Title
Study of exclusive two-photon production of <tex>$W^{+}W^{-}$</tex> in pp collisions at <tex>$\sqrt{s}=7TeV$</tex> and constraints on anomalous quartic gauge couplings Study of exclusive two-photon production of <tex>$W^{+}W^{-}$</tex> in pp collisions at <tex>$\sqrt{s}=7TeV$</tex> and constraints on anomalous quartic gauge couplings
Author
Faculty/Department
Faculty of Sciences. Physics
Publication type
article
Publication
Bristol ,
Subject
Physics
Source (journal)
Journal of high energy physics. - Bristol
Volume/pages
(2013) :7 , p. 1-44
ISSN
1126-6708
1029-8479
Article Reference
116
Carrier
E-only publicatie
Target language
English (eng)
Full text (Publishers DOI)
Affiliation
University of Antwerp
Abstract
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).
Full text (open access)
https://repository.uantwerpen.be/docman/irua/361171/5569.pdf
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