Data-driven analysis of the temperature dependence of the heavy-quark transport coefficient

By applying a Bayesian model-to-data comparison, our improved Langevin transport model simultaneously describes the D-meson nuclear modification factor RAA and elliptic flow v2 in heavy-ion collisions at both RHIC and LHC energies on an event-by-event basis. We extract the diffusion coefficients of charm quarks in a quark-gluon plasma medium and find the resulting spatial diffusion coefficient Ds is compatible with lattice QCD calculations.