Speaker
Description
Heavy quarks are considered excellent probes to study the properties of the state of matter where quarks and gluons are deconfined, known as quark-gluon plasma (QGP). The QGP is expected to be formed in ultrarelativistic nuclear collisions. Non-prompt J/$\psi$ measurements are important to investigate the parton energy loss in the hot medium and its quark mass dependence, as they provide additional constraints to extract heavy-quark diffusion coefficients from experimental data. In addition, the prompt J/$\psi$ production provides a direct comparison with models that include (re-)generation, which is found to be the dominant production mechanism at low transverse momentum ($p_{\rm T}$) and in central collisions at the LHC. ALICE has unique tracking and particle identification capabilities down to very low momentum at midrapidity ($|y|<$ 0.9), enabling the separation of prompt and non-prompt J/$\psi$ down to $p_{\rm T}$ $\sim$ 1.5 GeV/$c$ in Pb$-$Pb collisions. In this contribution, recent ALICE results on nuclear modification factors ($R_{\rm AA}$) of prompt and non-prompt J/$\psi$, reconstructed at midrapidity in the dielectron decay channel, as a function of $p_{\rm T}$ and centrality will be presented and compared with theoretical predictions. Presented results are obtained by analyzing data from Pb$-$Pb collisions collected at $\sqrt{s_{\rm NN}}$ = 5.02 TeV during the LHC Run 2. Moreover, results will be compared with similar LHC measurements, available at higher $p_{\rm T}$.
