LE VIEUX, FRANCE.
文章类型Article
英文摘要Using data collected from 1992 to 1995 with the ALEPH detector at LEP, a measurement of the colour factor ratios C-A/C-F and T-F/C-F and the strong coupling constant <(alpha)over bar (s)> = C-F alpha(s), (M-Z)/(2 pi) has been performed by fitting theoretical predictions simultaneously to the measured differential two-jet rate and angular distributions in four-jet events. The result is found to be in excellent agreement with QCD. C-A/C-F = 2.20 +/- 0.09 (stat) +/- 0.13 (syst), T-F/C-F = 0.29 +/- 0.05 (stat) +/- 0.06 (syst). Fixing C-A/C-F and T-F/C-F to the QCD values permits a determination of alpha(s) (M-Z) and n(f), the number of active flavours. With this measurement the existence of a gluino with mass below 6.3 GeV/c(2) is excluded at 95% confidence level.
类目[WOS]Physics, Particles & Fields
收录类别SCI
WOS记录号WOS:A1997XX11500001
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被引频次:42[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/311005/225395
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. A measurement of the QCD colour factors and a limit on the light gluino[J]. ZEITSCHRIFT FUR PHYSIK C-PARTICLES AND FIELDS,1997,76(1):1-14.
APA ALEPH Collaboration.(1997).A measurement of the QCD colour factors and a limit on the light gluino.ZEITSCHRIFT FUR PHYSIK C-PARTICLES AND FIELDS,76(1),1-14.
MLA ALEPH Collaboration."A measurement of the QCD colour factors and a limit on the light gluino".ZEITSCHRIFT FUR PHYSIK C-PARTICLES AND FIELDS 76.1(1997):1-14.
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