QCD Factorizations in Exclusive gamma* gamma* -> rho0_L rho0_L

TL;DR

This paper investigates the QCD factorization properties in the exclusive process e+ e- -> e+ e- rho0_L rho0_L, demonstrating collinear factorization at moderate energies and exploring BFKL effects at high energies.

Contribution

It provides a detailed analysis of factorization mechanisms in the process, connecting collinear QCD factorization with GDA and TDA, and discusses potential BFKL resummation effects at high energies.

Findings

Collinear factorization emerges at moderate energies.

GDA and TDA frameworks are applicable.

Potential BFKL effects at high energies.

Abstract

The exclusive process e+ e- -> e+ e-rho0_L rho0_L allows to study various dynamics and factorization properties of perturbative QCD. At moderate energy, we demonstrate how collinear QCD factorization emerges, involving either generalized distribution amplitudes (GDA) or transition distribution amplitudes (TDA). At higher energies, in the Regge limit of QCD, we show that it offers a promising probe of the BFKL resummation effects to be studied at ILC.