Scale Factor in Double Parton Collisions and Parton Densities in Transverse Space

Abstract

The scale factor ${\sigma }_{eff}$, which characterizes double parton collisions in high energy hadron interactions, is a direct manifestation of the distribution of the interacting partons in transverse space, in such a way that different distributions give rise to different values of ${\sigma }_{eff}$ in different double parton collision processes. We work out the value of the scale factor in a few reactions of interest, in a correlated model of the multi-parton density of the proton recently proposed.

Comments: 10 pages, 2 figures