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

TL;DR

This paper investigates the behavior of charmonium particles moving through a strongly coupled QCD plasma using a holographic model, providing insights into their spectral functions, dispersion relations, and dissociation temperatures at finite momentum.

Contribution

It introduces a holographic approach to study charmonium in a moving medium, extending previous models by analyzing momentum dependence and dissociation temperatures.

Findings

Spectral functions at finite momentum align with lattice results.

No subluminal limiting velocity observed in dispersion relations.

Dissociation temperature decreases faster with momentum than in earlier models.

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.