Gluon saturation effects on J/Psi production in heavy ion collisions

TL;DR

This paper investigates how gluon saturation influences J/Psi production in heavy ion collisions, showing it causes a narrower rapidity distribution and contributes to J/Psi suppression, distinct from quark-gluon plasma effects.

Contribution

It introduces a new mechanism for J/Psi production considering gluon saturation and quantifies its impact on rapidity distribution and suppression in nuclear collisions.

Findings

Gluon saturation narrows the rapidity distribution of J/Psi in AA collisions.

Gluon saturation significantly contributes to J/Psi suppression.

The effects can be distinguished from quark-gluon plasma influences.

Abstract

We consider a novel mechanism for J/Psi production in nuclear collisions arising due to the high density of gluons. We calculate the resulting J/Psi production cross section as a function of rapidity and centrality. We evaluate the nuclear modification factor and show that the rapidity distribution of the produced J/Psi's is significantly more narrow in AA collisions due to the gluon saturation effects. Our results indicate that gluon saturation in the colliding nuclei is a significant source of J/Psi suppression that can be disentangled from the quark-gluon plasma effects.