Speaker
Description
Heavy-flavor jets and their substructure provide a unique window into the role of quark mass on QCD radiation and its modification in nuclear matter. In this work, we investigate heavy-quark energy-energy (EEC) correlators that are explicitly sensitive to mass effects, focusing on angular correlations, energy flow, and the dead-cone effect. We demonstrate how the finite mass of charm and bottom quarks reshapes the intra-jet radiation pattern, leading to characteristic suppressions at small angles and measurable deviations from massless jet expectations. Using effective field theory analysis, we extend the calculation of these observables to reactions with nuclei to show medium-induced radiation competes with vacuum mass suppression, resulting in a nontrivial modification of jet substructure. Specifically, we identify regimes where the jet substructure is dominated by the heavy quark mass, leading to qualitatively and quantitatively different behavior of the EEC in nuclear matter, and obtain new analytic results for the energy loss of heavy quark jets. We discuss the charm and bottom jet energy-energy correlators modification in semi-inclusive DIS at the EIC, and further demonstrate how the formalism can be tested in small collision system at current facilities.
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