Are the reactions $\gamma\gamma\to VV'$ a challenge for the factorized Pomeron at high energies?

TL;DR

This paper highlights significant violations of the factorized Pomeron exchange model in high-energy gamma-gamma to vector-vector reactions, challenging its applicability in this regime despite its success elsewhere.

Contribution

It demonstrates that the factorized Pomeron model fails for gamma-gamma to VV' reactions at high energies, indicating the need for alternative explanations.

Findings

Strong violation of the factorized Pomeron model in gamma-gamma to VV' reactions

Model works well in other high-energy processes

Challenges the universality of the Pomeron exchange hypothesis

Abstract

We would like to point to the strong violation of the putative factorized Pomeron exchange model in the reactions $\gamma\gamma\to VV'$ in the high-energy region where this model works fairly well in all other cases.