Measurement of W gamma and Z gamma production in pp collisions at root s=7 TeV

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	Measurement of W gamma and Z gamma production in pp collisions at root s=7 TeV
	CMS Collaboration
刊名	PHYSICS LETTERS B
	2011
卷号	701 期号:5 页码:535-555
关键词	GAUGE-BOSON COUPLINGS HADRON COLLIDERS AMPLITUDES ZEROS E(+)E(-) SECTOR LIMITS LEP
通讯作者	Tenchini, R (reprint author), Ist Nazl Fis Nucl, Sez Pisa, Pisa, Italy.
英文摘要	A measurement of W gamma and Z gamma production in proton-proton collisions at root s = 7 TeV is presented. Results are based on a data sample recorded by the CMS experiment at the LHC, corresponding to an integrated luminosity of 36 pb(-1). The electron and muon decay channels of the W and Z are used. The total cross sections are measured for photon transverse energy E-T(gamma) > 10 GeV and spatial separation from charged leptons in the plane of pseudorapidity and azimuthal angle Delta R(l.gamma) > 0.7, and with an additional dilepton invariant mass requirement of M-ll > 50 GeV for the Z gamma process. The following cross section times branching fraction values are found: sigma(pp -> W gamma + X) x B(W -> lv) = 56.3 +/- 5.0(stat.) +/- 5.0(syst.) +/- 2.3(lumi.) pb and sigma(pp -> Z gamma + X) x B(Z -> ll) = 9.4 +/- 1.0(stat.) +/- 0.6(syst.) +/- 0.4(lumi.) pb. These measurements are in agreement with standard model predictions. The first limits on anomalous WW gamma, ZZ gamma, and Z gamma gamma trilinear gauge couplings at root s = 7 TeV are set. (C) 2011 CERN. Published by Elsevier 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:000293438100005
公开日期	2016-02-25
内容类型	期刊论文
源URL	[http://ir.ihep.ac.cn/handle/311005/213092]
专题	高能物理研究所_粒子天体物理中心
作者单位	中国科学院高能物理研究所
推荐引用方式 GB/T 7714	CMS Collaboration. Measurement of W gamma and Z gamma production in pp collisions at root s=7 TeV[J]. PHYSICS LETTERS B,2011,701(5):535-555.
APA	CMS Collaboration.(2011).Measurement of W gamma and Z gamma production in pp collisions at root s=7 TeV.PHYSICS LETTERS B,701(5),535-555.
MLA	CMS Collaboration."Measurement of W gamma and Z gamma production in pp collisions at root s=7 TeV".PHYSICS LETTERS B 701.5(2011):535-555.