A search for top-squark pair production, in final states containing a top quark, a charm quark and missing transverse momentum, using the 139 fb−1 of pp collision data collected by the ATLAS detector

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dc.authorscopusidAndrew John Beddall / 57215802986
dc.authorwosidAndrew John Beddall / CFL-1774-2022
dc.contributor.authorAad, Georges
dc.contributor.authorAbbott, Brad K.
dc.contributor.authorBeddall, Andrew John
dc.date.accessioned2025-04-18T07:57:22Z
dc.date.available2025-04-18T07:57:22Z
dc.date.issued2024
dc.departmentİstinye Üniversitesi, Rektörlük, Temel Bilimler Bölümü
dc.description.abstractThis paper presents a search for top-squark pair production in final states with a top quark, a charm quark and missing transverse momentum. The data were collected with the ATLAS detector during LHC Run 2 and correspond to an integrated luminosity of 139 fb−1 of proton-proton collisions at a centre-of-mass energy of s = 13 TeV. The analysis is motivated by an extended Minimal Supersymmetric Standard Model featuring a non-minimal flavour violation in the second- and third-generation squark sector. The top squark in this model has two possible decay modes, either t~1→cχ~10 or t~1→tχ~10, where the χ~10 is undetected. The analysis is optimised assuming that both of the decay modes are equally probable, leading to the most likely final state of tc+ETmiss. Good agreement is found between the Standard Model expectation and the data in the search regions. Exclusion limits at 95% CL are obtained in the mt~1 vs. mχ~10 plane and, in addition, limits on the branching ratio of the t~1→tχ~10 decay as a function of m(t~1) are also produced. Top-squark masses of up to 800 GeV are excluded for scenarios with light neutralinos, and top-squark masses up to 600 GeV are excluded in scenarios where the neutralino and the top squark are almost mass degenerate. © The Author(s) 2024.
dc.identifier.citationATLAS Collaboration. (2024). A search for top-squark pair production, in final states containing a top quark, a charm quark and missing transverse momentum, using the 139 fb $^{-1} $ of $ pp $ collision data collected by the ATLAS detector. arXiv preprint arXiv:2402.12137.
dc.identifier.doi10.1007/JHEP07(2024)250
dc.identifier.issn10298479
dc.identifier.issue7
dc.identifier.scopus2-s2.0-85200565461
dc.identifier.scopusqualityQ1
dc.identifier.urihttps://hdl.handle.net/20.500.12713/6506
dc.identifier.volume2024
dc.indekslendigikaynakScopus
dc.institutionauthorBeddall, Andrew John
dc.institutionauthoridAndrew John Beddall / 0000-0002-8451-9672
dc.language.isoen
dc.publisherSpringer Science and Business Media Deutschland GmbH
dc.relation.ispartofJournal of High Energy Physics
dc.relation.publicationcategoryMakale - Uluslararası Hakemli Dergi - Kurum Öğretim Elemanı
dc.rightsinfo:eu-repo/semantics/openAccess
dc.subjectBeyond Standard Model
dc.subjectHadron-Hadron Scattering
dc.subjectSupersymmetry
dc.titleA search for top-squark pair production, in final states containing a top quark, a charm quark and missing transverse momentum, using the 139 fb−1 of pp collision data collected by the ATLAS detector
dc.typeArticle

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