Measurement of the W+W-gamma cross section and direct limits on anomalous quartic gauge boson couplings at LEP

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	Measurement of the W+W-gamma cross section and direct limits on anomalous quartic gauge boson couplings at LEP
刊名	PHYSICS LETTERS B
	2000
卷号	490 期号:3--4 页码:187-195
关键词	MONTE-CARLO PROGRAM PAIR PRODUCTION MISSING ENERGY MUON DETECTOR L3 EXPERIMENT CONSTRUCTION CALORIMETER COLLIDERS SINGLE
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	The process e(+)e(-)-->W(+)W(-)gamma is analysed using the data collected with the L3 detector at LEP at a centre-of-mass energy of 188.6 GeV, corresponding to an integrated luminosity of 176.8 pb(-1). Based on a sample of 42 selected W+W- candidates containing an isolated hard photon, the W(+)W(-)gamma cross section, defined within phase-space cuts, is measured to be: sigma(WW gamma) = 290 +/- 80 +/- 16 fb, consistent with the Standard Model expectation. Including the process e(+)c(-)-->upsilon<(upsilon)over bar>gamma gamma, limits are derived on anomalous contributions to the Standard Model quartic vertices W(+)W(-)gamma gamma and W(+)W(-)Z gamma at 95% CL: -0.043 GeV-2 < a(0)/Lambda(2) < 0.043 GeV-2, -0.08 GeV-2 < a(c)/Lambda(2) < 0.13 GeV-2, -0.41 GeV-2 < a(n)/Lambda(2) < 0.37 GeV-2. (C) 2000 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:000089749000001
公开日期	2016-02-25
内容类型	期刊论文
源URL	[http://ir.ihep.ac.cn/handle/311005/212075]
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 W+W-gamma cross section and direct limits on anomalous quartic gauge boson couplings at LEP[J]. PHYSICS LETTERS B,2000,490(3--4):187-195.
APA	(2000).Measurement of the W+W-gamma cross section and direct limits on anomalous quartic gauge boson couplings at LEP.PHYSICS LETTERS B,490(3--4),187-195.
MLA	"Measurement of the W+W-gamma cross section and direct limits on anomalous quartic gauge boson couplings at LEP".PHYSICS LETTERS B 490.3--4(2000):187-195.