New Results in the Physics of Neutrino Oscillations
Abstract
I report on recent theoretical results about neutrino mixing and oscillations. I show that in Quantum Field Theory, mixing transformations are not trivial and the vacuum for the mixed fields has a condensate structure. This fact has phenomenological consequences on neutrino oscillations: the oscillation formula turns out to have an additional oscillating piece and energy dependent amplitudes. The usual Pontecorvo formula is recovered in the relativistic limit. I report also about preliminary results on the presence of a topological (Berry) phase for oscillating neutrinos.
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