Exclusive production of $W$ pairs in CMS
(2014) EPJ Web of Conferences — Vol. 71, p. 32 (2014)
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- 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 s**(1/2) = 7 TeV. The analysis comprises the two-photon production of a W pairs, pp -> pW^+ W^- p -> p nue^+- numu^∓ p. Two events are observed in data for p_T(l) > 4 GeV, |eta(l)| 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 gammagamma -> W^+ W^- vertex. As no events are observed in data, it results in a model-independent upper limits for the anomalous W quartic gauge couplings a^W_0,C/Lambda^2, which are of the order of 10^-4.
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Da Silveira, G. G. (2014). Exclusive production of $W$ pairs in CMS. EPJ Web of Conferences, 71, 32. https://doi.org/10.1051/epjconf/20147100032 (Original work published 2014)