Measurement of the <mml:math xmlns:mml="http://www.w3.org/1998/Math/MathML" altimg="si1.gif" overflow="scroll"><mml:mi>t</mml:mi><mml:mover accent="true"><mml:mrow><mml:mi>t</mml:mi></mml:mrow><mml:mrow><mml:mo stretchy="false">¯</mml:mo></mml:mrow></mml:mover></mml:math> production cross-section using eμ events with b-tagged jets in pp collisions at <mml:math xmlns:mml="http://www.w3.org/1998/Math/MathML" altimg="si107.gif" overflow="scroll"><mml:msqrt><mml:mi>s</mml:mi></mml:msqrt><mml:mo>=</mml:mo><mml:mn>13</mml:mn><mml:mspace width="0.25em"/><mml:mtext>TeV</mml:mtext></mml:math> with the ATLAS detector
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Post-publication record
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Abstract
This paper describes a measurement of the inclusive top quark pair production cross-section ( σ t t ¯ ) with a data sample of 3.2 fb − 1 of proton–proton collisions at a centre-of-mass energy of s = 13 TeV , collected in 2015 by the ATLAS detector at the LHC. This measurement uses events with an opposite-charge electron–muon pair in the final state. Jets containing b -quarks are tagged using an algorithm based on track impact parameters and reconstructed secondary vertices. The numbers of events with exactly one and exactly two b -tagged jets are counted and used to determine simultaneously σ t t ¯ and the efficiency to reconstruct and b -tag a jet from a top quark decay, thereby minimising the associated systematic uncertainties. The cross-section is measured to be: σ t t ¯ = 818 ± 8 ( stat ) ± 27 ( syst ) ± 19 ( lumi ) ± 12 ( beam ) pb , where the four uncertainties arise from data statistics, experimental and theoretical systematic effects, the integrated luminosity and the LHC beam energy, giving a total relative uncertainty of 4.4%. The result is consistent with theoretical QCD calculations at next-to-next-to-leading order. A fiducial measurement corresponding to the experimental acceptance of the leptons is also presented.
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The record
- Venue
- Physics Letters B
- Topic
- Particle physics theoretical and experimental studies
- Field
- Physics and Astronomy
- Canadian institutions
- —
- Funders
- Institut National de Physique Nucléaire et de Physique des ParticulesH2020 Marie Skłodowska-Curie ActionsHorizon 2020Agencia Nacional de Promoción Científica y TecnológicaFundação para a Ciência e a TecnologiaAustralian Research CouncilJapan Society for the Promotion of ScienceNational Research Center "Kurchatov Institute"Fondation Partager le SavoirServices Fédéraux des Affaires Scientifiques, Techniques et CulturellesGeorgian National Science FoundationBrookhaven National LaboratoryBritish Columbia Knowledge Development FundEuropean Research CouncilMax-Planck-GesellschaftCentre National de la Recherche ScientifiqueMinisterstwo Edukacji i NaukiConselho Nacional de Desenvolvimento Científico e TecnológicoNarodowe Centrum NaukiIsrael Science FoundationBundesministerium für Wissenschaft, Forschung und WirtschaftFonds Québécois de la Recherche sur la Nature et les TechnologiesAustrian Science FundEuropean CommissionLeverhulme TrustFundação de Amparo à Pesquisa do Estado de São PauloGeneralitat de CatalunyaGeneralitat ValencianaInstituto Nazionale di Fisica NucleareUnited States-Israel Binational Science FoundationDepartamento Administrativo de Ciencia, Tecnología e Innovación (COLCIENCIAS)German-Israeli Foundation for Scientific Research and DevelopmentJavna Agencija za Raziskovalno Dejavnost RSScience and Technology Facilities CouncilSchweizerischer Nationalfonds zur Förderung der Wissenschaftlichen ForschungDeutsche ForschungsgemeinschaftChinese Academy of SciencesNederlandse Organisatie voor Wetenschappelijk OnderzoekMinistry of Science and Technology of the People's Republic of ChinaNatural Sciences and Engineering Research Council of CanadaBundesministerium für Bildung und ForschungMinisterio de Economía y CompetitividadMinistry of Education, Culture, Sports, Science and TechnologyAgence Nationale de la RechercheStichting voor Fundamenteel Onderzoek der MaterieDepartment of Science and Technology, Ministry of Science and Technology, IndiaGeneral Secretariat for Research and TechnologyAmerican Roentgen Ray SocietyEuropean Social FundCentre National pour la Recherche Scientifique et TechniqueRoyal SocietyCompute CanadaNational Science FoundationAlexander von Humboldt-StiftungTRIUMFComisión Nacional de Investigación Científica y TecnológicaTürkiye Atom Enerjisi KurumuJoint Institute for Nuclear ResearchArizona-Nevada Academy of ScienceCanarieSeventh Framework ProgrammePoultry Industry CouncilCERNNational Natural Science Foundation of ChinaIsraeli Centers for Research ExcellenceU.S. Department of EnergyOntario Innovation TrustDanmarks Grundforskningsfond
- Keywords
- PhysicsParticle physicsMuonLarge Hadron ColliderQuantum chromodynamicsLeptonAlgorithmQuarkLuminosityNuclear physicsElectronGalaxyComputer science
- Has abstract in OpenAlex
- yes