Measurement of W-pair cross sections in e(+)e(-) interactions at root s=172 GeV and W-decay branching fractions

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	Measurement of W-pair cross sections in e(+)e(-) interactions at root s=172 GeV and W-decay branching fractions
	L3 Collaboration
刊名	PHYSICS LETTERS B
	1997
卷号	407 期号:3-4 页码:#REF!
通讯作者	Acciarri, M (reprint author), RHEIN WESTFAL TH AACHEN, INST PHYS 1, D-52056 AACHEN, GERMANY.
英文摘要	We report on the measurement of W-boson pair-production with the L3 detector at LEP at an average centre-of-mass energy of 172.13 GeV. In a data sample corresponding to a total luminosity of 10.25 pb(-1) we select 110 four-fermion events with pairs of hadronic jets or leptons with high invariant masses. Branching fractions of W decays into different fermion-antifermion pairs are determined with and without the assumption of charged-current lepton universality. The branching fraction for hadronic W decays is measured to be: B(W --> hadrons) = 64.2(-3.8)(+3.7) (stat.) +/- 0.5 (syst.) %. Combining all final states the total cross section for W-pair production is measured to be: sigma(ww) = 12.27(-1.32)(+1.41) (stat.) +/- 0.23 (syst.) pb. The results are in good agreement with the Standard Model. (C) 1997 Elsevier Science B.V.
学科主题	Physics
类目[WOS]	Physics, Multidisciplinary
收录类别	SCI
WOS记录号	WOS:A1997XX54600029
公开日期	2016-05-03
内容类型	期刊论文
源URL	[http://ir.ihep.ac.cn/handle/311005/227634]
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	L3 Collaboration. Measurement of W-pair cross sections in e(+)e(-) interactions at root s=172 GeV and W-decay branching fractions[J]. PHYSICS LETTERS B,1997,407(3-4):#REF!.
APA	L3 Collaboration.(1997).Measurement of W-pair cross sections in e(+)e(-) interactions at root s=172 GeV and W-decay branching fractions.PHYSICS LETTERS B,407(3-4),#REF!.
MLA	L3 Collaboration."Measurement of W-pair cross sections in e(+)e(-) interactions at root s=172 GeV and W-decay branching fractions".PHYSICS LETTERS B 407.3-4(1997):#REF!.