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Search for displaced decays of long-lived particles in events with missing transverse momentum in $$ \sqrt{s}=13 $$ TeV pp collisions with the ATLAS detector

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270Institutions déclarées
45Pays d’affiliation déclarés

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A bstract A search for long-lived particles in events with significant missing transverse momentum and at least one displaced vertex is presented. This analysis is performed using 137 fb −1 of pp collision data collected between 2016–2018 during Run 2 of the Large Hadron Collider by the ATLAS detector. Displaced vertices are identified using two different secondary vertexing algorithms, including a novel “fuzzy” vertexing algorithm optimized for identifying displaced decays of heavy quarks. Separate searches are performed using each algorithm, and the expected Standard Model background is independently estimated for each search using a data-driven procedure. No significant excess is observed over the background in either case. The results are used to set 95% confidence-level limits on potential beyond-the-Standard Model physics that could produce this final state. Results are interpreted in the context of four models: long-lived gluinos that form R -hadrons before decaying, neutralinos decaying via Higgs-mediated channels in the Bino-Wino coannihilation model, long-lived Higgsinos decaying to axinos, and an exotic Higgs portal model predicting displaced decays of light pseudoscalars.

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DOI retrouvé dans Crossref DOI retrouvé ; titre concordant.

Titre Crossref
Search for displaced decays of long-lived particles in events with missing transverse momentum in $$ \sqrt{s}=13 $$ TeV pp collisions with the ATLAS detector
Date Crossref
03/08/2026
Éditeur
Springer Science and Business Media LLC
Type
journal-article

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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 UniversityKing'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 KrakowSLAC National Accelerator LaboratoryUniversity of ManchesterNorthern Illinois UniversityIstanbul UniversityRutherford Appleton LaboratoryUniversity of California, Santa CruzUniversity of ChicagoBarcelona Institute of Science and TechnologyInstitute of Science and TechnologyJohannes Gutenberg University MainzAlexandru Ioan Cuza UniversityKhalifa University of Science and TechnologyAzerbaijan National Academy of SciencesUniversitat de ValènciaRoyal Holloway University of LondonZhengzhou UniversityUniversity of Rome Tor VergataIstituto Nazionale di Fisica Nucleare, Roma Tor VergataLund UniversityWaseda UniversityUniversity of BonnUniversity of WürzburgIstituto Nazionale di Fisica Nucleare, Sezione di BolognaUniversity of VictoriaUniversity of BernIstituto Nazionale di Fisica Nucleare, Laboratori Nazionali di FrascatiUniversity of EdinburghOklahoma State University Oklahoma CityEuropean Organization for Nuclear ResearchHoria 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 PragueIslamic UniversityLancaster UniversityCalifornia State University SystemUniversity of LiverpoolUniversity of JohannesburgIstituto Nazionale di Fisica Nucleare, Sezione di MilanoCentre National de la Recherche ScientifiqueUniversité Paris-SaclayLaboratoire de Physique des 2 Infinis Irène Joliot-CurieUniversity of SussexThe University of AdelaideIstituto Nazionale di Fisica Nucleare, Sezione di NapoliConsejo Nacional de Investigaciones Científicas y TécnicasUniversidad Nacional de La PlataUniversity of WashingtonUniversidade Federal do Rio de JaneiroMcGill UniversityUniversité Paris CitéSorbonne UniversitéSorbonne Paris CitéLaboratoire de Physique Nucléaire et de Hautes ÉnergiesUniversity of FreiburgUniversity of TorontoAristotle University of ThessalonikiHigh Energy Accelerator Research OrganizationUniversity of SheffieldThe University of Texas at AustinUniversity of GlasgowUniversity of MilanNational and Kapodistrian University of AthensColumbia UniversityIstituto Nazionale di Fisica Nucleare, Sezione di PisaStony Brook UniversityIstituto Nazionale di Fisica Nucleare, Sezione di Roma IThe University of TokyoDeutsches Elektronen-Synchrotron DESYInstituto de Física La PlataInstituto de Física de Buenos AiresBrandeis UniversityInstitute of Nuclear Physics, Polish Academy of SciencesDuke UniversityUniversité de MontréalSapienza University of RomeNagoya UniversityA. Alikhanyan National LaboratoryPremier UniversityComenius University BratislavaUniversity of California, IrvineUniversity of Cape TownThe Polytechnic University of JapanUniversité Mohammed VI PolytechniqueCalifornia University of PennsylvaniaUniversité Clermont AuvergneQueen Mary University of LondonSlovak 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 ThessalyCarleton UniversityTechnische Universität DresdenUniversity of MichiganHumboldt-Universität zu BerlinYale UniversityThe University of Texas at ArlingtonUniversity of BolognaUniversity of OxfordUnited Arab Emirates UniversityUniversity of PittsburghThe University of MelbourneUniversity of California SystemNational Institute for Subatomic PhysicsMax Planck Institute for PhysicsCharles UniversityUniversity of Science and Technology of ChinaUniversity College LondonUniversidad Autónoma de MadridChinese Academy of SciencesLIP - Laboratory of Instrumentation and Experimental Particle PhysicsAn-Najah National UniversityUniversity of British ColumbiaTufts UniversityUniversity of FribourgIstinye UniversityUniversity of BelgradeUniversidade do Estado do Rio de JaneiroIndiana UniversityUniversity of BirminghamUniversity of Hassan II CasablancaUppsala UniversityLawrence Berkeley National LaboratoryLaboratoire AstroParticule et CosmologieUniversity of WuppertalLudwig-Maximilians-Universität MünchenIstituto Nazionale di Fisica Nucleare, Sezione di Roma TreGaziantep UniversityUniversity of CambridgeUniversity of SiegenIstituto Nazionale di Fisica Nucleare, Sezione di GenovaUniversity of GenoaThe Ohio State UniversityWeizmann Institute of ScienceMichigan State UniversityYork UniversityHarvard University PressStockholm UniversityUniversité Toulouse III - Paul SabatierUniversité Fédérale de Toulouse Midi-PyrénéesUniversity of Illinois SystemUniversity of Chinese Academy of SciencesNanjing UniversityAnkara UniversityUniversity of CopenhagenUniversity of CalabriaWestmont CollegeRadboud University NijmegenUniversidad Técnica Federico Santa MaríaUniversity of PaviaIstituto Nazionale di Fisica Nucleare, Sezione di PaviaUniversitat Autònoma de BarcelonaUniversity of MinhoUniversity of OsloPalacký University OlomoucUniversidade Federal de Juiz de ForaUniversity of SienaTbilisi State UniversityArgonne National LaboratorySimon Fraser UniversityShanghai Jiao Tong UniversityInstitut polytechnique de GrenobleUniversité Grenoble AlpesKyoto UniversityCollaborative Innovation Center of Quantum MatterTsinghua UniversityChinese University of Hong KongUniversity of ArizonaNational Tsing Hua UniversityIstituto Nazionale di Fisica Nucleare, Sezione di LecceSofia University "St. Kliment Ohridski"Jožef Stefan InstituteUniversity of UdineUniversity of LisbonParthenope University of NaplesInstitute of Particle PhysicsUniversity of TrentoIstituto Nazionale di Fisica Nucleare, Trento Institute for Fundamental Physics And ApplicationsUniversity of PisaAcademia SinicaUniversity of SalentoBoğaziçi UniversityBolu Abant İzzet Baysal UniversityRoma Tre UniversityPontificia Universidad Católica de ChileMillennium InstituteKTH Royal Institute of TechnologyUniversidade Federal da BahiaUniversity of BucharestUniversité Ibn-TofailUniversidade de São PauloUniversity of Hong KongLouisiana Tech UniversityShandong UniversityCentro Nacional de MicroelectrónicaInstitut de Microelectrònica de BarcelonaCity University of New YorkUniversity of CoimbraUniversity of the Philippines DilimanUniversidad Nacional de ColombiaNational Centre of Scientific Research "Demokritos"University of AlbertaLink Campus UniversityUniversity of the AegeanIstituto Nazionale di Fisica Nucleare, Sezione di TorinoWest University of TimişoaraInstitució Catalana de Recerca i Estudis AvançatsSun Yat-sen UniversityHenan UniversityŌtani UniversityUniversity of TsukubaNational University of Science and TechnologyUniversity of La SerenaYeditepe UniversityIlia State UniversityUniversity of TarapacáTechnion – Israel Institute of TechnologyUniversity of the WitwatersrandUniversität InnsbruckOchanomizu UniversityIowa State UniversityUniversidad Andrés BelloKobe UniversityXi'an Aeronautical UniversityHellenic Open UniversityHong Kong University of Science and TechnologyNankai UniversityUniversity of KwaZulu-NatalStellenbosch UniversityiThemba LaboratoryBen-Gurion University of the NegevUniversity of Colorado BoulderUniversidad Antonio NariñoThe University of SydneyKyushu UniversityTransylvania University of BrașovNational Institute for Research and Development of Isotopic and Molecular TechnologiesJustus-Liebig-Universität GießenUniversity of SharjahBulgarian Academy of SciencesInstitute for Nuclear Research and Nuclear EnergyWashington CollegeTOBB University of Economics and TechnologyUniversität HamburgMongolian Academy of SciencesSan Sebastián UniversityTokyo Metropolitan University

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

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