CepGen -- A generic central exclusive processes event generator for hadron-hadron collisions

TL;DR

CepGen is a versatile event generator designed for simulating central exclusive processes in hadron-hadron collisions, integrating multiple production mechanisms and providing a unified framework for various photon-induced reactions.

Contribution

It introduces a comprehensive, flexible event generator for central exclusive processes, including two-photon production and $k_T$-factorized descriptions, unifying multiple approaches in a single tool.

Findings

Numerical consistency between different production approaches demonstrated.

Implementation of $k_T$-factorized description for photon-induced processes.

Framework supports various photon-induced processes, enhancing simulation capabilities.

Abstract

We present an event generator for the simulation of central exclusive processes in hadron-hadron reactions. Among others, it implements the two-photon production of lepton pairs previously introduced in LPAIR. As a proof of principle, we show that the two approaches are numerically consistent. The $k_{\rm T}$-factorized description of this process is also handled, along with the two-photon production of a quark, or a $W^\pm$ gauge boson pair. This toolbox may be used as a common framework for the definition of many other processes following this approach. Additionally, photoproduction and other photon induced processes are also considered, or being implemented.