Search for squarks and gluinos in pp collisions at √s=13 TeV and 13.6 TeV in events with τ-leptons, jets and missing transverse momentum using the ATLAS detector

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2025

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Aad, G.
Aakvaag, E.
Abbott, B.
Abdelhameed, S.
Abeling, K.
Abicht, N.J.
Abidi, S.H.
Aboelela, M.
Aboulhorma, A.
Abramowicz, H.

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European Physical Journal C, 2025; 85(12):1437-1-1437-47

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A search for R-parity-conserving supersymmetry in events with large missing transverse momentum, jets and at least one hadronically decaying tau-lepton is presented. Both gluino and squark pair production are considered, with the cascade decay of each gluino or squark producing either a tau-slepton or a tau-sneutrino. Three channels are examined, requiring either exactly one hadronically decaying tau-lepton and no other leptons, exactly one hadronically decaying tau-lepton and at least one other lepton, or two or more hadronically decaying tau-leptons. Analyses in the three channels are optimised independently and combined statistically. Two separate analysis strategies, either a cut-and-count or machine-learning approach, are used. The search uses 140 fb(-1) and 51.8 fb(-1) of pp collision data recorded by the ATLAS detector at the Large Hadron Collider during 2015-2018 at root s=13 TeV and 2022-2023 at root s=13.6 TeV, respectively. Gluino masses below 2.25 TeV and squark masses up to 1.7 TeV are excluded

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© CERN for the benefit of the ATLAS Collaboration 2025. This article is licensed under a Creative Commons Attribution 4.0 International License

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