Jackson, P.Soni, N.White, M.Jackson, Paul DouglasSoni, Nitesh2013-04-172013-04-172012The Journal of High Energy Physics, 2012; 2012(11):94-1-94-341029-84791029-8479http://hdl.handle.net/2440/77012Atlas 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.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.enCopyright CERN, for the benefit of the ATLAS collaborationJournal article002012626210.1007/JHEP11(2012)0940004321224000010003121985000292-s2.0-8487032511120810Jackson, P. [0000-0002-0847-402X]White, M. [0000-0001-5474-4580]