$J/\Psi \Upsilon$ Production at LHC

TL;DR

This paper investigates the production of $$ and $$ meson pairs at LHCb, highlighting the dominant role of double parton scattering and providing detailed theoretical predictions for various production channels.

Contribution

It offers the first comprehensive analysis of $$ pair production at LHC, including multiple production mechanisms and their relative contributions.

Findings

Double parton scattering dominates the cross section.

Theoretical predictions for total cross sections are provided.

Different kinematical distributions are analyzed.

Abstract

Inclusive production of $\Upsilon J/\psi$ pair in proton-proton interation at LHCb is considered. This process is forbidden at leading order of perturbation theory, so such channels as double parton scattering, $\chi_b\chi_c$ pair production with subsequent radiative decays of $P$-wave quarkonia, contributions of color-octet states, and NLO corrections are studied in details. For all these channels we present theoretical predictions of total cross sections at LHCb and distributions over different kinematical variables. According to presented in the paper results, double parton interaction gives main contribution to the cross section of the considered reaction.