TOP QUARK PHYSICS WITH ATLAS

The main Monte-Carlo predictions of the expected features of top-quark physics are presented for the 10 and 14 TeV collisions energy of the LHC machine. Study of cross-sections of top-antitop pair and single top production, properties of top-quark and search for Z’-resonance decaying to the top-antitop pair are carried out. Performance, effectiveness, energy resolution and other characteristics of the ATLAS detector were obtained with the first data. Preliminary estimations of cross-sections, properties and the Standard Model background are presented too.