Aad, G.Abbott, B.Abeling, K.Abidi, S.H.Aboulhorma, A.Abramowicz, H.Çetin, Serkant Ali2024-05-192024-05-1920231434-6044https://doi.org/10.1140/epjc/s10052-023-12104-7https://hdl.handle.net/20.500.12713/4543A search for pair-produced scalar or vector leptoquarks decaying into a b-quark and a ? -lepton is presented using the full LHC Run 2 (2015–2018) data sample of 139 fb - 1 collected with the ATLAS detector in proton–proton collisions at a centre-of-mass energy of s=13 TeV. Events in which at least one ? -lepton decays hadronically are considered, and multivariate discriminants are used to extract the signals. No significant deviations from the Standard Model expectation are observed and 95% confidence-level upper limits on the production cross-section are derived as a function of leptoquark mass and branching ratio B into a ? -lepton and b-quark. For scalar leptoquarks, masses below 1460 GeV are excluded assuming B= 100 %, while for vector leptoquarks the corresponding limit is 1650 GeV (1910 GeV) in the minimal-coupling (Yang–Mills) scenario. © 2023, The Author(s).eninfo:eu-repo/semantics/openAccessElementary ParticlesGermanium CompoundsSignal ProcessingA-CenterAtlas DetectorsBottom QuarksCenter-Of-Mass EnergiesCentre-Of-Mass EnergiesData SampleLeptoquarksPair ProductionProton Proton CollisionsThird GenerationGermanium AlloysArticle83112-s2.0-8518074598110.1140/epjc/s10052-023-12104-7N/A