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Type: Journal article
Title: Search for light top squark pair production in final states with leptons and b-jets with the ATLAS detector in √s=7 TeV proton-proton collisions
Other Titles: Search for light top squark pair production in final states with leptons and b-jets with the ATLAS detector in root s=7 TeV proton-proton collisions
Author: Jackson, P.
Soni, N.
White, M.
Citation: Physics Letters B, 2013; 720(1-3):13-31
Publisher: Elsevier Science BV
Issue Date: 2013
ISSN: 0370-2693
Contributor: Jackson, Paul Douglas
Soni, Nitesh
Statement of
ATLAS Collaboration
Abstract: The results of a search for pair production of light top squarks are presented, using 4.7 fb⁻¹ of View the MathML sources=7 TeV proton–proton collisions collected with the ATLAS detector at the Large Hadron Collider. This search targets top squarks with masses similar to, or lighter than, the top quark mass. Final states containing exclusively one or two leptons (e,μe,μ), large missing transverse momentum, light-flavour jets and b-jets are used to reconstruct the top squark pair system. Event-based mass scale variables are used to separate the signal from a large tt¯ background. No excess over the Standard Model expectations is found. The results are interpreted in the framework of the Minimal Supersymmetric Standard Model, assuming the top squark decays exclusively to a chargino and a b-quark, while requiring different mass relationships between the Supersymmetric particles in the decay chain. Light top squarks with masses between 123–167 GeV are excluded for neutralino masses around 55 GeV.
Description: ATLAS Collaboration contributor: Paul Douglas Jackson and Nitesh Soni of School of Chemistry and Physics, University of Adelaide, Adelaide, Australia
Rights: © 2013 CERN. Published by Elsevier B.V. All rights reserved.
RMID: 0020126677
DOI: 10.1016/j.physletb.2013.01.049
Appears in Collections:Chemistry and Physics publications

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