Measurement of the branching ratios b -> e nu Chi, mu nu Chi, tau nu Chi, and nu Chi
L3 Collaboration
刊名ZEITSCHRIFT FUR PHYSIK C-PARTICLES AND FIELDS
1996
卷号71期号:3页码:#REF!
学科分类Physics
DOI10.1007/s002880050184
文章类型Article
英文摘要The inclusive semileptonic branching ratios b --> e nu X, mu nu X, tau nu X and nu X have been measured at LEP with the L3 detector. The analysis is based on 2-jet hadronic Z decays obtained in the data collected between 1991 and 1992. Three separate event samples are analysed, containing electrons, muons and large missing energy (neutrinos), respectively. From the electron sample, we measure Br(b --> e nu X) = (10.89+/-0.20+/-0.51)% and, from the muon sample, Br(b --> mu nu X) = (10.82+/-0.15+/-0.59)%, where the first error is statistical and the second is systematic. From the missing energy sample, we measure Br(b --> nu X) = (23.08+/-0.77+/-1.24)%, assuming the relative semileptonic decay rates e:mu:tau = 1:1:(0.25+/-0.05), according to theoretical expectations. From a combined analysis of all three samples and constraining the relative semileptonic rates, we measure Br(b --> e nu X) = Br(b --> mu nu X) = (10.68+/-0.11+/-0.46)%. Alternatively, we can remove the constraint on the relative semileptonic rates and measure Br(b --> tau nu X) = (1.7+/-0.5+/-1.1)%.
类目[WOS]Physics, Particles & Fields
收录类别SCI
WOS记录号WOS:A1996VC87400002
引用统计
被引频次:23[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/311005/227598
专题中国科学院高能物理研究所_粒子天体物理中心_期刊论文
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L3 Collaboration. Measurement of the branching ratios b -> e nu Chi, mu nu Chi, tau nu Chi, and nu Chi[J]. ZEITSCHRIFT FUR PHYSIK C-PARTICLES AND FIELDS,1996,71(3):#REF!.
APA L3 Collaboration.(1996).Measurement of the branching ratios b -> e nu Chi, mu nu Chi, tau nu Chi, and nu Chi.ZEITSCHRIFT FUR PHYSIK C-PARTICLES AND FIELDS,71(3),#REF!.
MLA L3 Collaboration."Measurement of the branching ratios b -> e nu Chi, mu nu Chi, tau nu Chi, and nu Chi".ZEITSCHRIFT FUR PHYSIK C-PARTICLES AND FIELDS 71.3(1996):#REF!.
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