Speaker
syaefudin jaelani
(Utrecht University)
Description
Open heavy-flavour hadrons are unique probes to study the Quark-Gluon Plasma formed in ultra-relativistic heavy-ion collisions. Due to their large masses, heavy quarks are produced in hard scattering processes in the early stages of the collisions and thus experience the full evolution of the medium, loosing part of their energy interacting with its constituents. The in-medium energy loss can be studied by measuring the nuclear modification factor (RAA), which compares the pT-differential yield in Pb-Pb collisons with that in pp collisions (σpp × tAA gives the reference yield). The measurement of the azimuthal anisotropy (elliptic flow, v2) of D-meson production in semi-central collisions allows to investigate, at low pT, the participation of the heavy quarks in the collective expansion of the system and their thermalization in the medium. At high pT, the measurement of v2 can provide information on the path length depencence of parton energy loss.
In this talk, the recent measurements of the production of D*, D0 and D+ mesons in Pb-Pb collisions at sNN= 5.02 TeV performed with the ALICE detector will be presented. The measurement of D-meson RAA and v2 for different centrality classes will be shown and compared to the theoretical model prediction.
