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

Understand

A measurement of electroweak-induced production of W gamma and two jets is performed, where the W boson decays leptonically.

• The data used in the analysis correspond to an integrated luminosity of 19.7 inverse femtobarns collected by the CMS experiment in sqrt(s) = 8 TeV proton-proton collisions produced at the LHC.
• Candidate events are selected with exactly one muon or electron, missing transverse momentum, one photon, and two jets with large rapidity separation.
• An excess over the hypothesis of the standard model without electroweak production of W gamma with two jets is observed with a significance of 2.7 standard deviations.