Quarkonium production in nuclear collisions

TL;DR

This paper reviews recent measurements of quarkonium production in nuclear collisions at RHIC and LHC, highlighting suppression effects, production mechanisms, and insights into the quark-gluon plasma.

Contribution

It provides a comprehensive overview of experimental results across different collision systems and energies, offering critical tests for theoretical models of quarkonium behavior in nuclear matter.

Findings

Significant suppression of quarkonium at low transverse momentum in p+A collisions.

Interplay of dissociation and regeneration in A+A collisions affects charmonium yields.

Suppression levels correlate with binding energy in bottomonium family.

Abstract

In these proceedings, an overview of recent quarkonium measurements in nuclear collisions carried out at both RHIC and LHC is presented. In p+p collisions, despite theoretical progresses made in understanding the production mechanisms for quarkonia, a complete picture is still yet to be achieved. In p+A collisions where measurements are done to quantify the cold nuclear matter effects, significant suppression of quarkonium production is observed for low transverse momentum region at both forward- and mid-rapidities. Furthermore, results from A+A collisions show the interplay of dissociation and regeneration contributions for charmonium at different collision energies, while a correspondence between the suppression level and the binding energy is observed for bottomonium family. Comparisons to experimental data provide stringent tests to model calculations, and help constrain the temperature of the deconfined medium created in heavy-ion collisions.