Prospects for quarkonium studies at the high-luminosity LHC

TL;DR

This paper reviews the future potential of quarkonium studies at the high-luminosity LHC, emphasizing the vast data samples and diverse collision modes to address key open issues and explore new physics phenomena.

Contribution

It provides a comprehensive assessment of the experimental and theoretical prospects for quarkonium physics at the upcoming high-luminosity LHC phase, highlighting novel research opportunities.

Findings

Potential to study quarkonium production in various collision modes.

Constraints on gluon and nuclear PDFs from quarkonium data.

Insights into quark-gluon plasma and parton dynamics.

Abstract

Prospects for quarkonium-production studies accessible during the upcoming high-luminosity phases of the CERN Large Hadron Collider operation after 2021 are reviewed. Current experimental and theoretical open issues in the field are assessed together with the potential for future studies in quarkonium-related physics. This will be possible through the exploitation of the huge data samples to be collected in proton-proton, proton-nucleus and nucleus-nucleus collisions, both in the collider and fixed-target modes. Such investigations include, among others, those of: (i) J/psi and Upsilon produced in association with other hard particles; (ii) chi(c,b) and eta(c,b) down to small transverse momenta; (iii) the constraints brought in by quarkonia on gluon PDFs, nuclear PDFs, TMDs, GPDs and GTMDs, as well as on the low-x parton dynamics; (iv) the gluon Sivers effect in polarised-nucleon collisions; (v) the properties of the quark-gluon plasma produced in ultra-relativistic heavy-ion collisions and of collective partonic effects in general; and (vi) double and triple parton scatterings.