# New Observables in Inclusive Production of Quarkonia

## TL;DR

This paper reviews recent advances in understanding quarkonium production, highlighting new observables involving associated production with other particles, and discusses their implications for particle physics and multi-parton interactions.

## Contribution

It introduces novel observables in inclusive quarkonium production, emphasizing their potential to elucidate production mechanisms and multi-parton interactions.

## Key findings

- New observables involving associated production with bosons, quarks, and light hadrons.
- Insights into the role of double parton scatterings in quarkonium production.
- Comprehensive overview of experimental data and future prospects.

## Abstract

After an introduction motivating the study of quarkonium production, we review the recent developments in the phenomenology of quarkonium production in inclusive scatterings of hadrons and leptons. We naturally address data and predictions relevant for the LHC, the Tevatron, RHIC, HERA, LEP, B factories and EIC. An up-to-date discussion of the contributions from feed downs within the charmonium and bottomonium families as well as from b hadrons to charmonia is also provided. This contextualises an exhaustive overview of new observables such as the associated production along with a Standard Model boson (photon, W and Z), with another quarkonium, with another heavy quark as well as with light hadrons or jets. We address the relevance of these reactions in order to improve our understanding of the mechanisms underlying quarkonium production as well as the physics of multi-parton interactions, in particular the double parton scatterings. An outlook towards future studies and facilities concludes this review.