Search for t(t)over-bar resonances in fully hadronic final states in pp collisions at root s=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.accessioned2020-11-03T09:24:07Z
dc.date.available2020-11-03T09:24:07Z
dc.date.issued2020-10-09
dc.departmentFakülteler, Mühendislik ve Doğa Bilimleri Fakültesi, Enerji Sistemleri Mühendisliği Bölümüen_US
dc.description.abstractThis paper presents a search for new heavy particles decaying into a pair of top quarks using 139 fb(-1) of proton-proton collision data recorded at a centre-of-mass energy of root s = 13TeV with the ATLAS detector at the Large Hadron Collider. The search is performed using events consistent with pair production of high-transverse-momentum top quarks and their subsequent decays into the fully hadronic final states. The analysis is optimized for resonances decaying into a t (t) over bar pair with mass above 1.4TeV, exploiting a dedicated multivariate technique with jet substructure to identify hadronically decaying top quarks using large-radius jets and evaluating the background expectation from data. No significant deviation from the background prediction is observed. Limits are set on the production cross-section times branching fraction for the new Z' boson in a topcolor-assisted-technicolor model. The Z0 boson masses below 3.9 and 4.7TeV are excluded at 95% confidence level for the decay widths of 1% and 3%, respectively.en_US
dc.description.tableofcontents1 Introduction 1 2 ATLAS detector 2 3 Data and simulation samples 3 4 Event reconstruction and selection 5 4.1 Object reconstruction 5 4.2 Event selection and categorization 7 5 Background estimation 8 5.1 Background modelling using data and simulation 8 5.2 Determination of background parameterization 11 6 Systematic uncertainties 12 6.1 Signal modelling uncertainties 12 6.2 Background modelling uncertainties 14 7 Statistical analysis 15 8 Results 16 9 Conclusion 17 The ATLAS collaboration 24en_US
dc.fullTextLevelFull Texten_US
dc.identifier.doi10.1007/JHEP10(2020)061
dc.identifier.issn1029-8479
dc.identifier.scopus2-s2.0-85092905089en_US
dc.identifier.urihttps://hdl.handle.net/11411/2403
dc.identifier.urihttps://doi.org/10.1007/JHEP10(2020)061
dc.identifier.wosWOS:000579438800001en_US
dc.identifier.wosqualityQ1en_US
dc.indekslendigikaynakWeb of Scienceen_US
dc.indekslendigikaynakScopusen_US
dc.issue10en_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.subjectJet substructureen_US
dc.subjectBeyond Standard Modelen_US
dc.subjectHadron-Hadron scattering (experiments)en_US
dc.subjectHeavy quark productionen_US
dc.subjectJetsen_US
dc.titleSearch for t(t)over-bar resonances in fully hadronic final states in pp collisions at root s=13 TeV with the ATLAS detector
dc.typeArticle

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