2026-07-072026-07-07http://salesiana.dossiersoluciones.com/handle/123456789/214786The process of exclusive vector meson production (gamma gamma to J/psi rho^0) is studied for almost real photons. This process may be reduced to photoproduction of J/psi off the rho^0 meson. We discuss the possibility of extracting the gluon distribution of rho^0 and of the photon from such measurement. Predictions are also given for the reaction (e+e- to e+ e- J/psi rho^0) for various e+e- cms energies typical for LEP and for the future linear colliders.10 pages with 3 Postscript figuresHigh Energy Physics - Phenomenologytext