Charm and Beauty in the early stage of high energy nuclear collisions

par Prof. Marco Ruggieri (Université de Catane, Italie)

jeudi 7 nov. 2024, 14:00 → 15:00 Europe/Paris

Salle 1180, bâtiment E2 (Salle des séminaires )

In the high-energy nuclear collisions (HICs) at the Relativistic Heavy Ion Collider (RHIC) and the Large Hadron Collider (LHC), the quark-gluon plasma phase is preceded by an out-of-equilibrium stage that is dominated by gluon fields with large occupation numbers. Within the gluon saturation picture,  the (leading order) initial condition is called the Glasma, which consists of strong coherent gluon fields. The Glasma is then evolved via the classical Yang-Mills equations to a stationary state, where a standard description in terms of quasiparticles and relativistic kinetic theory is feasible. Heavy quarks, namely Charm (c) and Beauty (b) are excellent probes of the early stages of the HICs, as they are produced immediately after the collision and then diffuse in the medium, from the out-of-equilibrium stage to the quark-gluon plasma stage, up to hadronization. In this talk, I review some recent works on the topic of c and b in the evolving Glasma, which include the study of momentum diffusion, anisotropies as well as particle correlations.