Common origin of ${\theta }_{13}$ and dark matter within the flavor symmetric scoto-seesaw framework

Abstract

To understand the observed pattern of neutrino masses and mixing as well as to account for the dark matter we propose a hybrid scoto-seesaw model based on the $A_4$ discrete flavor symmetry. In this setup, including at least two heavy right-handed neutrinos is essential to employ the discrete flavor symmetry that mimics once popular tribimaximal neutrino mixing at the leading order via type-I seesaw. The scotogenic contribution then acts as a critical deviation to reproduce the observed value of the reactor mixing angle ${\theta }_{13}$ (within the trimaximal mixing scheme) and to accommodate potential dark matter candidates, pointing towards a common origin of ${\theta }_{13}$ and dark matter. The model predicts the atmospheric angle to be in the upper octant, excludes some regions on the Dirac CP phase, and restricts the Majorana phases too. Further, normal and inverted mass hierarchies can be distinguished for specific values of the relative phases associated with the complex light neutrino mass matrix. Owing to the considered flavor symmetry, contributions coming from the scotogenic mechanism towards the lepton flavor violating decays such as $\mu \to e\gamma$, $\tau \to e\gamma$ vanish, and a lower limit on the second right-handed neutrino mass can be obtained. Prediction for the effective mass parameter appearing in the neutrinoless double beta decay falls within the sensitivity of future experiments such as LEGEND-1k and nEXO.

42 pages, 16 figures, 6 tables ; Version accepted for publication in JHEP

References in corpus (26)

• Phenomenology with Massive Neutrinos
• From the trees to the forest: a review of radiative neutrino mass models
• Possible Alternatives to Tri-bimaximal Mixing
• The Inert Dark Matter
• The golden ratio prediction for the solar neutrino mixing
• A predictive A4 model, Charged Lepton Hierarchy and Tri-bimaximal Sum Rule
• Probing the scotogenic model with lepton flavor violating processes
• A model for trimaximal lepton mixing
• Tri-bimaximal Neutrino Mixing and Flavor-dependent Resonant Leptogenesis
• S_4 Flavor Symmetry Embedded into SU(3) and Lepton Masses and Mixing
• Nonzero U_{e3}, CP violation and leptogenesis in a see-saw type softly broken A_4 symmetric model
• A(4) Flavor Symmetry Model for Dirac-Neutrinos and Sizable U(e3)
• Ultraviolet Completion of Flavour Models
• Scotogenic $A_4$ Neutrino Model for Nonzero ${\theta }_{13}$ and Large ${\delta }_{CP}$
• Resonant leptogenesis and tribimaximal leptonic mixing with A4 symmetry
• Nonzero ${\theta }_{13}$ and Leptogenesis in a Type-I See-saw Model with $A_4$ Symmetry
• The Interplay Between the "Low" and "High" Energy CP-Violation in Leptogenesis
• Quark-lepton complementarity and tribimaximal neutrino mixing from discrete symmetry
• Non-Abelian Discrete Groups from the Breaking of Continuous Flavor Symmetries
• Lepton flavor at the electroweak scale: A complete A4 model
• Compatibility of theta13 and the Type I Seesaw Model with A4 Symmetry
• Predicting CP violation in Deviation from Tri-bimaximal mixing of Neutrinos
• An A4 x Z4 model for neutrino mixing
• Reactor mixing angle from hybrid neutrino masses
• Minimal modifications to the Tri-Bimaximal neutrino mixing
• Discrete flavor symmetry and minimal seesaw mechanism