Search for WWγ and WZγ Production and Constraints on Anomalous Quartic Gauge Couplings in pp Collisions at √s = 8 TeV
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Chatrchyan-2014-Search for WWy.pdf
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Author(s)
Apyan, Aram
Busza, Wit
Cali, Ivan Amos
Chan, M.
Di Matteo, Leonardo
Gomez-Ceballos, Guillelmo
Goncharov, Maxim
Gulhan, Doga Can
Klute, Markus
Lai, Yue Shi
Date Issued
August 2014
Journal
Physical Review D
Publisher
American Physical Society
Citation
Chatrchyan, S., V. Khachatryan, A. M. Sirunyan, A. Tumasyan, W. Adam, T. Bergauer, M. Dragicevic, et al. “Search for WWγ and WZγ Production and Constraints on Anomalous Quartic Gauge Couplings in pp Collisions at √s = 8 TeV.” Phys. Rev. D 90, no. 3 (August 2014). © 2014 CERN, for the CMS Collaboration
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Final published version
Abstract
A search for WVγ triple vector boson production is presented based on events containing a W boson decaying to a muon or an electron and a neutrino, a second V (W or Z) boson, and a photon. The data correspond to an integrated luminosity of 19.3 fb[superscript −1] collected in 2012 with the CMS detector at the LHC in pp collisions at √s = 8 TeV. An upper limit of 311 fb on the cross section for the WVγ production process is obtained at 95% confidence level for photons with a transverse energy above 30 GeV and with an absolute value of pseudorapidity of less than 1.44. This limit is approximately a factor of 3.4 larger than the standard model predictions that are based on next-to-leading order QCD calculations. Since no evidence of anomalous WWγγ or WWZγ quartic gauge boson couplings is found, this paper presents the first experimental limits on the dimension-eight parameter f[subscript T,0] and the CP-conserving WWZγ parameters κ[W over 0] and κ[W over C]. Limits are also obtained for the WWγγ parameters a[W over 0] and a[W over C].
MIT Department
Massachusetts Institute of Technology. Department of Physics
Massachusetts Institute of Technology. Laboratory for Nuclear Science
Massachusetts Institute of Technology. School of Science
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DOI of Published Version
https://doi.org/10.1103/PhysRevD.90.032008
