Search in diphoton and dielectron final states for displaced production of Higgs or Z bosons with the ATLAS detector in p s=13 TeV pp collisions

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dc.WoS.categoriesAstronomy & AstrophysicsPhysics, Particles & Fieldsen_US
dc.authorid0000-0001-5050-8441en_US
dc.contributor.authorÇetin, Serkant Ali
dc.date.accessioned2024-04-25T08:36:48Z
dc.date.available2024-04-25T08:36:48Z
dc.date.issued2023-10-30
dc.departmentFakülteler, Mühendislik ve Doğa Bilimleri Fakültesi, Enerji Sistemleri Mühendisliği Bölümüen_US
dc.description.abstractA search is presented for displaced production of Higgs bosons or Z bosons, originating from the decay of a neutral long-lived particle (LLP) and reconstructed in the decay modes H -& gamma;& gamma; and Z -ee. The analysis uses the full Run 2 dataset of proton-proton collisions delivered by the LHC at an energy of p1/4 13 TeV between 2015 and 2018 and recorded by the ATLAS detector, corresponding to an ffiffi s integrated luminosity of 139 fb-1. Exploiting the capabilities of the ATLAS liquid argon calorimeter to precisely measure the arrival times and trajectories of electromagnetic objects, the analysis searches for the signature of pairs of photons or electrons which arise from a common displaced vertex and which arrive after some delay at the calorimeter. The results are interpreted in a gauge-mediated supersymmetry breaking model with pair-produced Higgsinos that decay to LLPs, and each LLP subsequently decays into either a Higgs boson or a Z boson. The final state includes at least two particles that escape direct detection, giving rise to missing transverse momentum. No significant excess is observed above the background expectation. The results are used to set upper limits on the cross section for Higgsino pair production, up to a & chi;& SIM;01 mass of 369 (704) GeV for decays with 100% branching ratio of & chi; & SIM;01 to Higgs (Z) bosons for a & chi;& SIM;01 lifetime of 2 ns. A model-independent limit is also set on the production of pairs of photons or electrons with a significant delay in arrival at the calorimeter.en_US
dc.fullTextLevelFull Texten_US
dc.identifier.doi10.1103/PhysRevD.108.012012
dc.identifier.issn2470-0029
dc.identifier.issn2470-0010
dc.identifier.urihttps://hdl.handle.net/11411/5323
dc.identifier.urihttps://doi.org/10.1103/PhysRevD.108.012012
dc.identifier.wosWOS:001058590400001en_US
dc.identifier.wosqualityQ1en_US
dc.indekslendigikaynakWeb of Scienceen_US
dc.issue1en_US
dc.language.isoenen_US
dc.nationalInternationalen_US
dc.numberofauthors200+en_US
dc.publisherAMER PHYSICAL SOCen_US
dc.relation.ispartofPHYSICAL REVIEW Den_US
dc.relation.publicationcategoryMakale - Uluslararası Hakemli Dergi - Kurum Öğretim Elemanıen_US
dc.rightsinfo:eu-repo/semantics/openAccessen_US
dc.subjectDYNAMICAL SUPERSYMMETRY BREAKINGen_US
dc.subjectMODELen_US
dc.subjectEXTENSIONen_US
dc.subjectWEAKen_US
dc.titleSearch in diphoton and dielectron final states for displaced production of Higgs or Z bosons with the ATLAS detector in p s=13 TeV pp collisions
dc.typeArticle
dc.volume108en_US

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