2026-07-072026-07-07http://salesiana.dossiersoluciones.com/handle/123456789/42674Several properties of high energy hadronic collisions are illustrated by comparing DIS and the Drell-Yan process within a scalar QED model. Diffraction and transverse momentum broadening within the target system are found to be non-universal. Here these effects are simply due to the Coulomb phase shift in the Drell-Yan production amplitude.6 pages, 1 figure, talk given at DIS 2003, St. Petersburg, 23-27 April 2003High Energy Physics - Phenomenologytext