A search for quantum black holes in electron þ jet and muon þ jet invariant mass spectra is performed with 140 fb−1 of data collected by the ATLAS detector in proton-proton collisions at ffiffi s p ¼ 13 TeV at the Large Hadron Collider. The observed invariant mass spectrum of lepton þ 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.

Aad, G., Abbott, B., Abbott, D. ., Abed Abud, A., Abeling, K., Abhayasinghe, D. ., et al. (2024). Search for quantum black hole production in lepton+jet final states using proton-proton collisions at s=13  TeV with the ATLAS detector. PHYSICAL REVIEW D, 109(3) [10.1103/physrevd.109.032010].

Search for quantum black hole production in lepton+jet final states using proton-proton collisions at s=13  TeV with the ATLAS detector

Aielli, G.;Camarri, P.;Cerrito, L.;De Sanctis, U.;Di Ciaccio, A.;