Neutrino mixing and the Frobenius group

Large Neutrino Mixing from Renormalization Group Evolution

The renormalization group evolution equation for two neutrino mixing is known to exhibit nontrivial fixed point structure corresponding to maximal mixing at the weak scale. The presence of the fixed point provides a natural explanation of the observed maximal mixing of νμ − ντ if the νμ and ντ are [email protected] [email protected] [email protected] [email protected]...

Obtaining the Neutrino Mixing Matrix with the Tetrahedral Group

(This parametrization may differ slightly from others in that we take detV23 = detV12 = −1.) The error bars are such that θ31 is consistent with 0, in which case the CP violating phase e iφ does not enter. We could suppose either that the entries in V represent a bunch of meaningless numbers (possibly varying from domain to domain in the universe as advocated by some theorists of great sophisti...

A4 Group and Tri-bimaximal Neutrino Mixing – A Renormalizable Model

The tetrahedron A4 group has been widely used in studying neutrino mixing matrix. It provides a natural framework of model building for the tri-bimaximal mixing matrix. In this class of models, it is necessary to have two Higgs fields, χ and χ′, transforming under A4 as 3 with one of them having vacuum expectation values for the three components to be equal and another having only one of the co...

Neutrino Mixing

Neutrino Mixing

In this review we present the main features of the current status of neutrino physics. After a review of the theory of neutrino mixing and oscillations, we discuss the current status of solar and atmospheric neutrino oscillation experiments. We show that the current data can be nicely accommodated in the framework of three-neutrino mixing. We discuss also the problem of the determination of the...