Velocity Dependence of Charmonium Dissociation Temperature in High-Energy Nuclear Collisions

TL;DR

This paper investigates how the velocity of quarkonium states affects their dissociation temperature in high-energy nuclear collisions, revealing that higher velocities lead to increased dissociation temperatures and reduced suppression at high transverse momentum.

Contribution

It introduces a velocity-dependent model for quarkonium dissociation temperature, accounting for medium relaxation effects in high-energy nuclear collisions.

Findings

Velocity dependence increases dissociation temperature at high velocities.

High transverse momentum quarkonia are less suppressed due to velocity effects.

Model aligns with observed suppression patterns at RHIC and LHC.

Abstract

In high-energy nuclear collisions, heavy quark potential at finite temperature controls the quarkonium production. Including the relaxation of the medium induced by the relative velocity between quarkonia and the deconfined expanding matter, the Debye screening is reduced and the quarkonium dissociation takes place at a higher temperature. As a consequence of the velocity dependent dissociation temperature, the quarkonium suppression at high transverse momentum is significantly weakened in high energy nuclear collisions at RHIC and LHC.