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-μ final states. Limits are set on the "displaced supersymmetry" model, with pair production of top squarks decaying into an e-μ 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 cτ=2cm, excluding masses below 790 GeV at 95% confidence level.

Khachatryan, V., Sirunyan, A.M., Tumasyan, A., Adam, W., Bergauer, T., Dragicevic, M., et al. (2015). Search for displaced supersymmetry in events with an electron and a muon with large impact parameters. PHYSICAL REVIEW LETTERS, 114(6), 061801-061815 [10.1103/PhysRevLett.114.061801].

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

BONACORSI, DANIELE;BRAIBANT, SYLVIE;BRIGLIADORI, LUCA;CAMPANINI, RENATO;CAPILUPPI, PAOLO;CASTRO, ANDREA;CODISPOTI, GIUSEPPE;CUFFIANI, MARCO;FANFANI, ALESSANDRA;FASANELLA, DANIELE;GUIDUCCI, LUIGI;MASETTI, GIANNI;NAVARRIA, FRANCESCO LUIGI;ROSSI, ANTONIO MARIA;ROVELLI, TIZIANO;SIROLI, GIAN PIERO;BATTILANA, CARLO;
2015

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-μ final states. Limits are set on the "displaced supersymmetry" model, with pair production of top squarks decaying into an e-μ 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 cτ=2cm, excluding masses below 790 GeV at 95% confidence level.
2015
Khachatryan, V., Sirunyan, A.M., Tumasyan, A., Adam, W., Bergauer, T., Dragicevic, M., et al. (2015). Search for displaced supersymmetry in events with an electron and a muon with large impact parameters. PHYSICAL REVIEW LETTERS, 114(6), 061801-061815 [10.1103/PhysRevLett.114.061801].
Khachatryan, V.; Sirunyan, A.M.; Tumasyan, A.; Adam, W.; Bergauer, T.; Dragicevic, M.; Erö, J.; Friedl, M.; Frühwirth, R.; Ghete, V.M.; Hartl, C.; Hör...espandi
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Utilizza questo identificativo per citare o creare un link a questo documento: https://hdl.handle.net/11585/544595
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