Speaker
Biswajit Karmakar
Description
The lepton mixing ansatz, known as cobimaximal mixing, still remains an allowed mixing scheme for leptons which predicts a maximal value for the atmospheric mixing angle ($\theta_{23}=45^{\circ}$) and the Dirac CP phase is fixed at $\delta=\pm 90^{\circ}$. Here we analyze a minimal model to understand the cobimaximal lepton mixing based on $A_4$ non-Abelian discrete flavor symmetry. Tiny neutrino mass and mixing is obtained by relying on such a flavor symmetric type-I seesaw mechanism. Subsequently, we study the associated phenomenology and predict the absolute neutrino mass and effective neutrino mass parameter responsible for neutrinoless double-beta decay. We further comment on the lepton asymmetry of the universe in this context.
Author
Biswajit Karmakar
