  Knowledge of the mechanism of neutrino mass generation would help understand
a lot more about Lepton Number Violation (LNV), the cosmological evolution of
the Universe, or the evolu tion of astronomical objects. Here we propose a
verifiable and viable extension of the Standard model for neutrino mass
generation, with a low-scale seesaw mechanism via LNV condensation in the
sector of sterile neutrinos. To prove the concept, we analyze a simplified
model of just one single family of elementary particles and check it against a
set of phenomenological constraints coming from electroweak symmetry breaking,
neutrino masses, leptogenesis and dark matter. The model predicts (i) TeV scale
quasi-degenerate heavy sterile neutrinos, suitable for leptogenesis with
resonant enhancement of the CP asymmetry, (ii) a set of additional heavy Higgs
bosons whose existence can be challenged at the LHC, (iii) an additional light
and sterile Higgs scalar which is a candidate for decaying warm dark matter,
and (iv) a majoron. Since the model is based on simple and robust principles of
dynamical mass generation, its parameters are very restricted, but remarkably
it is still within current phenomenological limits.
