Diffractive production of [Formula presented] in proton-antiproton collisions at the Fermilab Tevatron

We show that the cross section of the diffractive production of [Formula presented] can be described as the sum of two contributions: the first is proportional to the probability of finding a small size [Formula presented] color dipole in the fast hadron wave function before the interaction with a target, while the second is the [Formula presented] production after or during the interaction with the target. The formulas are presented as well as the discussion of the interrelation between these two contributions and the Ingelman-Schlein and coherent diffraction mechanisms. The main prediction is that the coherent diffraction mechanism dominates, at least at the Fermilab Tevatron energies, giving the unique possibility to study it experimentally.