VITIELLO G.

We show that the non-perturbative vacuum structure associated with neutrino mixing leads to a non-zero contribution to the value of the cosmological constant. Such a contribution comes from the specific nature of the mixing phenomenon. Its origin is completely different from the one of the ordinary contribution of a massive spinor field. We...

We report on the recent result according to which the non-perturbative vacuum structure associated with neutrino mixing leads to a non-vanishing contribution to the value of the cosmological constant. Its value is estimated by using the natural cut-off appearing in the quantum field theory formalism for neutrino mixing. © 2005 American...

We report on recent results showing that neutrino mixing may lead to a non-zero contribution to the cosmological constant. This contribution is of a completely different nature with respect to the usual one by a massive spinor field. We also study the problem of field mixing in Quantum Field Theory in curved space-time, for the case of a scalar...