Francesco Scardina

Toward a solution to the RAA and v2 puzzle for heavy quarks

The heavy quarks constitutes a unique probe of the quark-gluon plasma properties. Both at RHIC and LHC energies a puzzling relation between the nuclear modification factor

Shear Viscosity of a strongly interacting system: Green-Kubo vs. Chapman-Enskog and Relaxation Time Approximation

R_{AA}(p_T)

Thermalization, Isotropization and Elliptic Flow from Nonequilibrium Initial Conditions with a Saturation Scale

and the elliptic flow

Heavy-flavor in-medium momentum evolution: Langevin versus Boltzmann approach

v_2(p_T)

Elliptic flow from non-equilibrium initial condition with a saturation scale

has been observed which challenged all the existing models, especially for D mesons. We discuss how the temperature dependence of the heavy quark drag coefficient is responsible for a large part of such a puzzle. In particular, we have considered four different models to evaluate the temperature dependence of drag and diffusion coefficients propagating through a quark gluon plasma (QGP). All the four different models are set to reproduce the same

Directed flow of charm quarks as a witness of the initial strong magnetic field in ultra-relativistic heavy ion collisions

R_{AA}(p_T)

Relativistic Boltzmann transport approach with Bose-Einstein statistics and the onset of gluon condensation

observed in experiments at RHIC and LHC energy. We point out that for the same

Shear viscosity and chemical equilibration of the QGP

R_{AA}(p_T)

Propagation of heavy baryons in heavy-ion collisions

one can generate 2-3 times more

Initial state fluctuations from mid-peripheral to ultra-central collisions in a event-by-event transport approach

v_2