Charmonium moving through a strongly coupled QCD plasma: A holographic perspective

The properties of charmonium in a strongly coupled QCD-like plasma at finite momentum are studied. This is based upon a “bottom-up” holographic model which has been previously shown to reproduce charmonium phenomenology in vacuum and give a reasonable dissociation temperature at zero momentum. The finite momentum spectral functions are presented and found to be consistent with recent lattice results. The in-medium dispersion relation and momentum dependence of the decay width of J/ψ have also been investigated. We find no signature of a subluminal limiting velocity from the dispersion relation, while we note that the dissociation temperature decreases with momentum faster than previous holographic models. Based upon the dissociation temperature, a maximum momentum for J/ψ in-medium is identified and its phenomenological implications on J/ψ suppression are discussed.