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

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.

Original languageEnglish (US)
Article number094
Pages (from-to)1-34
Number of pages34
JournalJournal of High Energy Physics
Volume2012
Issue number11
DOIs
StatePublished - 2012
Externally publishedYes

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Keywords

  • Hadron-Hadron scattering

ASJC Scopus subject areas

  • Nuclear and High Energy Physics

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