A search for new long-lived particles decaying to leptons is presented using proton-proton collisions produced by the LHC at [s]=8TeV. Data used for the analysis were collected by the CMS detector and correspond to an integrated luminosity of 19.7fb(-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 ctau=2cm, excluding masses below 790 GeV at 95% confidence level.

Search for displaced supersymmetry in events with an electron and a muon with large impact parameters

CIOCCI, MARIA AGNESE;Donato, S;MESSINEO, ALBERTO MARIA;RIZZI, ANDREA;TONELLI, GUIDO EMILIO;Musich, M;Bianchini, L;Marini, A. C;
2015-01-01

Abstract

A search for new long-lived particles decaying to leptons is presented using proton-proton collisions produced by the LHC at [s]=8TeV. Data used for the analysis were collected by the CMS detector and correspond to an integrated luminosity of 19.7fb(-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 ctau=2cm, excluding masses below 790 GeV at 95% confidence level.
2015
Khachatryan, V; Sirunyan, A. M; Tumasyan, A; Adam, W; Bergauer, T; Dragicevic, M; Ero, J; Friedl, M; Fruhwirth, R; Ghete, V. M; Hartl, C; Hormann, N; ...espandi
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Utilizza questo identificativo per citare o creare un link a questo documento: https://hdl.handle.net/11568/765672
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