Search for pair production of squarks or gluinos decaying via sleptons or weak bosons in final states with two same-sign or three leptons with the ATLAS detector

Aad, G.Abbott, B.Abeling, K.Abicht, N.J.Abidi, S.H.Aboulhorma, A.Abramowicz, H.Abreu, H.Abulaiti, Y.Abusleme Hoffman, A.C.Acharya, B.S.Adam Bourdarios, C.Adamczyk, L.Adamek, L.Addepalli, S.V.Addison, M.J.Adelman, J.Adiguzel, A.Adye, T.Affolder, A.A.et al.2024-10-232024-10-232024Journal of High Energy Physics (JHEP), 2024; 2024(2):107-1-107-541029-84791029-8479https://hdl.handle.net/2440/142921A search for pair production of squarks or gluinos decaying via sleptons or weak bosons is reported. The search targets a final state with exactly two leptons with same-sign electric charge or at least three leptons without any charge requirement. The analysed data set corresponds to an integrated luminosity of 139 fb(−1) of proton-proton collisions collected at a centre-of-mass energy of 13TeV with the ATLAS detector at the LHC. Multiple signal regions are defined, targeting several SUSY simplified models yielding the desired final states. A single control region is used to constrain the normalisation of the WZ + jets background. No significant excess of events over the Standard Model expectation is observed. The results are interpreted in the context of several supersymmetric models featuring R-parity conservation or R-parity violation, yielding exclusion limits surpassing those from previous searches. In models considering gluino (squark) pair production, gluino (squark) masses up to 2.2 (1.7) TeV are excluded at 95% confidence level.enCopyright CERN, for the benefit of the ATLAS Collaboration. Open Access. This article is distributed under the terms of the Creative Commons Attribution License (CC-BY4.0), which permits any use, distribution and reproduction in any medium, provided the original author(s) and source are credited.Beyond Standard Model; Hadron-Hadron Scattering; Lepton Production; SupersymmetrySearch for pair production of squarks or gluinos decaying via sleptons or weak bosons in final states with two same-sign or three leptons with the ATLAS detectorJournal article10.1007/jhep02(2024)1072024-10-21686492Filmer, E.K. [0000-0001-6967-7325]Jackson, P. [0000-0002-0847-402X]McDougall, A.E. [0000-0001-7713-2800]Potti, H. [0000-0002-0800-9902]Ting, E.X.L. [0000-0002-5886-6339]White, M.J. [0000-0001-5474-4580]