Measurement of the tau branching fractions into leptons

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	Measurement of the tau branching fractions into leptons
刊名	PHYSICS LETTERS B
	2001
卷号	507 期号:1--4 页码:47-60
关键词	ANGLE BHABHA SCATTERING LUND MONTE-CARLO RADIATIVE-CORRECTIONS PAIR PRODUCTION L3 EXPERIMENT JET FRAGMENTATION MUON DETECTOR E+E-PHYSICS Z-PEAK DECAYS
通讯作者	Acciarri, M (reprint author), Ist Nazl Fis Nucl, Sez Milano, Via Celoria 16, I-20133 Milan, Italy.
英文摘要	Using data collected with the L3 detector near the Z resonance, corresponding to an integrated luminosity of 150 pb-l, the branching fractions of the tau lepton into electron and muon are measured to be beta(tau --> e<()over bar>(e)nu (tau)) = (17.806 +/- 0.104 (stat.) +/- 0.076 (syst.))%, beta(tau --> mu<()over bar>(mu)nu (tau)) = ( 17.342 +/- 0.110 (stat.) +/- 0.067 (syst.))%. From these results the ratio of the charged current coupling constants of the muon and the electron is determined to be g(mu)/g(e) = 1.0007 +/- 0.0051. Assuming electron-muon universality, the Fermi constant is measured in tau lepton decays as G(F) = (1.1616 +/- 0.0058) x 10(-5) GeV-2. Furthermore, the coupling constant of the strong interaction at the tau mass scale is obtained as alpha (s)(m(tau)(2)) = 0.322 +/- 0.009 (exp.) +/- 0.015 (theory), (C) 2001 Elsevier Science B,V. All rights reserved.
学科主题	Physics
类目[WOS]	Physics, Multidisciplinary
收录类别	SCI
语种	英语
WOS记录号	WOS:000168882000007
公开日期	2016-02-25
内容类型	期刊论文
源URL	[http://ir.ihep.ac.cn/handle/311005/212113]
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	. Measurement of the tau branching fractions into leptons[J]. PHYSICS LETTERS B,2001,507(1--4):47-60.
APA	(2001).Measurement of the tau branching fractions into leptons.PHYSICS LETTERS B,507(1--4),47-60.
MLA	"Measurement of the tau branching fractions into leptons".PHYSICS LETTERS B 507.1--4(2001):47-60.