2026-07-072026-07-07http://salesiana.dossiersoluciones.com/handle/123456789/230157We study a hierarchical disordered pinning model with site disorder for which, like in the bond disordered case [6, 9], there exists a value of a parameter b (enters in the definition of the hierarchical lattice) that separates an irrelevant disorder regime and a relevant disorder regime. We show that for such a value of b the critical point of the disordered system is different from the critical point of the annealed version of the model. The proof goes beyond the technique used in [9] and it takes explicitly advantage of the inhomogeneous character of the Green function of the model.13 pages, 1 figure, final version accepted for publication. to appear in Probability Theory and Related FieldsProbability60K37, 82B44, 37H99text