  We show that the electroweak symmetry can be broken in a natural and
phenomenologically acceptable way by a neutrino condensate. Therefore, we
assume as particle content only the chiral fermions and gauge bosons of the
Standard Model and in addition right-handed neutrinos. A fundamental Higgs
field is absent. We assume instead that new interactions exist that can
effectively be described as four-fermion interactions and that can become
critical in the neutrino sector. We discuss in detail the coupled
Dirac-Majorana gap equations which lead to a neutrino condensate, electroweak
symmetry breaking and via the dynamical see-saw mechanism to small neutrino
masses. We show that the effective Lagrangian is that of the Standard Model
with massive neutrinos and with a composite Higgs particle. The mass
predictions are consistent with data.
