New approach to neutrino masses and leptogenesis with Occam's razor

Abstract

The minimal type-I seesaw framework with texture-zero Yukawa and mass matrices inspired by Occam's razor is incompatible with normally-ordered neutrino masses (currently preferred by data) when lepton mixing originates solely from the neutrino sector. Moreover, the lightest right-handed neutrino mass required to generate the observed baryon asymmetry of the Universe via leptogenesis ($M_1\sim 10^{14}$ GeV) is in conflict with vanilla scenarios for Peccei-Quinn) axion dark matter where the reheating temperature of the Universe is typically below $10^{12}$ GeV. In this work, we present a new Occam's razor setup which overcomes these problems by including charged-lepton mixing parametrized by a single angle, which is predicted to be very close to the quark Cabibbo angle. Furthermore, the atmospheric mixing angle lies in the second octant and the leptogenesis scale is lowered to $\sim 5.5\times 10^{10}$ GeV, lifting the tension with the axion dark-matter hypothesis.

arXiv comment7 pages; 4 figures. Results updated in view of the new T2K and Nova data. Matches version to appear in PRD

References in corpus (43)

• Planck 2015 results. XIII. Cosmological parameters
• Oscillating neutrinos and mu --> e, gamma
• Non-Abelian Discrete Symmetries in Particle Physics
• Leptogenesis for Pedestrians
• Towards a complete theory of thermal leptogenesis in the SM and MSSM
• CP violating decays in leptogenesis scenarios
• Status of neutrino oscillations 2018: first hint for normal mass ordering and improved CP sensitivity
• Baryogenesis through leptogenesis
• The importance of flavor in leptogenesis
• Flavour Issues in Leptogenesis
• Cosmological Sign of Neutrino CP Violation
• Constraint on the Matter-Antimatter Symmetry-Violating Phase in Neutrino Oscillations
• Flavour Matters in Leptogenesis
• Axion dark matter from topological defects
• First measurement of neutrino oscillation parameters using neutrinos and antineutrinos by NOvA
• Flavor structures of charged fermions and massive neutrinos
• Large Mixing Angle MSW and Atmospheric Neutrinos from Single Right-Handed Neutrino Dominance and U(1) Family Symmetry
• Neutrino Phenomenology -- the case of two right handed neutrinos
• Unified Models of Neutrinos, Flavour and CP Violation
• Leptonic CP violation
• Neutrino Masses, Lepton Flavor Mixing and Leptogenesis in the Minimal Seesaw Model
• Sneutrino Inflation in the Light of WMAP: Reheating, Leptogenesis and Flavour-Violating Lepton Decays
• Radiatively induced leptogenesis in a minimal seesaw model
• Addendum to: Global constraints on absolute neutrino masses and their ordering
• Naturalness, Vacuum Stability and Leptogenesis in the Minimal Seesaw Model
• Seesaw Mechanism with Occam's Razor
• Leptogenesis in the two right-handed neutrino model revisited
• Neutrino masses and mixing: a flavour symmetry roadmap
• Calculable CP-violating Phases in the Minimal Seesaw Model of Leptogenesis and Neutrino Mixing
• Neutrino mass matrices with one texture zero and a vanishing neutrino mass
• The minimal type-I seesaw model with maximally-restricted texture zeros
• Combining texture zeros with a remnant CP symmetry in the minimal type-I seesaw
• Towards the minimal seesaw model via CP violation of neutrinos
• Implications of residual CP symmetry for leptogenesis in a model with two right-handed neutrinos
• Perturbed Yukawa Textures in the Minimal Seesaw Model
• Neutrino CP violation and sign of baryon asymmetry in the minimal seesaw model
• Lepton Flavour Symmetries
• Consequences of minimal seesaw with complex $\mu \tau$ antisymmetry of neutrinos
• Radiative leptogenesis in minimal seesaw models
• $\mu -\tau$ Reflection Symmetry and Its Explicit Breaking for Leptogenesis in a Minimal Seesaw Model
• Seesaw Scale and CP Phases in a Minimal Model of Leptogenesis
• Texture Zero Neutrino Models and Their Connection with Resonant Leptogenesis
• Towards the minimal seesaw model for the prediction of neutrino CP violation

Cited by in corpus (7)

• Leptonic Unitarity Triangles
• Minimal scoto-seesaw mechanism with spontaneous CP violation
• Scalar-singlet assisted leptogenesis with CP violation from the vacuum
• Particular textures of the minimal seesaw model
• Flavored Peccei-Quinn symmetries in the minimal $\nu$DFSZ model
• Is magic texture for Majorana neutrino immanent in Dirac nature?
• Modified TM2 for Reproducing All Best-Fit Values of Neutrino Mixing Angles