Speaker
Description
In the constrained sequential dominance (CSD), tri-bimaximal mixing (TBM)
pattern in the neutrino sector has been explained, by proposing a certain
Yukawa coupling structure for the right-handed neutrinos of the model.
However, from the current experimental data it is known that the values
of neutrino mixing angles are deviated from the TBM values. In order to
explain this neutrino mixing, we first propose a phenomenological model
where we consider Yukawa couplings which are modified from that of CSD.
Essentially, we add small complex parameters to
the Yukawa couplings of CSD. Using these modified Yukawa couplings, we
demonstrate that neutrino mixing angles can deviate from their TBM values.
We also construct a model, based on a flavor symmetry, in order to justify
the modified form of Yukawa couplings of our work.
