Speaker
Description
Heavy quarks (charm and beauty) are produced in hard parton scatterings in the early stages of hadronic collisions. Therefore, they are ideal probes to investigate the properties of the Quark-Gluon Plasma (QGP) produced in ultra-relativistic heavy-ion collisions. The study of angular correlations between heavy-flavour particles and charged particles allows us to characterize the heavy-quark fragmentation process and its possible modification in a hot nuclear matter environment. The measurement of heavy-flavour jets gives more direct access to the initial parton kinematics and can provide further constraints for heavy-quark energy loss models, in particular adding information on how the radiated energy is dissipated in the medium.
Studies in pp collisions are mandatory to characterise heavy-quark production and fragmentation in vacuum, constituting the necessary reference for interpreting heavy-ion collision results. Differences between results from pp and p-Pb collisions can give insight on how the heavy-quark production and hadronisation into jets is affected by cold nuclear matter effects.
This contribution will include the latest heavy-flavour correlation and jet measurements with the ALICE detector in pp, p-Pb and Pb-Pb collisions from the LHC run-2 data. In particular, the results of azimuthal correlations of D mesons with charged particles in pp collisions at $\sqrt{s}$ = 5.02, 7 and 13 TeV and in p-Pb collisions at $\sqrt{s_{NN}}$ = 5.02 TeV will be presented. Measurements of multiplicity and centrality dependent azimuthal correlations of heavy-flavour hadron decay electrons with charged particles in p-Pb and Pb-Pb collisions at $\sqrt{s_{NN}}$ = 5.02 TeV will be shown. In addition, the new measurement of D-meson tagged jet production in pp collisions at $\sqrt{s}$ = 5 TeV will be presented, along with the final results at $\sqrt{s}$ = 7 TeV, that include the study of the jet- momentum fraction carried by the D meson. Recent results in p-Pb collisions at $\sqrt{s_{NN}}$ = 5.02 TeV will be reported. The first measurement of the nuclear modification factor of D-tagged jet in Pb-Pb collisions at $\sqrt{s_{NN}}$ = 5.02 TeV will also be discussed.
