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Search for Displaced Supersymmetry in Events with an Electron and a Muon with Large Impact Parameters
Journal article   Open access

Search for Displaced Supersymmetry in Events with an Electron and a Muon with Large Impact Parameters

Philip S Baringer, Alice Bean, Michael J Murray, Stephen J Sanders, Yasar Onel and CMS Collaboration
Physical review letters, Vol.114(6), 061801
11/29/2016
DOI: 10.1103/PhysRevLett.114.061801
url
https://doi.org/10.1103/PhysRevLett.114.061801View
Published (Version of record) Open Access

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−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.

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