Pair production of quarkonia and electroweak bosons from double-parton scatterings in nuclear collisions at the LHC

TL;DR

This paper calculates the cross sections and expected event rates for simultaneous production of quarkonia and electroweak bosons via double-parton scatterings in high-energy nuclear collisions at the LHC, incorporating nuclear effects.

Contribution

It provides the first detailed NLO QCD predictions for double-parton scattering processes involving quarkonia and gauge bosons in proton-nucleus and nucleus-nucleus collisions at the LHC.

Findings

Predicted event rates for various quarkonia and boson pairs in pPb and PbPb collisions.

Quantitative estimates of double-parton scattering contributions to these processes.

Inclusion of nuclear modifications in the parton density functions.

Abstract

Cross sections for the concurrent production of pairs of quarkonia (J/psi, Upsilon) and/or gauge bosons (W, Z) from double-parton scatterings (DPS) in high-energy proton-nucleus and nucleus-nucleus collisions at the LHC are calculated. The estimates are based on next-to-leading-order perturbative QCD predictions, including nuclear modifications of the parton densities, for the corresponding single-scattering cross sections. Expected event rates for J/psi+J/psi, J/psi+Upsilon, J/psi+W, J/psi+Z, Upsilon+Upsilon, Upsilon+W, Upsilon+Z, and same-sign W+W production in their (di)leptonic decay modes, after typical acceptance and efficiency losses, are given for pPb and PbPb collisions.