Pinning down Anomalous $WW\gamma$ Couplings at the LHC

Abstract

We make a careful analysis of $W^{\pm }\gamma$ production at the LHC, identifying the $W^{\pm }$ through leptonic decays, with a view to exploring the sensitivity of the machine to anomalous $CP$-conserving $WW\gamma$ interactions. All the available kinematic variables are used, but we find that the most useful one is the opening angle in the transverse plane between the decay products of the $W^{\pm }$. It is shown that even a simple-minded analysis using this variable can lead to a much greater sensitivity at the LHC than the current constraints on the relevant parameters.

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