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Search for $$t\bar{t}H/A \rightarrow t\bar{t}t\bar{t}$$ production in proton–proton collisions at $$\sqrt{s}=13$$ $$\text {TeV}$$ with the ATLAS detector

3Citations signalées — pas une note de qualité
262Institutions déclarées
44Pays d’affiliation déclarés

Résumé fourni par la source

Abstract A search is presented for a heavy scalar ( H ) or pseudo-scalar ( A ) predicted by the two-Higgs-doublet models, where the H / A is produced in association with a top-quark pair $$(t\bar{t}H/A),$$ ( t t ¯ H / A ) , and with the H / A decaying into a $$t\bar{t}$$ t t ¯ pair. The full LHC Run 2 proton–proton collision data collected by the ATLAS experiment is used, corresponding to an integrated luminosity of $$139~\text {fb}^{-1}.$$ 139 fb - 1 . Events are selected requiring exactly one or two opposite-charge electrons or muons. Data-driven corrections are applied to improve the modelling of the $$t\bar{t}$$ t t ¯ +jets background in the regime with high jet and b -jet multiplicities. These include a novel multi-dimensional kinematic reweighting based on a neural network trained using data and simulations. An H / A -mass parameterised graph neural network is trained to optimise the signal-to-background discrimination. In combination with the previous search performed by the ATLAS Collaboration in the multilepton final state, the observed upper limits on the $$t\bar{t}H/A \rightarrow t\bar{t}t\bar{t}$$ t t ¯ H / A → t t ¯ t t ¯ production cross-section at 95% confidence level range between 14 fb and 5.0 fb for an H / A with mass between 400 $$\text {GeV}$$ GeV and 1000 $$\text {GeV}$$ GeV , respectively. Assuming that both the H and A contribute to the $$t\bar{t}t\bar{t}$$ t t ¯ t t ¯ cross-section, $$\tan \beta $$

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DOI retrouvé dans Crossref DOI retrouvé ; titre concordant.

Titre Crossref
Search for $$t\bar{t}H/A \rightarrow t\bar{t}t\bar{t}$$ production in proton–proton collisions at $$\sqrt{s}=13$$ $$\text {TeV}$$ with the ATLAS detector
Date Crossref
26/05/2025
Éditeur
Springer Science and Business Media LLC
Type
journal-article

Ce recoupement confirme des métadonnées liées au DOI. Il ne confirme ni la méthode ni les conclusions de l’étude et ne compte pas comme une seconde source scientifique indépendante.

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Aix-Marseille UniversitéCentre de physique des particules de MarseilleInstitut National de Physique Nucléaire et de Physique des ParticulesUniversity of BergenUniversity of OklahomaNew York UniversityUniversity of GöttingenTU Dortmund UniversityBrookhaven National LaboratorySouthern Methodist UniversityMohammed V UniversityTel Aviv UniversityTechnion – Israel Institute of TechnologyKing's College LondonIstituto Nazionale di Fisica Nucleare, Sezione di TriesteIstituto Nazionale di Fisica Nucleare, Gruppo Collegato di UdineHeidelberg UniversityUniversité Savoie Mont BlancJagiellonian UniversityAGH University of KrakowBrandeis UniversityUniversity of ManchesterNorthern Illinois UniversityIstanbul UniversityRutherford Appleton LaboratoryUniversity of California, Santa CruzUniversity of ChicagoBarcelona Institute of Science and TechnologyInstitute of Science and TechnologyUniversity of PaviaIstituto Nazionale di Fisica Nucleare, Sezione di PaviaJohannes Gutenberg University MainzAlexandru Ioan Cuza UniversityEuropean Organization for Nuclear ResearchAzerbaijan National Academy of SciencesMcGill UniversityRoyal Holloway University of LondonZhengzhou UniversityUniversity of Rome Tor VergataIstituto Nazionale di Fisica Nucleare, Roma Tor VergataUniversitat de ValènciaUniversity of Hassan II CasablancaLund UniversityWaseda UniversityUniversity of BonnBoğaziçi UniversityColumbia UniversityIstituto Nazionale di Fisica Nucleare, Sezione di BolognaUniversity of VictoriaIstituto Nazionale di Fisica Nucleare, Laboratori Nazionali di FrascatiInstitut polytechnique de GrenobleCentre National de la Recherche ScientifiqueUniversité Grenoble AlpesUniversity of EdinburghOklahoma State University Oklahoma CityHoria Hulubei National Institute for R and D in Physics and Nuclear EngineeringFZU ‒ Institute of Physics of the Academy of Sciences of the Czech RepublicNational Technical University of AthensUniversity of GenevaUniversity of WarwickCzech Technical University in PragueLancaster UniversityCalifornia State University SystemUniversity of LiverpoolUniversity of JohannesburgIstituto Nazionale di Fisica Nucleare, Sezione di MilanoUniversité Paris-SaclayUniversity of SussexUniversidad Técnica Federico Santa MaríaUniversity of BirminghamIstituto Nazionale di Fisica Nucleare, Sezione di NapoliConsejo Nacional de Investigaciones Científicas y TécnicasUniversidad Nacional de La PlataUniversity of WashingtonUniversidad Autónoma de MadridUniversidade Federal do Rio de JaneiroLudwig-Maximilians-Universität MünchenUniversity of MichiganUniversity of TorontoLIP - Laboratory of Instrumentation and Experimental Particle PhysicsHigh Energy Accelerator Research OrganizationUniversity of OsloUniversity of SheffieldThe University of Texas at AustinUniversity of GlasgowStockholm UniversityUniversity of MilanNational and Kapodistrian University of AthensLawrence Livermore National LaboratoryIstituto Nazionale di Fisica Nucleare, Sezione di PisaStony Brook UniversityIstituto Nazionale di Fisica Nucleare, Sezione di Roma IThe University of TokyoDeutsches Elektronen-Synchrotron DESYHumboldt-Universität zu BerlinInstitute of Nuclear Physics, Polish Academy of SciencesDuke UniversityUniversité de MontréalUniversity of FreiburgSapienza University of RomeNagoya UniversityOchanomizu UniversityComenius University BratislavaUniversity of California, IrvineUniversity of Cape TownUniversity of Illinois SystemThe Polytechnic University of JapanUniversité Mohammed VI PolytechniqueCalifornia University of PennsylvaniaSlovak Academy of SciencesInstitute of Experimental Physics of the Slovak Academy of SciencesCommissariat à l'Énergie Atomique et aux Énergies AlternativesCEA Paris-SaclayInstitut de Recherche sur les Lois Fondamentales de l'UniversUniversity of ThessalyAristotle University of ThessalonikiCarleton UniversityQueen Mary University of LondonYale UniversityUniversity of BelgradeThe University of Texas at ArlingtonNational Institute for Subatomic PhysicsUniversity of BolognaUniversity of CambridgeUnited Arab Emirates UniversityUniversity of PittsburghThe University of MelbourneIstituto Nazionale di Fisica Nucleare, Sezione di GenovaUniversity of GenoaMax Planck Institute for PhysicsSLAC National Accelerator LaboratoryPalacký University OlomoucUniversity of Science and Technology of ChinaUniversity of OxfordUniversity College LondonChinese Academy of SciencesAn-Najah National UniversityUniversity of British ColumbiaUniversity of SiegenInstituto de Física La PlataInstituto de Física de Buenos AiresUniversité Paris CitéSorbonne UniversitéSorbonne Paris CitéLaboratoire de Physique Nucléaire et de Hautes ÉnergiesTufts UniversityUniversity of BernUniversity of FribourgIstinye UniversityUniversidade do Estado do Rio de JaneiroHarvard University PressUppsala UniversityLawrence Berkeley National LaboratoryLaboratoire AstroParticule et CosmologieCharles UniversityTechnische Universität DresdenUniversity of WürzburgIstituto Nazionale di Fisica Nucleare, Sezione di Roma TreGaziantep UniversityWeizmann Institute of ScienceUniversity of CalabriaUniversité Clermont AuvergneThe Ohio State UniversityUniversity of WuppertalMichigan State UniversitySimon Fraser UniversityJustus-Liebig-Universität GießenUniversity of Chinese Academy of SciencesNanjing UniversityAnkara UniversityIndiana UniversityUniversity of PisaUniversity of CopenhagenWestmont CollegeRadboud University NijmegenUniversitat Autònoma de BarcelonaUniversity of MinhoUniversidad Nacional de ColombiaUniversity of SalentoIstituto Nazionale di Fisica Nucleare, Sezione di LecceUniversidade Federal de Juiz de ForaTbilisi State UniversityArgonne National LaboratoryShanghai Jiao Tong UniversityCollaborative Innovation Center of Quantum MatterTsinghua UniversityChinese University of Hong KongUniversity of ArizonaNational Tsing Hua UniversitySofia University "St. Kliment Ohridski"University of LjubljanaUniversity of UdineUniversity of LisbonParthenope University of NaplesInstitute of Particle PhysicsUniversity of TrentoIstituto Nazionale di Fisica Nucleare, Trento Institute for Fundamental Physics And ApplicationsAcademia SinicaUniversity of Colorado BoulderUniversity of Colorado SystemRoma Tre UniversityPontificia Universidad Católica de ChileMillennium InstituteUniversity of BucharestUniversité Ibn-TofailLouisiana Tech UniversityShandong UniversityThe University of AdelaideCity University of New YorkUniversity of CoimbraUniversity of the Philippines DilimanUniversity of the AegeanUniversidade Federal da BahiaUniversity of SharjahUniversity of the WitwatersrandUniversity of IowaNational Centre of Scientific Research "Demokritos"University of AlbertaCentro Ricerche Enrico FermiWest University of TimişoaraInstitució Catalana de Recerca i Estudis AvançatsUniversity of TsukubaŌtani UniversityTechnical University of MunichThe University of OsakaNational University of Science and TechnologyUniversity of Hong KongYeditepe UniversityIlia State UniversityUniversity of TarapacáYork UniversityKyoto UniversityUniversität InnsbruckIowa State UniversityUniversidad Andrés BelloKobe UniversityHellenic Open UniversityUniversidade de São PauloKTH Royal Institute of TechnologyPeking UniversityHong Kong University of Science and TechnologySun Yat-sen UniversityCentro Nacional de MicroelectrónicaInstitut de Microelectrònica de BarcelonaStellenbosch UniversityUniversité Toulouse III - Paul SabatierUniversité Fédérale de Toulouse Midi-PyrénéesPremier UniversityUniversidad Antonio NariñoThe University of SydneyUniversität HamburgKyushu UniversityTransylvania University of BrașovNational Institute for Research and Development of Isotopic and Molecular TechnologiesBulgarian Academy of SciencesInstitute for Nuclear Research and Nuclear EnergyWashington CollegeUniversity of La SerenaTOBB University of Economics and TechnologyStanford UniversityMongolian Academy of SciencesUniversity of California System

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Sujets associés

Particle physics theoretical and experimental studiesHigh-Energy Particle Collisions ResearchQuantum Chromodynamics and Particle Interactions

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