On the mechanisms of heavy-quarkonium hadroproduction

TL;DR

This paper examines the different theoretical mechanisms behind heavy-quarkonium production in hadron collisions, incorporating higher-order QCD corrections and proposing new observables for better discrimination.

Contribution

It provides a comprehensive analysis of production mechanisms including higher-order corrections and introduces new observables to distinguish between them.

Findings

Higher-order QCD corrections significantly impact production predictions

Inclusion of s-channel cut contributions alters the understanding of the CS channel

Proposed observables improve discrimination between production mechanisms

Abstract

We discuss the various mechanisms potentially at work in hadroproduction of heavy quarkonia in the light of computations of higher-order QCD corrections both in the Colour-Singlet (CS) and Colour-Octet (CO) channels and the inclusion of the contribution arising from the s-channel cut in the CS channel. We also discuss new observables meant to better discriminate between these different mechanisms.