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arXiv · 1209.4186

Search for a heavy top-quark partner in final states with two leptons with the ATLAS detector at the LHC

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 sqrt(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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ATLAS Collaboration. 2012-09-19. Search for a heavy top-quark partner in final states with two leptons with the ATLAS detector at the LHC. https://doi.org/10.1007/jhep11(2012)094

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