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Study of exclusive two-photon production of W+W- in pp collisions at root s=7 TeV and constraints on anomalous quartic gauge couplings
CMS Collaboration
2013
发表期刊JOURNAL OF HIGH ENERGY PHYSICS
期号7
通讯作者Chatrchyan, S (reprint author), Yerevan Phys Inst, Yerevan 375036, Armenia.
摘要A search for exclusive or quasi-exclusive W+W- production by photon-photon interactions, pp -> p(*)W(+)W(-)p(*), at \/s = 7 TeV is reported using data collected by the CMS detector with an integrated luminosity of 5.05 fb(-1). Events are selected by requiring a mu(+/-)mu(-/+) vertex with no additional associated charged tracks and dilepton transverse momentum p(T)(mu(+/-)mu(-/+)) > 30 GeV. Two events passing all selection requirements are observed in the data, compared to a standard model expectation of 2.2 +/- 0.4 signal events with 0.84 +/- 0.15 background. The tail of the dilepton p(T) distribution is studied for deviations from the standard model. No events are observed with p(T) > 100 GeV. Model-independent upper limits are computed and compared to predictions involving anomalous quartic gauge couplings. The limits on the parameters a(0,c)(W)/A(2) with a dipole form factor and an energy cutoff A(cutoff) = 500 GeV are of the order of 10(-4).
关键词GAMMA CROSS-SECTION BOSON COUPLINGS HIGH-ENERGIES SEARCH LIMITS LHC LEP
学科领域Physics
DOI10.1007/JHEP07(2013)116
收录类别SCI
语种英语
WOS类目Physics, Particles & Fields
WOS记录号WOS:000323202900029
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被引频次:19[WOS]   [WOS记录]     [WOS相关记录]
文献类型期刊论文
条目标识符http://ir.ihep.ac.cn/handle/311005/213584
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
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CMS Collaboration. Study of exclusive two-photon production of W+W- in pp collisions at root s=7 TeV and constraints on anomalous quartic gauge couplings[J]. JOURNAL OF HIGH ENERGY PHYSICS,2013(7).
APA CMS Collaboration.(2013).Study of exclusive two-photon production of W+W- in pp collisions at root s=7 TeV and constraints on anomalous quartic gauge couplings.JOURNAL OF HIGH ENERGY PHYSICS(7).
MLA CMS Collaboration."Study of exclusive two-photon production of W+W- in pp collisions at root s=7 TeV and constraints on anomalous quartic gauge couplings".JOURNAL OF HIGH ENERGY PHYSICS .7(2013).
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