Abstract

A fiducial cross section for Wγ production in proton-proton collisions is measured at a center-of-mass energy of 13TeV in 137 fb^{-1} of data collected using the CMS detector at the LHC. The W→eν and μν decay modes are used in a maximum-likelihood fit to the lepton-photon invariant mass distribution to extract the combined cross section. The measured cross section is compared with theoretical expectations at next-to-leading order in quantum chromodynamics. In addition, 95%confidence level intervals are reported for anomalous triple-gauge couplings within the framework of effective field theory.

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