Khachatryan, V.Sirunyan, A. M.Tumasyan, A.Adam, W.Bergauer, T.Dragicevic, M.The CMS Collaboration2025-03-072025-03-0720150031-90071079-7114https://doi.org/10.1103/PhysRevLett.114.061801https://hdl.handle.net/20.500.12507/3169A search for new long-lived particles decaying to leptons is presented using proton-proton collisions produced by the LHC at root s = 8 TeV. Data used for the analysis were collected by the CMS detector and correspond to an integrated luminosity of 19.7 fb(-1). Events are selected with an electron and muon with opposite charges that both have transverse impact parameter values between 0.02 and 2 cm. The search has been designed to be sensitive to a wide range of models with nonprompt e-mu final states. Limits are set on the displaced supersymmetry model, with pair production of top squarks decaying into an e-mu final state via R-parity-violating interactions. The results are the most restrictive to date on this model, with the most stringent limit being obtained for a top squark lifetime corresponding to c tau = 2 cm, excluding masses below 790 GeV at 95% confidence level.eninfo:eu-repo/semantics/openAccessArticle1146WOS:0003512065000022572320410.1103/PhysRevLett.114.061801Q1