QCD corrections to $J/\psi$ plus $Z^0$-boson production at the LHC

TL;DR

This paper calculates next-to-leading order QCD corrections to the associated production of J/psi and Z bosons at the LHC, providing refined predictions to test the color-octet mechanism in heavy quarkonium production.

Contribution

It presents the first NLO QCD correction calculations for J/psi plus Z boson production at the LHC within the nonrelativistic QCD framework.

Findings

NLO corrections significantly enhance the differential cross section.

The results improve the theoretical understanding of heavy quarkonium production.

Potential for LHC to verify the color-octet mechanism through these measurements.

Abstract

The $J/\psi+Z^0$ associated production at the LHC is an important process in investigating the color-octet mechanism of non-relativistic QCD in describing the processes involving heavy quarkonium. We calculate the next-to-leading order (NLO) QCD corrections to the $J/\psi +Z^0$ associated production at the LHC within the factorization formalism of nonrelativistic QCD, and provide the theoretical predictions for the distribution of the $J/\psi$ transverse momentum. Our results show that the differential cross section at the leading-order is significantly enhanced by the NLO QCD corrections. We conclude that the LHC has the potential to verify the color-octet mechanism by measuring the $J/\psi+Z^0$ production events.