Jet suppression and jet substructure in Pb+Pb and Xe+Xe collisions with the ATLAS detector

This short summary presents latest measurements of the nuclear modification factor, $R_{AA}$, for $R=0.4$ jets in Pb+Pb collisions at $\sqrt{s_{\mathrm{NN}}}$ = 5.02 TeV with the ATLAS detector at the LHC. The analysis is performed over a large range of transverse momentum, up to $p_{\mathrm{T}}=1$ TeV, and differentially in jet $p_{\mathrm{T}}$, rapidity, and collision centrality. The jet $R_{AA}$ is measured also differentially in the jet mass which provides a new information on the dependence of the energy loss on the substructure of jets. Latest results on the dijet momentum balance in Xe+Xe collisions at $\sqrt{s_{\mathrm{NN}}}$ = 5.44 TeV are presented and compared to the same quantity measured in Pb+Pb collisions $\sqrt{s_{\mathrm{NN}}}$ = 5.02 TeV. These recent measurements should help us understand mechanisms of parton energy loss and properties of hot and dense matter created in heavy-ion collisions.