Proof of factorization for electroproduction of multiple mesons and exclusive $\gamma^* \gamma$ production of multiple hadrons

TL;DR

This paper generalizes the proof of factorization in electroproduction processes to multiple mesons and exclusive gamma-gamma production of hadrons, valid to all orders in perturbation theory.

Contribution

It extends the theoretical proof of factorization to complex multi-hadron production processes in quantum chromodynamics.

Findings

Proof of factorization for multiple meson electroproduction

Proof of factorization for exclusive gamma-gamma to hadrons

Validity to all orders in perturbation theory

Abstract

In the following, we will present a generalization of the proof of factorization for electroproduction of vector mesons to the production of several mesons such as $\pi^+\pi^-$ and a proof of factorization for exclusive $\gamma^* \gamma$ production of several hadrons for example $p \bar p$ or $\pi^+\pi^-$ to all orders in perturbation theory up to power suppressed terms.