2026-07-072026-07-07http://salesiana.dossiersoluciones.com/handle/123456789/180570We re-examine the question of radiative symmetry breaking in the standard model in the presence of right-chiral neutrinos and a minimally enlarged scalar sector. We demonstrate that, with these extra ingredients, the hypothesis of classically unbroken conformal symmetry, besides naturally introducing and stabilizing a hierarchy, is compatible with all available data; in particular, there exists a set of parameters for which the model may remain viable even up to the Planck scale. The decay modes of the extra scalar field provide a unique signature of this model which can be tested at LHC.13 pages, 6 figures, version to be published in Phys. Lett. BHigh Energy Physics - TheoryHigh Energy Physics - Phenomenologytext