An $A_4$ realization of inverse seesaw: neutrino masses, ${\theta }_{13}$ and leptonic non-unitarity

Abstract

We provide an $A_4$ based flavor symmetric scenario to accommodate the inverse seesaw mechanism for explaining light neutrino masses and mixing. We find that the lepton mixing, in particular the tri-bimaximal mixing pattern and its deviation through nonzero ${\theta }_{13}$, is originated solely from the flavor structure of the lepton number violating contribution of the neutral lepton mass matrix. Here we discuss in detail how a nonzero value of ${\theta }_{13}$ is correlated with the other parameters in the framework and its impact on the Dirac CP phase $\delta$. We also analyze the non-unitarity effects on lepton mixing matrix and its implication in terms of the lepton flavor violating decays, etc..

35 pages, 15 figures, version published in PRD

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• Flavored Non-Minimal Left-Right Symmetric Model Fermion Masses and Mixings
• Common origin of ${\theta }_{13}$ and dark matter within the flavor symmetric scoto-seesaw framework
• Low scale type I seesaw model for lepton masses and mixings
• Low energy phenomena of the lepton sector in an $A_4$ symmetry model with heavy inverse seesaw neutrinos
• Consequences of $\mu$-$\tau$ reflection symmetry for $3+1$ neutrino mixing
• Fully constrained mass matrix: Can symmetries alone determine the flavon vacuum alignments?
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• Some Phenomenologies of a Simple Scotogenic Inverse Seesaw Model
• Flavored Leptogenesis and Neutrino Mass with $A_4$ Symmetry
• An extended 3-3-1 model with two scalar triplets and linear seesaw mechanism
• Planck Scale Origin of Non-zero ${\theta }_{13}$ and Super-WIMP Dark Matter
• Exploring the feasibility of the charged lepton flavor violating decay $\mu \to e+\gamma$ in inverse and linear seesaw mechanisms with $A_4$ flavour symmetry
• Rescuing leptogenesis in inverse seesaw models with the help of non-Abelian flavor symmetries
• Fermion masses and mixings and charged lepton flavor violation in a 3-3-1 model with inverse seesaw
• Leptogenesis in the littlest inverse seesaw model