Related Experiment Video
Updated: Apr 16, 2026

Setting Limits on Supersymmetry Using Simplified Models
Published on: November 15, 2013
Search for displaced supersymmetry in events with an electron and a muon with large impact parameters
V Khachatryan1, A M Sirunyan1, A Tumasyan1
1Yerevan Physics Institute, Yerevan, Armenia.
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.
Related Concept Videos
Impact
When particles with different initial velocities collide, they induce deformation by applying equal and opposite impulses. At the point of maximum deformation, the particles move together with...
Mass Analyzers: Common Types
Subatomic Particles
Collisions in Multiple Dimensions: Introduction
Thomson's e/m Experiment
A particle with charge q, speed v, and mass m enters an area from the top, where the magnetic and electric fields are perpendicular both to the particle's motion and to one another. The magnetic...
π Electron Effects on Chemical Shift: Overview

