2026-07-072026-07-07http://salesiana.dossiersoluciones.com/handle/123456789/44042The un-integrated parton distribution functions (uPDFs) obtained from a CCFM evolution are studied in terms of the intrinsic transverse momentum distribution at low scales. The uPDFs are studied for variations of the renormalization and factorization scales.to appear in proceeding of DIS2004High Energy Physics - Phenomenologytext