2026-07-072026-07-07http://salesiana.dossiersoluciones.com/handle/123456789/39890Starting from a rewiev of DGLAP and BFKL evolution equations for small-x processes, a sistematic study is performed in order to understand the limits of both the formulations and to improve them in a unique framework, which aims to cover the whole range of applicability of perturbative QCD and which describes the transition mechanism from perturbative to non-perturbative physics in the region where unitarity contributions are expected not to be important.LaTeX file, 160 pages, 52 eps figures, PhD ThesisHigh Energy Physics - Phenomenologytext