Jet splitting measurements in Pb-Pb and pp collisions at $\sqrt{s}_{\mathrm{NN}} =$ 5.02 TeV with ALICE

Recent ALICE measurements of jet splittings in Pb–Pb and pp collisions at sNN=5.02TeV are reported. These measurements scan the phase space of jet emissions in search of medium-induced signals which are expected to emerge at different scales. These include effects such as multiple soft-radiation, single hard emissions, and color coherence. The Lund plane diagram is shown, including projections onto distributions of the splitting scale k T in intervals of the splitting angle R g . Soft Drop grooming is applied to access hard splittings within the jet, enabling measurements of groomed substructure variables. These include the shared momentum fraction z g between the two hardest subjets and the number of Soft Drop splittings n SD . The results in Pb–Pb collisions are compared to PYTHIA events embedded into a Pb–Pb background to separate out background from in-medium effects. Measurements of z g and the normalized splitting angle θ g will also be shown in pp collisions at sNN=5.02TeV for different grooming settings.