Aad, G.Abbott, B.Abbott, D. C.Abud, A. AbedAbeling, K.Abhayasinghe, D. K.Sultansoy, S.2024-04-202024-04-2020242470-00102470-0029https://doi.org/10.1103/PhysRevD.109.032010https://hdl.handle.net/20.500.11851/11498A search for quantum black holes in electron + jet and muon + jet invariant mass spectra is performed with 140 fb(-1) of data collected by the ATLAS detector in proton-proton collisions at root s = 13 TeV at the Large Hadron Collider. The observed invariant mass spectrum of lepton + jet pairs is consistent with Standard Model expectations. Upper limits are set at 95% confidence level on the production cross section times branching fractions for quantum black holes decaying into a lepton and a quark in a search region with invariant mass above 2.0 TeV. The resulting quantum black hole lower mass threshold limit is 9.2 TeV in the Arkani-Hamed-Dimopoulos-Dvali model, and 6.8 TeV in the Randall-Sundrum model.eninfo:eu-repo/semantics/openAccessPp CollisionsDistributionsDimensionsHierarchyDecayArticle2-s2.0-8518715507810.1103/PhysRevD.109.032010