Transverse momentum broadening due to the multiple scattering

Abstract

Using the Drell-Yan process in hadron-nucleus collisions and deeply inelastic lepton-nucleus scattering (DIS) as examples, I show that the transverse momentum broadening can be expressed in terms of four-parton correlation functions. I argue that jet broadening in DIS provide an excellent measurement of the four-parton correlation functions and a test of QCD treatment of the multiple scattering.

Comments: Latex, 12 pages, talk presented at "Continuous Advances at QCD" workshop