Heavy quarkonia in a medium as a quantum dissipative system: Master-equation approach

Abstract

The problem of the evolution of a heavy quarkonium in a medium can be recast as that of a quantum dissipative system. Within the framework of the master-equation approach to open quantum systems, we consider the real-time dynamics of quarkonia. We find that in a plasma at fixed temperature, the populations of the various quarkonium states evolve together, while their momentum distribution satisfies a Fokker-Planck equation.

12 pages, 8 figures. Version 2 matches the published version

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