Hard probes at ATLAS

Recent experimental results on hard probes in Pb+Pb and p+Pb collisions from the ATLAS Collaboration are presented. They include electroweak boson production in Pb+Pb where the scaling with nuclear thickness was observed; Z production in p+Pb showing the scaling with T_A and an excess of Z at Pb-direction rapidity was found; direct modification of the jet fragmentation function in central Pb+Pb events was observed and nuclear modification factor R_AA was measured as ~0.8 in peripheral events and ~0.5 in central ones.