2026-07-072026-07-07http://salesiana.dossiersoluciones.com/handle/123456789/42017We report on the extension of the data fitting considering the QCD inspired model based on the summation of gluon ladders applied to the $ep$ scattering. In lines of a two Pomeron approach, the structure function $F_2$ has a hard piece given by the model and the remaining soft contribution: a soft Pomeron and non-singlet content. In this contribution, we carefully estimate the relative role of the hard and the soft pieces from a global fit in a large span of $x$ and $Q^2$.10 pages, 3 figures, uses crckapb.sty. To appear in the proceedings of Diffraction 2002: Second International "Cetraro" Workshop and NATO Advanced Research WorkshopHigh Energy Physics - Phenomenologytext