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Search for W W γand W Z γproduction and constraints on anomalous quartic gauge couplings in p

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Abstract:

A search for $WV\ensuremath{\gamma}$ 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 $19.3\text{ }\text{ }{\mathrm{fb}}^{\ensuremath{-}1}$ collected in 2012 with the CMS detector at the LHC in $pp$ collisions at $\sqrt{s}=8\text{ }\text{ }\mathrm{TeV}$. An upper limit of 311 fb on the cross section for the $WV\ensuremath{\gamma}$ 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 $WW\ensuremath{\gamma}\ensuremath{\gamma}$ or $WWZ\ensuremath{\gamma}$ 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 $WWZ\ensuremath{\gamma}$ parameters ${\ensuremath{\kappa}}_{0}^{W}$ and ${\ensuremath{\kappa}}_{C}^{W}$. Limits are also obtained for the $WW\ensuremath{\gamma}\ensuremath{\gamma}$ parameters ${a}_{0}^{W}$ and ${a}_{C}^{W}$.

Tópico:

Particle physics theoretical and experimental studies

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Citations: 51
51

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Información de la Fuente:

FuentePhysical review. D. Particles, fields, gravitation, and cosmology/Physical review. D, Particles, fields, gravitation, and cosmology
Cuartil año de publicaciónNo disponible
Volumen90
Issue3
Páginas032008 - N/A
pISSNNo disponible
ISSN1550-2368

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