Measurement of the inclusive and differential t t¯ ? 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.authorYetkin, Elif Aslı
dc.date.accessioned2022-10-25T08:59:47Z
dc.date.available2022-10-25T08:59:47Z
dc.date.issued2022-05
dc.departmentFakülteler, Mühendislik ve Doğa Bilimleri Fakültesi, Enerji Sistemleri Mühendisliği Bölümüen_US
dc.description.abstractAbstract: The 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±??, e+e?, or ?+??). 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¯ ? production process using the lepton+jets final state. [Figure not available: see fulltext.] © 2022, The Author(s).en_US
dc.fullTextLevelFull Texten_US
dc.identifier.doi10.1007/JHEP05(2022)091
dc.identifier.issn1029-8479
dc.identifier.scopus2-s2.0-85130229019en_US
dc.identifier.urihttps://hdl.handle.net/11411/4607
dc.identifier.urihttps://doi.org/10.1007/JHEP05(2022)091
dc.identifier.wosWOS:000797503900001en_US
dc.identifier.wosqualityQ2en_US
dc.indekslendigikaynakWeb of Scienceen_US
dc.indekslendigikaynakScopusen_US
dc.issue5en_US
dc.language.isoenen_US
dc.nationalInternationalen_US
dc.numberofauthors100+en_US
dc.publisherSpringer Science and Business Media Deutschland GmbHen_US
dc.relation.ispartofJournal of High Energy Physicsen_US
dc.relation.publicationcategoryMakale - Uluslararası Hakemli Dergi - Kurum Öğretim Elemanıen_US
dc.rightsinfo:eu-repo/semantics/openAccessen_US
dc.subjectHadron-Hadron Scatteringen_US
dc.subjectTop Physicsen_US
dc.titleMeasurement of the inclusive and differential t t¯ ? cross sections in the dilepton channel and effective field theory interpretation in proton-proton collisions at ?s = 13 TeV
dc.typeArticle
dc.volume2022en_US

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