A search for new long-lived particles decaying to leptons is presented using proton-proton collisions produced by the LHC at ffiffi s p ¼ 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-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 ¼ 2 cm, 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
Sola, V.;AMAPANE, Nicola Carlo;ARGIRO', Stefano;BELLAN, Riccardo;COSTA, Marco;MIGLIORE, Ernesto;MONACO, Vincenzo;OBERTINO, Maria Margherita;ROMERO, Alessandra;SACCHI, Roberto;SOLANO, Ada Maria;COVARELLI, Roberto;
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 ffiffi s p ¼ 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-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 ¼ 2 cm, excluding masses below 790 GeV at 95% confidence level.File | Dimensione | Formato | |
---|---|---|---|
PhysRevLett.114-2.pdf
Accesso aperto
Tipo di file:
PDF EDITORIALE
Dimensione
650.24 kB
Formato
Adobe PDF
|
650.24 kB | Adobe PDF | Visualizza/Apri |
I documenti in IRIS sono protetti da copyright e tutti i diritti sono riservati, salvo diversa indicazione.