QCD studies at LHC with ATLAS

The study of QCD processes at the LHC will serve two main goals. First, the predictions of QCD will be tested and precision measurements will be performed, allowing additional constraints to be established, or providing measurements of the strong coupling constant. Second, QCD processes represent a major part of the background to other Standard Model processes and signals of new physics at the LHC and therefore need to be understood in depth. An overview of various measurements of QCD-related processes to be performed at the LHC are presented, based on final states containing high-pT leptons, photons and jets. The possibility of discovering new physics by studying deviations from Standard Model QCD predictions is also discussed.