2026-07-072026-07-07http://salesiana.dossiersoluciones.com/handle/123456789/48126Using 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.Latex, 12 pages, talk presented at "Continuous Advances at QCD" workshopHigh Energy Physics - Phenomenologytext