Gluon dissociation of $J/\psi$ in anisotropic {\em Quark-Gluon-Plasma}

TL;DR

This paper investigates how anisotropy in the quark-gluon plasma affects gluon dissociation of J/psi particles, showing reduced suppression probability and directional dependence at RHIC and LHC energies.

Contribution

It introduces a calculation of gluon dissociation cross-section in an anisotropic plasma, highlighting the impact of momentum space anisotropy on J/psi suppression.

Findings

Decreased J/psi suppression probability in anisotropic plasma.

Cross-section and survival probability depend on propagation direction.

Sensitivity of survival probability to initial conditions.

Abstract

We calculate the gluon dissociation cross-section in an anisotropic quark gluon plasma expected to be formed due relativistic nucleus-nucleus collisions. The initial rapid longitudinal expansion of the system leads to momentum space anisotropy due which the observables are affected in such a system. We show that the thermally weighted cross-section of gluon dissociation undergoes modification in anisotropic plasma leading to a decreased probability of $J/\psi$ suppression both for RHIC and LHC energies. The dependence of the cross section as well as the survival probability on the direction of propagation of the charmonium with respect to the anisotropy axis are presented. The sensitivity of the survival probability on the initial conditions have also been demonstrated.