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The exclusive process e+ e- -> e+ e- rho^0_L rho^0_L allows to study variousdynamics and factorization properties of perturbative QCD. At moderate energy,we demonstrate how collinear QCD factorization emerges, involving generalizeddistribution amplitudes (GDA) and transition distribution amplitudes (TDA). Athigher energies, in the Regge limit of QCD, we show that it offers a promisingprobe of the BFKL resummation effects to be studied at the International LinearCollider (ILC).

Studying QCD factorizations in exclusive gamma* gamma* -> rho^0_L rho^0_L