A search for ttbar resonances with the ATLAS detector in 2.05 fb^-1 of proton-proton collisions at sqrt(s) = 7 TeV

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