## Evidence of Wγγ Production in pp Collisions at s=8  TeV and Limits on Anomalous Quartic Gauge Couplings with the ATLAS Detector

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Original language English Aad:2015uqa 031802 Physical Review Letters 115 3 https://doi.org/10.1103/PhysRevLett.115.031802 Published - 16 Jul 2015

### 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.

ID: 42327275