Unitarity Corrections to the Drell-Yan Process in the Target Rest Frame

Abstract

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 ${\gamma }^{\ast }q$ 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.

Comments: 31 pages, 8 figures. Version to be published in Phys. Rev. D