ATLAS PHYSICS UPGRADE

Recent discovery of a Higgs boson opened a new era in the history of particle physics. The discovery came at half the LHC design energy, with much more severe pileup, and one-third of the integrated luminosity that was originally judged necessary. This demonstrates the great value of a bold early conceptual design, a systematic programme of development and construction, and a detailed understanding of detector performance, in confronting challenging physics goals. To fully exploit the physics potential of the LHC, a series of upgrades will be required to increase the yearly integrated luminosity by a factor 10 compared to the original design value. ATLAS will need to correspondingly upgrade its detectors, triggers and data acquisition systems. The aim is to be able to maintain a high efficiency for Standard Model and Beyond Standard Model signals despite a much more difficult environment caused by the increasing number of pileup from the high luminosity. The presentation will cover a general overview of the ATLAS physics for Higgs boson studies, new particle searches and top and electroweak processes for 300 and 3000 fb-1 of data at 14 TeV.