A search for W V gamma 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^{-1} collected in 2012 with the CMS detector at the LHC in pp collisions at sqrt(s) = 8  TeV. An upper limit of 311 fb on the cross section for the W V gamma 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 W W gamma gamma or W W Z gamma quartic gauge boson couplings is found, this paper presents the first experimental limits on the dimension-eight parameter f_{T,0} and the CP-conserving W W Z gamma parameters k^{W}_{0} and k^{W}_{C}. Limits are also obtained for the W W gamma gamma parameters a^{W}_{0} and a^{W}_{C}.

Search for W W gamma and W Z gamma production and constraints on anomalous quartic gauge couplings in pp collisions at sqrt(s) = 8  TeV / S. Chatrchyan, V. Khachatryan, A. M. Sirunyan, A. Tumasyan, W. Adam, T. Bergauer, M. Dragicevic, J. Ero, C. Fabjan, M. Friedl, R. Fruhwirth, V. M. Ghete, C. Hartl, N. Hormann, J. Hrubec, M. Jeitler, W. Kiesenhofer, V. Knunz, M. Krammer, I. Kratschmer, et al.. - In: PHYSICAL REVIEW D, PARTICLES, FIELDS, GRAVITATION, AND COSMOLOGY. - ISSN 1550-7998. - STAMPA. - 90:032008:(2014), pp. 1-20. [10.1103/PhysRevD.90.032008]

Search for W W gamma and W Z gamma production and constraints on anomalous quartic gauge couplings in pp collisions at sqrt(s) = 8  TeV

CIULLI, VITALIANO;D'ALESSANDRO, RAFFAELLO;FOCARDI, ETTORE;GONZI, SANDRO;GORI, VALENTINA;LENZI, PIERGIULIO;TROPIANO, ANTONIO;
2014

Abstract

A search for W V gamma 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^{-1} collected in 2012 with the CMS detector at the LHC in pp collisions at sqrt(s) = 8  TeV. An upper limit of 311 fb on the cross section for the W V gamma 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 W W gamma gamma or W W Z gamma quartic gauge boson couplings is found, this paper presents the first experimental limits on the dimension-eight parameter f_{T,0} and the CP-conserving W W Z gamma parameters k^{W}_{0} and k^{W}_{C}. Limits are also obtained for the W W gamma gamma parameters a^{W}_{0} and a^{W}_{C}.
2014
90:032008
1
20
S. Chatrchyan; V. Khachatryan; A. M. Sirunyan; A. Tumasyan; W. Adam; T. Bergauer; M. Dragicevic; J. Ero; C. Fabjan; M. Friedl; R. Fruhwirth; V. M. Ghe...espandi
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Utilizza questo identificatore per citare o creare un link a questa risorsa: https://hdl.handle.net/2158/891148
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