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

Title
Search for Displaced Supersymmetry in Events with an Electron and a Muon with Large Impact Parameters
Authors
김태정
Keywords
PROTON-PROTON COLLISIONS; OF-MASS ENERGIES; ROOT-S=7 TEV; ATLAS DETECTOR; PP COLLISIONS; E(+)E(-) COLLISIONS; BREAKING TOPOLOGIES; HEAVY-PARTICLES; VERTICES
Issue Date
2015-02
Publisher
AMER PHYSICAL SOC
Citation
PHYSICAL REVIEW LETTERS, v. 114, NO 6, Page. 1-10
Abstract
A search for new long-lived particles decaying to leptons is presented using proton-proton collisions produced by the LHC at root 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-mu final states. Limits are set on the "displaced supersymmetry" model, with pair production of top squarks decaying into an e-mu 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 c tau = 2 cm, excluding masses below 790 GeV at 95% confidence level.
URI
http://journals.aps.org/prl/abstract/10.1103/PhysRevLett.114.061801http://hdl.handle.net/20.500.11754/22216
ISSN
0031-9007; 1079-7114
DOI
http://dx.doi.org/10.1103/PhysRevLett.114.061801
Appears in Collections:
COLLEGE OF NATURAL SCIENCES[S](자연과학대학) > PHYSICS(물리학과) > Articles
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