Tumasyan, A.Işıldak, Bora2023-07-212023-07-212022-03-092470-0010http://hdl.handle.net/10679/8522https://doi.org/10.1103/PhysRevD.105.052003Differential cross section measurements of W±γ production in proton-proton collisions at s=13 TeV are presented. The data set used in this study was collected with the CMS detector at the CERN LHC in 2016-2018 with an integrated luminosity of 138 fb-1. Candidate events containing an electron or muon, a photon, and missing transverse momentum are selected. The measurements are compared with standard model predictions computed at next-to-leading and next-to-next-to-leading orders in perturbative quantum chromodynamics. Constraints on the presence of TeV-scale new physics affecting the WWγ vertex are determined within an effective field theory framework, focusing on the O3W operator. A simultaneous measurement of the photon transverse momentum and the azimuthal angle of the charged lepton in a special reference frame is performed. This two-dimensional approach provides up to a factor of ten more sensitivity to the interference between the standard model and the O3W contribution than using the transverse momentum alone.engAttribution 4.0 InternationalopenAccesshttp://creativecommons.org/licenses/by/4.0/article105500077094840000110.1103/PhysRevD.105.0520032-s2.0-85127560044