Search for a heavy top-quark partner in final states with two leptons with the ATLAS detector at the LHC
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(Published version)
Date
2012
Authors
Jackson, P.
Soni, N.
White, M.
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Journal Title
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Journal article
Citation
The Journal of High Energy Physics, 2012; 2012(11):94-1-94-34
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The ATLAS Collaboration
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Abstract
The results of a search for direct pair production of heavy top-quark partners in 4.7 fb⁻¹ of integrated luminosity from pp collisions at √s = 7 TeV collected by the ATLAS detector at the LHC are reported. Heavy top-quark partners decaying into a top quark and a neutral non-interacting particle are searched for in events with two leptons in the final state. No excess above the Standard Model expectation is observed. Limits are placed on the mass of a supersymmetric scalar top and of a spin-1/2 top-quark partner. A spin-1/2 top-quark partner with a mass between 300 GeV and 480 GeV, decaying to a top quark and a neutral non-interacting particle lighter than 100 GeV, is excluded at 95% confidence level.
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Description
Atlas Collaboration contributor: Paul Douglas Jackson and Nitesh Soni of School of Chemistry and Physics, University of Adelaide, North Terrace Campus, 5000, SA, Australia. Extent: 35p.
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Copyright CERN, for the benefit of the ATLAS collaboration