Speaker
Description
In the field of neutrino physics, the tribimaximal (TBM) mixing scheme and its associated $\mu-\tau$ symmetric texture have garnered a lot of attention due to their predictability of mixing angles and simple structures.Recent experiments, however, shown that the TBM scheme is only partially valid, particularly due to its prediction of a vanishing reactor mixing angle ($\theta_{13}=0$).This also implies that the $\mu-\tau$ symmetric texture is not a valid texture anymore as it too assumes the same value for $\theta_{13}$. To accommodate a non-zero $\theta_{13}$, many approaches use a perturbation term to break the $\mu-\tau$ symmetry, allowing a minor correction to $\theta_{13}$ while keeping the other predictions of the TBM scheme intact.
In our work, we propose a novel texture that is fundamentally different from $\mu-\tau$ symmetry, allowing $\theta_{13}$ as a free parameter instead of a correction. Our texture aligns with the TBM scheme for the predictions of other mixing angles, but is irreducible o a $\mu-\tau$ symmetric form when the perturbation is removed.The texture can predict six observational parameters using only three independent real parameters. The texture is obtained in the framework of $SU(2)_L \otimes T^/$ group via a type-1 seesaw mechanism.
