Differently from the canonical seesaw mechanism, which is grounded in grand
unified theories, the inverse seesaw mechanism lacks a special framework that
realizes it naturally. In this work we advocate that the 3-3-1 model with
right-handed neutrinos has such an appropriate framework to accommodate the
inverse seesaw mechanism. We also provide an explanation for the smallness of
the μ parameter and estimate the branching ratio for the rare lepton flavor
violation process μ→eγ.Comment: About 14pages, no figures, basis corrected, to appear at the PR