Subleading power corrections to heavy quarkonium production in QCD factorization approach

TL;DR

This paper discusses the importance of subleading power corrections in QCD factorization to accurately describe heavy quarkonium production at various transverse momentum ranges, bridging high and low $p_T$ regimes.

Contribution

It introduces a method to incorporate subleading power corrections and match QCD factorization with NRQCD calculations for improved quarkonium production modeling.

Findings

Subleading power corrections are crucial at lower $p_T$.

A prescription for matching QCD and NRQCD calculations is proposed.

Enhanced understanding of quarkonium $p_T$ spectrum across regimes.

Abstract

We report the current understanding of heavy quarkonium production at high transverse momentum ($p_T$) in hadronic collisions in terms of QCD factorization. In this presentation, we highlight the role of subleading power corrections to heavy quarkonium production, which are essential to describe the $p_T$ spectrum of quarkonium at a relatively lower $p_T$. We also introduce prescription to match QCD factorization to fixed-order NRQCD factorization calculations for quarkonium production at low $p_T$.