Measurement of W±γ differential cross sections in proton-proton collisions at s =13 TeV and effective field theory constraints

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dc.date.accessioned2022-05-01T16:34:38Z
dc.date.accessioned2022-12-20T03:51:41Z
dc.date.available2022-05-01T16:34:38Z
dc.date.available2022-12-20T03:51:41Z
dc.date.created2022-05-01T16:34:38Z
dc.date.issued2022-03-01
dc.identifierPhysical Review D, v. 105, n. 5, 2022.
dc.identifier2470-0029
dc.identifier2470-0010
dc.identifierhttp://hdl.handle.net/11449/234351
dc.identifier10.1103/PhysRevD.105.052003
dc.identifier2-s2.0-85127560044
dc.identifier.urihttps://repositorioslatinoamericanos.uchile.cl/handle/2250/5414453
dc.description.abstractDifferential 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.
dc.languageeng
dc.relationPhysical Review D
dc.sourceScopus
dc.titleMeasurement of W±γ differential cross sections in proton-proton collisions at s =13 TeV and effective field theory constraints
dc.typeArtículos de revistas


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