Jet results and jet reconstruction techniques in p+p and their prospects in heavy-ion collisions in ATLAS

The ATLAS program for heavy ion jet studies in the upcoming Pb+Pb collisions will be outlined. With the collision energy provided by the LHC and the hermetic and highly segmented calorimeter, measurements of fully reconstructed jets in heavy on collisions will be possible. Several differential studies that can be performed with fully reconstructed jets will be discussed, with the emphasis on the influence of underlying event. Similar measurements, of jet energy spectra and the jet internal structure, performed in p+p collisions at 7 TeV and 900 GeV with the ATLAS detector will also be presented.