Active and sterile neutrino phenomenology with $A_4$ based minimal extended seesaw

Abstract

We study a model of neutrino within the framework of the minimal extended seesaw (MES), which plays an important role in active and sterile neutrino phenomenology in (3+1) scheme. The $A_4$ flavor symmetry is augmented by an additional $Z_4\times Z_3$ symmetry to constraint the Yukawa Lagrangian of the model. We use non-trivial Dirac mass matrix, with broken $\mu -\tau$ symmetry, as the origin of leptonic mixing. Interestingly, such a structure of mixing naturally leads to the non-zero reactor mixing angle ${\theta }_{13}$. Non-degenerate mass structure for right-handed neutrino $M_R$ is considered so that we can further extend our study to Leptogenesis. We have also considered three different cases for sterile neutrino mass, $M_S$ to check the viability of this model, within the allowed $3\sigma$ bound in this MES framework.

V2; Accepted in Nuclear Physics B

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• $B-L$ model with $A_4\times Z_3\times Z_4$ symmetry for $3+1$ active$-$sterile neutrino mixing
• Deviation from Tribimaximal mixing using $A_4$ flavour model with five extra scalars
• Phenomenology of $keV$ sterile neutrino in minimal extended seesaw
• Neutrino Phenomenology and Dark matter in an $A_4$ flavour extended B-L model
• Lepton masses and mixings, and muon anomalous magnetic moment in an extended $B-L$ model with type I seesaw mechanism
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• Theoretical and phenomenological consequences of active and sterile neutrino within Beyond Standard Model framework
• Dirac CP phases in a 3+1 neutrino scenario with $\mu -\tau$ symmetry
• Non-SUSY Lepton Flavor Model with 3HDM