Measurement of the inclusive and differential t t¯ γ cross sections in the dilepton channel and effective field theory interpretation in proton-proton collisions at √s = 13 TeV

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dc.contributor.authorTumasyan, A.
dc.contributor.authorAdam, W.
dc.contributor.authorAndrejkovic, J.W.
dc.contributor.authorBergauer, T.
dc.contributor.authorChatterjee, S.
dc.contributor.authorDamanakis, K.
dc.contributor.authorDragicevic, M.
dc.date.accessioned2025-03-23T19:16:32Z
dc.date.available2025-03-23T19:16:32Z
dc.date.issued2022
dc.departmentSinop Üniversitesi
dc.description.abstractThe production cross section of a top quark pair in association with a photon is measured in proton-proton collisions in the decay channel with two oppositely charged leptons (e±μ∓, e+e−, or μ+μ−). The measurement is performed using 138 fb−1 of proton-proton collision data recorded by the CMS experiment at s = 13 TeV during the 2016–2018 data-taking period of the CERN LHC. A fiducial phase space is defined such that photons radiated by initial-state particles, top quarks, or any of their decay products are included. An inclusive cross section of 175.2 ± 2.5(stat) ± 6.3(syst) fb is measured in a signal region with at least one jet coming from the hadronization of a bottom quark and exactly one photon with transverse momentum above 20 GeV. Differential cross sections are measured as functions of several kinematic observables of the photon, leptons, and jets, and compared to standard model predictions. The measurements are also interpreted in the standard model effective field theory framework, and limits are found on the relevant Wilson coefficients from these results alone and in combination with a previous CMS measurement of the tt¯ γ production process using the lepton+jets final state. [Figure not available: see fulltext.] © 2022, The Author(s).
dc.description.sponsorshipHorizon 2020 Framework Programme, H2020, (824093, 758316, 884104, 675440, 765710, 724704, 752730)
dc.description.sponsorshipHorizon 2020 Framework Programme, H2020
dc.identifier.doi10.1007/JHEP05(2022)091
dc.identifier.issn1029-8479
dc.identifier.issue5
dc.identifier.scopus2-s2.0-85130229019
dc.identifier.scopusqualityQ1
dc.identifier.urihttps://doi.org/10.1007/JHEP05(2022)091
dc.identifier.urihttps://hdl.handle.net/11486/4118
dc.identifier.volume2022
dc.indekslendigikaynakScopus
dc.language.isoen
dc.publisherSpringer Science and Business Media Deutschland GmbH
dc.relation.ispartofJournal of High Energy Physics
dc.relation.publicationcategoryMakale - Uluslararası Hakemli Dergi - Kurum Öğretim Elemanı
dc.rightsinfo:eu-repo/semantics/openAccess
dc.snmzKA_Scopus_20250323
dc.subjectHadron-Hadron Scattering
dc.subjectTop Physics
dc.titleMeasurement of the inclusive and differential t t¯ γ cross sections in the dilepton channel and effective field theory interpretation in proton-proton collisions at √s = 13 TeV
dc.typeArticle

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