1203.1593 (Kim Siyeon)

Non-vanishing $U_{e3}$ under $S_3$ symmetry    [PDF]

Kim Siyeon

This work proposes a neutrino mass model that predicts non-zero $\theta_{13}$ under the non-Abelian discrete flavor symmetry $\mathbb{S}_3\otimes\mathbb{Z}_2$. We stress that the non-vanishing angle is based on the flavor symmetry, not on a deviation from TBM. By changing the charge assignment of righthanded neutrinos, the difference between a model with $U_{e3} = 0$ and one with $U_{e3} \neq 0$ is understood as a group theoretical consequence. The 5 dimensional effective theory of Majorana neutrinos obtained in this framework is tested with phenomenological bounds in the parametric spaces $\sin\theta_{23}, \sin\theta_{12}$ and $m_2/m_3$ vs. $\sin\theta_{13}$.

View original: http://arxiv.org/abs/1203.1593