Semi-classical approach to $J/ψ$ suppression in high energy heavy-ion collisions

We study the heavy quark/antiquark pair dynamics in strongly-coupled quark gluon plasma. A semi-classical approach, based on the Wigner distribution and Langevin dynamics, is applied to a color screened $c{\bar c}$ pair, in a hydrodynamically cooling fireball, to evaluate the total $J/ψ$ suppression at both RHIC and LHC energies. Although its limitation is observed, this approach results to a $J/ψ$ suppression of around 0.30 at RHIC and 0.25 at LHC.

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