Evidence of $W\gamma \gamma$ production in $pp$ collisions at $\sqrt{s}=8$ TeV and limits on anomalous quartic gauge couplings with the ATLAS detector

Abstract

This Letter reports evidence of triple gauge boson production $pp\to W(\ell \nu )\gamma \gamma +X$, which is accessible for the first time with the 8 TeV LHC data set. The fiducial cross section for this process is measured in a data sample corresponding to an integrated luminosity of 20.3 fb${}^{-1}$, collected by the ATLAS detector in 2012. Events are selected using the $W$ boson decay to $e\nu$ or $\mu \nu$ as well as requiring two isolated photons. The measured cross section is used to set limits on anomalous quartic gauge couplings in the high diphoton mass region.

8 pages plus author list + cover pages (26 pages total), 1 figure, 4 tables, submitted to PRL, All figures including auxiliary figures are available at https://atlas.web.cern.ch/Atlas/GROUPS/PHYSICS/PAPERS/STDM-2013-05

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• Measurement of electroweak-induced production of W gamma with two jets in pp collisions at sqrt(s) = 8 TeV and constraints on anomalous quartic gauge couplings
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• Measurements of the pp to W gamma gamma and pp to Z gamma gamma cross sections and limits on anomalous quartic gauge couplings at sqrt(s) = 8 TeV
• Tri-photon at muon collider: a new process to probe the anomalous quartic gauge couplings
• Probe of the Anomalous Quartic Couplings with Beam Polarization at the CLIC
• Future projections on the anomalous $WW\gamma \gamma$ couplings in hadron-hadron interactions at the FCC-hh
• Neutral Triple Vector Boson Production in Randall-Sundrum Model at the LHC
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• Bounds on anomalous quartic $WWZ\gamma$ couplings in $e^{-}p$ collisions at the FCC-he
• Expected sensitivity on the anomalous quartic neutral gauge couplings in $\gamma \gamma$ collisions at the CLIC
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