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

G. Aad, T. Abajyan, Mogens Dam, Jørgen Beck Hansen, Peter Henrik Hansen, John Renner Hansen, Jørn Dines Hansen, Morten Dam Jørgensen, Nele Maria Philomena Boelaert, Simon Johann Franz Heisterkamp, Ask Emil Løvschall-Jensen, Esben Bryndt Klinkby, Björn Stefan Nilsson, Sascha Mehlhase, Troels Christian Petersen, Stefania Xella