Speaker
Description
We study the propagation of charm and bottom quarks in the quark-gluon plasma (QGP) by means of a relativistic Boltzmann transport approach. The non-perturbative interaction of heavy quarks is described by means of a quasi-particle approach that entails only a weak dependence of the drag on the temperature. This features, along with hadronization by coalescence, plays a fundamental role to describe simultaneously the experimental data for the nuclear suppression factor $R_{AA}$ and the elliptic flow $v_2 (p_T )$ of D mesons at both RHIC to LHC energies.
In particular an hadronization by coalescence predict a very large $\Lambda_c$ baryon production that impact also the determination of the $R_{AA}$. In the same scheme, we present predictions for B mesons that allow also a determination of the space-diffusion coefficient that is practically independent on the transport scheme for HQ: Boltzmann vs Langevin.
Focusing on the role of initial state fluctuations to generate high order anisotropic flows $v_3 (p_T )$ and $v_4 (p_T )$ of D mesons, it will be discussed the role of QCD interaction in developing correlations between the light and the heavy flavor anisotropic flows ($v_n^{light}$,$v_n^{heavy}$) providing novel and powerful constraints for the transport coefficients.
Finally we show how $v_1$ provides a probe of the very strong initial electro-magnetic (e.m.) fields are created in Ultra-relativistic Heavy-Ion Collision (HIC) that induce a vorticity in the reaction plane that is odd under charge exchange. Even more it can induce a splitting of uncharged $D^0$ meson and antimeson providing a proof of the QGP phase.