Abstract
We study the properties of charmonium in a strongly coupled QCD-like plasma at finite momentum. As a basis for this study, a "bottom-up" holographic model is used 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 decay width of J/Psi have also been studied. 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/Psi in medium is identified and its phenomenological implications on J/Psi suppression are discussed.
Highlights
The work of Matsui and Satz [1] introduced the idea of using heavy quarkonium as a probe of the formation of a strongly coupled quark gluon plasma (QGP)
We have studied the properties of charmonium moving in a strongly coupled medium from a holographic model
This is determined by studying the momentum dependence of the height of the J/ψ spectral peak
Summary
The work of Matsui and Satz [1] introduced the idea of using heavy quarkonium as a probe of the formation of a strongly coupled quark gluon plasma (QGP). Various properties of QCD, both in vacuum and at finite temperature, have been modeled within that framework These techniques have been applied to charmonium moving in medium previously, though they were typically from a “top-down” approach [20,21,22] 2 Their results can be characterized by observing a decrease in the dissociation temperature with momentum and dispersion relation which exhibits a subluminal group velocity at asymptotically large momentum |k|. We present results on in-medium properties of moving charmonium in both transverse and longitudinal channel from the phenomenological (“bottom-up”) holography model constructed in Ref.
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