  The unitarity corrections effects encoded in the Glauber-Mueller approach are
taken into account to calculate the differential cross sections in the
Drell-Yan process in the rest frame. A detailed study of the Drell-Yan process
in terms of the $\gamma^{*}q$ transverse separation and the color dipole size,
as well as the effective dipole cross section is performed and compared with
the available small $x$ data. Estimates for the Drell-Yan cross section at RHIC
energies are presented and discussed.
