Jet mass resolution as a function of true jet mass $\it{M}_{\rom{ch\;jet}}^{\rom{probe}}$ for probes with $60< {\it p}_{\rom{T,ch\;jet}}^{\rom{probe}}  (\GeVc)< 80$ \GeVc. \PbPb{}: Anti-\kt{} PYTHIA jets with $R=0.4$ embedded into central \PbPb{} collisions taking into account background fluctuations and detector effects. \pPb{}: 4-vectors corresponding to detector-level PYTHIA jets embedded into \pPb{} events