2026-07-072026-07-07http://salesiana.dossiersoluciones.com/handle/123456789/46875The large rapidity gap events from HERA are analyzed within a model containing a pomeron and an $f$-reggeon contribution. The choice for the pomeron contribution is based on the Donnachie-Landshoff model. The dependence of the "effective intercept" of the pomeron on the momentum fraction $β$ and on its Bjorken variable $ξ$ is calculated.9 pages, Latex + 3 figures, postscriptHigh Energy Physics - Phenomenologytext