Measurements of inclusive and differential cross-sections of combined tt<mml:mo stretchy="true"><overbar></mml:mover>gamma and <it>tW gamma</it> production in the <it>e mu</it> channel at 13 TeV with the ATLAS detector

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dc.WoS.categoriesPhysics, Particles & Fieldsen_US
dc.authorid0000-0001-5050-8441en_US
dc.contributor.authorÇetin, Serkant Ali
dc.date.accessioned2020-11-06T07:17:18Z
dc.date.available2020-11-06T07:17:18Z
dc.date.issued2020-09-07
dc.departmentFakülteler, Mühendislik ve Doğa Bilimleri Fakültesi, Enerji Sistemleri Mühendisliği Bölümüen_US
dc.description47 pagesen_US
dc.description.abstractInclusive and differential cross-sections for the production of top quarks in association with a photon are measured with proton-proton collision data corresponding to an integrated luminosity of 139 fb(-1). The data were collected by the ATLAS detector at the LHC during Run 2 between 2015 and 2018 at a centre-of-mass energy of 13 TeV. The measurements are performed in a fiducial volume defined at parton level. Events with exactly one photon, one electron and one muon of opposite sign, and at least two jets, of which at least one is b-tagged, are selected. The fiducial cross-section is measured to be 39.6-2.3+2.7 fb. Differential cross-sections as functions of several observables are compared with state-of-the-art Monte Carlo simulations and next-to-leading-order theoretical calculations. These include cross-sections as functions of photon kinematic variables, angular variables related to the photon and the leptons, and angular separations between the two leptons in the event. All measurements are in agreement with the predictions from the Standard Model.en_US
dc.description.tableofcontents1 Introduction 1 2 ATLAS detector 2 3 Signal and background modelling 3 4 Event selection 6 5 Analysis strategy 8 5.1 Fiducial region de nition 9 5.2 Fiducial inclusive cross-section 10 5.3 Absolute and normalised di erential cross-sections 11 6 Systematic uncertainties 13 6.1 Experimental uncertainties 13 6.2 Signal and background modelling uncertainties 14 6.3 Treatment of the systematic uncertainties in the measurements 15 7 Fiducial inclusive cross-section measurement 16 8 Di erential cross-section measurements 19 9 Conclusions 20 The ATLAS collaboration 30en_US
dc.fullTextLevelFull Texten_US
dc.identifier.doi10.1007/JHEP09(2020)049
dc.identifier.issn1029-8479
dc.identifier.scopus2-s2.0-85090330843en_US
dc.identifier.urihttps://hdl.handle.net/11411/2478
dc.identifier.urihttps://doi.org/10.1007/JHEP09(2020)049
dc.identifier.wosWOS:000570902100005en_US
dc.identifier.wosqualityQ1en_US
dc.indekslendigikaynakWeb of Scienceen_US
dc.indekslendigikaynakScopusen_US
dc.issue9en_US
dc.language.isoenen_US
dc.nationalInternationalen_US
dc.numberofauthors1000+en_US
dc.publisherSpringeren_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.subjectTop physicsen_US
dc.subjectHadron-Hadron scattering (experiments)en_US
dc.titleMeasurements of inclusive and differential cross-sections of combined tt<mml:mo stretchy="true"><overbar></mml:mover>gamma and <it>tW gamma</it> production in the <it>e mu</it> channel at 13 TeV with the ATLAS detector
dc.typeArticle

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