Voce esta aquiA natural explanation for large neutrino mixing
A natural explanation for large neutrino mixing
The origin of small mixing among quarks and a large mixing in the neutrino sector poses an intriguing open question. Among many approaches to answer this question the ‘high scale mixing unification’ (HSMU) hypothesis is a natural one. The central idea of HSMU hypothesis is that the quark and the leptonic mixing angles can be unified at some high scale, typically at GUT scale, either due to some quark-lepton symmetry or some other underlying mechanism. The large leptonic mixing angles are obtained through the renormalization group (RG) evolution of the corresponding mixing parameters from the unification scale to the low scale. This hypothesis nicely explains the mixing pattern in the neutrino sector including the recent observation of nonzero but small value of θ13. In this talk, I will try to elaborate the HSMU hypothesis in the context of both Dirac as well as Majorana neutrinos and discuss the phenomenology of various parameters.