Evidence for exclusive gamma gamma -> W (+) W (-) production and constraints on anomalous quartic gauge couplings in pp collisions at and 8 TeV

doi:10.1007/jhep08(2016)119

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	Evidence for exclusive gamma gamma -> W (+) W (-) production and constraints on anomalous quartic gauge couplings in pp collisions at and 8 TeV
	CMS Collaboration
	2016
发表期刊	JOURNAL OF HIGH ENERGY PHYSICS (IF:6.063[JCR-2016],4.992[5-Year])
ISSN	1029-8479
卷号	2016 期号:8 页码:119
文章类型	Article
摘要	A search for exclusive or quasi-exclusive gamma gamma -> W (+) W (-) production, via pp -> p (()) W (+) W (-) p (()) -> p (()) mu (+/-)e(a") p (()) at TeV, is reported using data corresponding to an integrated luminosity of 19.7 fb(-1). Events are selected by requiring the presence of an electron-muon pair with large transverse momentum p (T)(mu (+/-)e(a")) > 30 GeV, and no associated charged particles detected from the same vertex. The 8 TeV results are combined with the previous 7 TeV results (obtained for 5.05 fb(-1) of data). In the signal region, 13 (2) events are observed over an expected background of 3.9 +/- 0.6 (0.84 +/- 0.15) events for 8 (7) TeV, resulting in a combined excess of 3.4 sigma over the background-only hypothesis. The observed yields and kinematic distributions are compatible with the standard model prediction for exclusive and quasi-exclusive gamma gamma -> W (+) W (-) production. Upper limits on the anomalous quartic gauge coupling operators a (0,C) (W) (dimension-6) and f (M0,1,2,3) (dimension-8), the most stringent to date, are derived from the measured dilepton transverse momentum spectrum.
关键词	Forward physics Hadron-Hadron scattering (experiments)
DOI	10.1007/jhep08(2016)119
关键词[WOS]	CROSS-SECTION ; HADRON COLLIDERS ; BOSON COUPLINGS ; HIGH-ENERGIES ; LHC ; LIMITS ; EVENT ; LEP
收录类别	SCI
语种	英语
WOS记录号	WOS:000382661100001
INSPIRE ID	1448100
引用统计	正在获取... 被引频次：99 [INSPIRE]
文献类型	期刊论文
条目标识符	https://ir.ihep.ac.cn/handle/311005/260738
专题	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. Evidence for exclusive gamma gamma -> W (+) W (-) production and constraints on anomalous quartic gauge couplings in pp collisions at and 8 TeV[J]. JOURNAL OF HIGH ENERGY PHYSICS,2016,2016(8):119.
APA	CMS Collaboration.(2016).Evidence for exclusive gamma gamma -> W (+) W (-) production and constraints on anomalous quartic gauge couplings in pp collisions at and 8 TeV.JOURNAL OF HIGH ENERGY PHYSICS,2016(8),119.
MLA	CMS Collaboration."Evidence for exclusive gamma gamma -> W (+) W (-) production and constraints on anomalous quartic gauge couplings in pp collisions at and 8 TeV".JOURNAL OF HIGH ENERGY PHYSICS 2016.8(2016):119.