Speaker
Description
Heavy-Quarkonia evolution in quark-gluon plasma (QGP) can be studied using the framework of open quantum systems. The density matrix of the quarkonia satisfies a simple Lindblad-type equation if one assumes that the binding energy $E_b$ is much smaller than the medium temperature $T$. This approximation does not hold for a significant part of the QGP evolution. We study the evolution of quarkonia in the regime when $E_b \sim T$ by solving general master equations for the density matrix, which include the effects of memory. Mainly we calculate suppression of $\Upsilon(1S)$ at CMS and RHIC energies. For the background medium, we use results from a realistic viscous 2+1 hydrodynamic simulation, which gives a good description of the phenomenology of the soft particles.
