Double quarkonium production at high Feynman-$x$

TL;DR

This paper estimates proton-proton cross sections for double quarkonium production at high Feynman-x using the intrinsic heavy flavor mechanism, relevant for the AFTER@LHC experiment at 115 GeV.

Contribution

It provides the first estimates of double quarkonium production cross sections at high Feynman-x based on the intrinsic heavy flavor mechanism.

Findings

Cross section estimates for various quarkonium pairs at 115 GeV.

Identification of the intrinsic heavy flavor mechanism as dominant at high x_F.

Potential observability of double quarkonium production outside single and double parton scattering regimes.

Abstract

In this paper we give estimates for the proton--proton cross sections into pairs of quarkonium states $J/\psi$, $\psi(2S)$, $\Upsilon(1S)$ and $\Upsilon(2S)$ at the scheduled AFTER@LHC energy of $115$GeV. The estimates are based on the intrinsic heavy flavor mechanism which is observable for high values of $x_F$, a range outside the dominance of single parton and double parton scattering.