Aad G.Abbott B.Abeling K.Abidi S. H.Aboulhorma A.Abramowicz H.Abreu H.Abulaiti Y.Abusleme Hoffman A. C.Acharya B. S.Bourdarios C. AdamAdamczyk L.Adamek L.Addepalli S. V.Adelman J.Adiguzel A.Adorni S.Adye T.Affolder A. A.Afik Y.Agaras M. N.Agarwala J.Aggarwal A.Agheorghiesei C.Aguilar-Saavedra J. A.Ahmad A.Ahmadov F.Ahmed W. S.Ahuja S.Ai X.Aielli G.Tamlihat M. AitAitbenchikh B.Aizenberg I.Akbiyik M.Akesson T. P. A.Akimov A. V.Al Khoury K.Alberghi G. L.Albert J.2025-05-192025-05-192023/11/241434-6044http://dx.doi.org/10.1140/epjc/s10052-023-12104-7https://publicacionesabiertas.userena.cl/handle/123456789/263A search for pair-produced scalar or vector leptoquarks decaying into a b-quark and a tau-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 root s = 13TeV. Events in which at least one tau-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 tau-lepton and b-quark. For scalar leptoquarks, masses below 1460GeV are excluded assuming B = 100%, while for vector leptoquarks the corresponding limit is 1650GeV (1910GeV) in the minimal-coupling (Yang-Mills) scenario.HIGGS-STRAHLUNG, HADRONArticle