# Photon and Pomeron -- induced production of Dijets in $pp$, $pA$ and $AA$ collisions

## TL;DR

This paper compares photon and Pomeron induced dijet production in various collisions at the LHC, providing detailed predictions for cross sections and exploring their potential to test models and absorption effects.

## Contribution

It offers the first detailed comparison of photon and Pomeron induced dijet production in $pp$, $pA$, and $AA$ collisions at LHC energies using realistic Monte Carlo simulations.

## Key findings

- Photon-Pomeron channel dominates at forward rapidities in $pp$ collisions.
- Photon-Pomeron channel is dominant across all kinematics in heavy ion collisions.
- Results can test the Resolved Pomeron model and constrain absorption effects.

## Abstract

In this paper we present a detailed comparison of the dijet production by photon -- photon, photon -- pomeron and pomeron -- pomeron interactions in $pp$, $pA$ and ${\rm AA}$ collisions at the LHC energy. The transverse momentum, pseudo -- rapidity and angular dependencies of the cross sections are calculated at LHC energy using the Forward Physics Monte Carlo (FPMC), which allows to obtain realistic predictions for the dijet production with two leading intact hadrons. We obtain that $\gamma \pom$ channel is dominant at forward rapidities in $pp$ collisions and in the full kinematical range in the nuclear collisions of heavy nuclei. Our results indicate that the analysis of dijet production at the LHC can be useful to test the Resolved Pomeron model as well as to constrain the magnitude of the absorption effects.