Aula Conversi, Roma 1

A considerable progress has been made in the recent years in the measurement of the neutrino oscillation parameters. On the other hand, crucial observables as the "chooz" mixing angle or the neutrinoless double beta decay rate are still weakly constrained. Such observables are important for understanding the pattern of the neutrino mass matrix and its origin. Their measurement is one of the priorities of future neutrino experiments. In the context of the standard ideas on the origin of the neutrino mass matrix and its pattern, and based on general arguments, I will discuss the expectations for the size of those observables, as well as the possibility of making precise predictions.