2026-07-072026-07-07http://salesiana.dossiersoluciones.com/handle/123456789/42494The extension of the factorization theorems of perturbative QCD to power corrections associated with re-scattering in nuclear collisions is reviewed. The importance of hadron-nucleus collisions is discussed.5 pages, 3 eps figures. Contribution to CERN Yellow Report on Hard Probes in Heavy Ion Collisions at the LHCHigh Energy Physics - PhenomenologyNuclear Theorytext