2026-07-072026-07-07http://salesiana.dossiersoluciones.com/handle/123456789/39991Strong gauge and top-Yukawa couplings predicted in the presence of extra dimensions lead to a trickle-down effect of the top-coupling through the renormalization group equations for the quark Yukawa matrices. The matrix elements for the u and d-quarks get progressively smaller as one moves away from the dominant (33)-element revealing a hierarchical pattern for the mass matrices.12 pagesHigh Energy Physics - Phenomenologytext