Neutrino Mixing: Theoretical Overview

We present a concise review of the recent important experimental developments on neutrino mixing (hints for sterile neutrinos, large $θ_{13}$, possible non maximal $θ_{23}$, approaching sensitivity on $δ_{CP}$) and their implications on models of neutrino mixing. The new data disfavour many models but the surviving ones still span a wide range going from Anarchy (no structure, no symmetry in the lepton sector) to a maximum of symmetry, as for the models based on discrete non-abelian flavour groups that can be improved following the indications from the data.

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