Search for Displaced Supersymmetry in Events with an Electron and a Muon with Large Impact Parameters
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PhysRevLett.114.061801.pdf
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Author(s)
Khachatryan, V.
Sirunyan, A. M.
Tumasyan, A.
Adam, W.
Bergauer, T.
Dragicevic, M.
Erö, J.
Friedl, M.
Frühwirth, R.
Ghete, V. M.
Date Issued
February 2015
Journal
Physical Review Letters
Publisher
American Physical Society
Citation
Khachatryan, V., A. M. Sirunyan, A. Tumasyan, W. Adam, T. Bergauer, M. Dragicevic, J. Erö, et al. “Search for Displaced Supersymmetry in Events with an Electron and a Muon with Large Impact Parameters.” Physical Review Letters 114, no. 6 (February 2015).
Version
Final published version
Abstract
A search for new long-lived particles decaying to leptons is presented using proton-proton collisions produced by the LHC at √s = 8 TeV. Data used for the analysis were collected by the CMS detector and correspond to an integrated luminosity of 19.7 fb[superscript -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=2 cm, excluding masses below 790 GeV at 95% confidence level.
MIT Department
Massachusetts Institute of Technology. Department of Physics
Massachusetts Institute of Technology. Laboratory for Nuclear Science
Massachusetts Institute of Technology. School of Science
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DOI of Published Version
http://dx.doi.org/10.1103/PhysRevLett.114.061801
