Speaker
Description
[This is talk will be on Phys.Rev. D100 (2019) no.3, 035009 by Soumita Pramanick]
Using $S3\times Z_2$ symmetry a scotogenic model for realistic neutrino mixing
at one-loop level will be discussed. In this model, there are two right-handed neutrinos.
It was found when these two right-handed neutrinos are mixed maximally one can obtain the
form of the left-handed Majorana neutrino mass matrix with $\theta_{13}=0$, $\theta_{23}=\pi/4$
and the solar mixing $\theta_{12}$ can have any value like that of Tribimaximal (TBM), Bimaximal (BM) and Golden Ratio (GR) or any other mixing scenario.
A little shift from the maximal mixing between the two right-handed neutrino states can yield the
realistic neutrino mixing angles i.e., non-zero $\theta_{13}$, deviation of $\theta_{23}$ from $\pi/4$
and small corrections to $\theta_{12}$.
Thus this scotogenic mechanism at one-loop level produces non-zero $\theta_{13}$ by shifting from maximal
mixing between the two-right handed neutrinos. The model also has two inert $SU(2)_L$ doublet scalars odd under $Z_2$, the lightest among which can become a dark matter.
