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
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Aad-2013-Search for light top.pdf
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1.22 MB
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49defa326ef6bdfd69095864624cbcea
Author(s)
Taylor, Frank E.
Date Issued
January 2013
Journal
Physics Letters B
Publisher
Elsevier
Citation
Aad, G., T. Abajyan, B. Abbott, J. Abdallah, S. Abdel Khalek, A.A. Abdelalim, O. Abdinov, et al. “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.” Physics Letters B 720, no. 1–3 (March 2013): 13–31. © 2013 CERN
Version
Final published version
Abstract
The results of a search for pair production of light top squarks are presented, using 4.7 fb[superscript −1] √s = 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,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 t[bar over t] 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.
MIT Department
Massachusetts Institute of Technology. Department of Physics
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DOI of Published Version
https://doi.org/10.1016/j.physletb.2013.01.049
