Heavy quarkonium production in the Regge limit of QCD: from Tevatron to LHC

TL;DR

This paper analyzes heavy quarkonium production at Tevatron and LHC using non-relativistic QCD and Reggeized parton approaches, comparing predictions with experimental data to understand production mechanisms.

Contribution

It provides a comparison of theoretical predictions with experimental data for bottomonium production, highlighting the dominance of color-singlet mechanisms for Upsilon(1S) and the need for color-octet contributions for excited states.

Findings

Color-singlet mechanism dominates Upsilon(1S) production.

Color-octet contributions are necessary for Upsilon(2S) and Upsilon(3S).

Theoretical predictions align with CMS and LHCb data when including these mechanisms.

Abstract

Heavy quarkonium production in the framework of the non-relativistic quantum chromodynamics and leading order of the parton Reggeization approach at the Tevatron and LHC is discussed. In this note, we compare our predictions for the bottomonium production at the LHC due to the color-singlet approximation of the non-relativistic quantum chromodynamics with CMS and LHCb data. It is found, that in the production of Upsilon(1S) states, the color-singlet mechanism is dominating, whereas to describe the data for the inclusive Upsilon(2S) and Upsilon(3S) production, the color- octet contributions should be taken into account.