Quarkonium dynamics inside the Quark-Gluon Plasma using open quantum systems

Stéphane Delorme (1) , Thierry Gousset (1) , Roland Katz (1) , Pol-Bernard Gossiaux (1)

1 SUBATECH - Laboratoire de physique subatomique et des technologies associées

In recent years, a significant theoretical effort has been made towards a dynamical description of quarkonia inside the Quark-Gluon Plasma (QGP), using the open quantum systems formalism. In this framework, one can get a real-time description of a quantum system (here the quarkonium) in interaction with a thermal bath (the QGP) by integrating out the bath degrees of freedom and studying the system reduced density matrix. We investigate the real-time dynamics of a correlated heavy quark-antiquark pair inside the QGP using a quantum master equation previously derived from first QCD principles in [4]. The full equation is directly resolved in 1D to lessen computing costs and is used for the first time to gain insight on the dynamics in both a static and evolving medium following a Björken-like temperature evolution.

Mots clés: master equation; costs; computer; temperature; thermal; quarkonium; quantum chromodynamics; quark antiquark: pair; density matrix: reduced; quark gluon: plasma

Domaines: Physique des Hautes Energies - Phénoménologie [hep-ph]

Stéphane Delorme, Thierry Gousset, Roland Katz, Pol-Bernard Gossiaux. Quarkonium dynamics inside the Quark-Gluon Plasma using open quantum systems. 19th International Conference on Strangeness in Quark Matter, May 2021, Online, United States. pp.12001, ⟨10.1051/epjconf/202225912001⟩. ⟨hal-03557632⟩