Aad, G.Abbott, B.Abbott, D.C.Abed Abud, A.Abeling, K.Abhayasinghe, D.K.Abidi, S.H.Abramowicz, H.Abreu, H.Abulaiti, Y.Abusleme Hoffman, A.C.Acharya, B.S.Achkar, B.Adam, L.Adam Bourdarios, C.Adamczyk, L.Adamek, L.Adelman, J.Adiguzel, A.Adorni, S.Adye, T.Affolder, A.A.Afik, Y.Agapopoulou, C.Agaras, M.N.Agarwala, J.Aggarwal, A.Agheorghiesei, C.Aguilar-Saavedra, J.A.Ahmad, A.Ahmadov, F.Ahmed, W.S.Ai, X.Aielli, G.Akatsuka, S.Akbiyik, M.Åkesson, T.P.A.Akimov, A.V.Al Khoury, K.Alberghi, G.L.Albert, J.Alconada Verzini, M.J.Alderweireldt, S.Aleksa, M.Aleksandrov, I.N.Alexa, C.Alexopoulos, T.Alfonsi, A.Alfonsi, F.Alhroob, M.Ali, B.Ali, S.Aliev, M.Alimonti, G.Allaire, C.Allbrooke, B.M.M.Allport, P.P.Aloisio, A.Alonso, F.Alpigiani, C.2025-04-092025-04-092021-10-01Physical Review Letters, Volume 127, Issue 14, 1 October 2021, Article number A560031-9007https://repositorio.unab.cl/handle/ria/64071Indexación: Scopus.A search for new phenomena is presented in final states with two leptons and one or no b-tagged jets. The event selection requires the two leptons to have opposite charge, the same flavor (electrons or muons), and a large invariant mass. The analysis is based on the full run-2 proton-proton collision dataset recorded at a center-of-mass energy of s=13 TeV by the ATLAS experiment at the LHC, corresponding to an integrated luminosity of 139 fb-1. No significant deviation from the expected background is observed in the data. Inspired by the B-meson decay anomalies, a four-fermion contact interaction between two quarks (b, s) and two leptons (ee or μμ) is used as a benchmark signal model, which is characterized by the energy scale and coupling, Λ and g∗, respectively. Contact interactions with Λ/g∗ lower than 2.0 (2.4) TeV are excluded for electrons (muons) at the 95% confidence level, still far below the value that is favored by the B-meson decay anomalies. Model-independent limits are set as a function of the minimum dilepton invariant mass, which allow the results to be reinterpreted in various signal scenarios. © 2021 CERN.enAstrophysicsBosonsFermionsHadronsTellurium compoundsA-centerATLAS detectorsB meson decaysCenter-of-mass energiesContact interactionEvent selectionFinal stateInvariant massOpposite chargeProton proton collisionsArtículoAttribution 4.0 International CC BY 4.0 Deed10.1103/PhysRevLett.127.141801