2026-07-072026-07-07http://salesiana.dossiersoluciones.com/handle/123456789/41682The structure of real and virtual photons has been studied in electron-proton scattering processes producing di-jet events at HERA by the H1 and ZEUS collaborations. Data have been compared to next-to-leading order QCD calculations and to the predictions of Monte Carlo generators based on the DGLAP and CCFM formalisms for describing the parton dynamicsProceedings 'QCD and High Energy Hadronic Interactions', Recontres de MoriondHigh Energy Physics - Phenomenologytext