2026-07-072026-07-07http://salesiana.dossiersoluciones.com/handle/123456789/39312We consider geometrical properties of the polarized and unpolarized structure functions and provide definition for the $b$--dependent structure functions. It is shown that unitarity does not allow factorized form of the structure functions over the $x$ and $b$ variables. We conclude that the spin of constituent quark has a significant orbital angular momentum component.8 pages, 1 figureHigh Energy Physics - PhenomenologyHigh Energy Physics - ExperimentNuclear Theorytext