Disintegration of Quarkonia in QGP Due to Time Dependent Potential
Rapid thermalization in ultra-relativistic heavy-ion collisions leads to fast changing potential between a heavy quark and antiquark from zero temperature potential to the finite temperature one. Time dependent perturbation theory can then be used to calculate the survival probability of the initial quarkonium state. In view of very short time scales of thermalization at RHIC and LHC energies, we calculate the survival probability of \(J/\psi \) and \(\varUpsilon \) using sudden approximation. Our results show that quarkonium decay may be significant even when temperature of QGP remains low enough so that the conventional quarkonium melting due to Debye screening is ineffective.
We are very thankful to Abhishek Atreya, Arpan Das, Shreyansh S. Dave, Biswanath Layek, and Ananta P. Mishra for useful discussions.