# $J/\psi$ production in hadron scattering: three-pomeron contribution

## TL;DR

This paper investigates the dominant three-pomeron fusion mechanism for inclusive $J/\psi$ production in proton-proton collisions, showing it aligns with CGC/Saturation theory and explains experimental multiplicity enhancements.

## Contribution

It introduces the three-pomeron fusion as a key mechanism for $J/\psi$ production, connecting it with CGC/Saturation and experimental multiplicity observations.

## Key findings

- Three-pomeron fusion significantly contributes to $J/\psi$ production.
- The mechanism explains the shapes of rapidity, momentum, and multiplicity distributions.
- The approach accounts for the observed multiplicity enhancement in experiments.

## Abstract

In this paper we discuss the inclusive $J/\psi$ production in proton-proton collisions from fusion of three pomerons. We demonstrate that this mechanism gets dominant contribution from the region which can be theoretically described by CGC/Saturation approach. Numerically, it gives a substantial contribution to the $J/\psi$ production, and is able to describe the experimentally observable shapes of the rapidity, momenta and multiplicity distributions. The latter fact provides a natural explanation of the experimentally observed enhancement of multiplicity distribution in $J/\psi$ production.