Exclusive production of W pairs in CMS

被引：0

作者：

Da Silveira, Gustavo G. ^{[1
]}

机构：

[1] Catholic Univ Louvain, Ctr Cosmol Particle Phys & Phenomenol CP3, Louvain, Belgium

来源：

2ND INTERNATIONAL CONFERENCE ON NEW FRONTIERS IN PHYSICS | 2014年 / 71卷

关键词：

GAMMA CROSS-SECTION; COUPLINGS; LIMITS; BOSONS;

D O I：

10.1051/epjconf/20147100032

中图分类号：

P1 [天文学];

学科分类号：

0704 ;

摘要：

We report the results on the search for exclusive production of W pairs in the LHC with data collected by the Compact Muon Solenoid detector in proton-proton collisions at root s = 7 TeV. The analysis comprises the two-photon production of a W pairs, pp -> pW(+) W- p -> p nu e(+/-)nu mu(-/+) p. Two events are observed in data for p(T)(l) > 4 GeV, vertical bar eta(l)vertical bar < 2.4 and m(mu(+/-)e(-/+)) > 20 GeV, in agreement with the standard model prediction of 2.2 +/- 0.4 signal events with 0.84 +/- 0.15 background events. Moreover, a study of the tail of the lepton pair transverse momentum distribution is performed to search for an evidence of anomalous quartic gauge couplings in the gamma gamma -> W+ W- vertex. As no events are observed in data, it results in a model-independent upper limits for the anomalous quartic gauge couplings a(0,C)(W)/A(2), which are of the order of 10(-4).

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