Flavoured leptogenesis and ${\mathrm{CP}}^{\mu \tau }$ symmetry

Abstract

We present a systematic study of leptogenesis in neutrino mass models with $\mu \tau$-flavoured CP symmetry. In addition to the strong hierarchical $N_1$-dominated scenario ($N_1$DS) in the `two flavour regime' of leptogenesis, we show that one may choose the right-handed (RH) neutrino mass hierarchy as mild as $M_2\simeq 4.7M_1$ for a perfectly valid hierarchical $N_1$DS. This in turn reduces the lower bound on the allowed values of $M_1$, compared to what is stated in the literature. The consideration of flavour effects due to the heavy neutrinos also translate into an upper bound on $M_1$. It is only below this bound that the observed baryon-to-photon ratio can be realized for a standard $N_1$ domination, else a substantial part of the parameter space is also compatible with $N_2$DS. We deduce conditions under which the baryon asymmetry produced by the second RH neutrino plays an important role. Finally, we discuss another interesting scenario where lepton asymmetry generated by $N_2$ in the two flavour regime faces washout by $N_1$ in the three flavour regime. Considering a hierarchical light neutrino mass spectrum, which is now favoured by cosmological observations, we show that at the end of $N_1$-leptogenesis, the asymmetry generated by $N_2$ survives only in the electron flavour and around $33\%$ of the parameter space is consistent with a pure $N_2$-leptogenesis.

arXiv comment31 pages, 14 figures, minor changes, references added, to appear in JHEP

References in corpus (93)

• Leptogenesis
• Discrete Flavor Symmetries and Models of Neutrino Mixing
• Non-Abelian Discrete Symmetries in Particle Physics
• A lower bound on the right-handed neutrino mass from leptogenesis
• Resonant Leptogenesis
• Leptogenesis for Pedestrians
• Towards a complete theory of thermal leptogenesis in the SM and MSSM
• Global analysis of three-flavour neutrino oscillations: synergies and tensions in the determination of theta_23, delta_CP, and the mass ordering
• Recent Progress in Baryogenesis
• Baryogenesis through leptogenesis
• The importance of flavor in leptogenesis
• Cosmological Sign of Neutrino CP Violation
• Cosmic Microwave Background, Matter-Antimatter Asymmetry and Neutrino Masses
• Mu-Tau Reflection Symmetry in Lepton Mixing and Neutrino Oscillations
• Flavour Matters in Leptogenesis
• Leptogenesis from Gravity Waves in Models of Inflation
• Production of Massive Fermions at Preheating and Leptogenesis
• Large Mixing Angle MSW and Atmospheric Neutrinos from Single Right-Handed Neutrino Dominance and U(1) Family Symmetry
• The Neutrino Mass Window for Baryogenesis
• A 2-3 Symmetry in Neutrino Oscillations
• Bimaximal Neutrino Mixing and Neutrino Mass Matrix
• Unified Models of Neutrinos, Flavour and CP Violation
• A non-standard CP transformation leading to maximal atmospheric neutrino mixing
• Flavor effects on leptogenesis predictions
• Constructing the large mixing angle MNS matrix in see-saw models with right-handed neutrino dominance
• CP and Discrete Flavour Symmetries
• Baryon Asymmetry, Neutrino Mixing and Supersymmetric SO(10) Unification
• Flavour Covariant Transport Equations: an Application to Resonant Leptogenesis
• CP Violation from Finite Groups
• Probing the seesaw mechanism with neutrino data and leptogenesis
• Broken mu-tau Symmetry and Leptonic CP Violation
• Spontaneous CP violation from vacuum alignment in $S_4$ models of leptons
• Automorphisms in Gauge Theories and the Definition of CP and P
• Discrete Flavour Symmetries, Neutrino Mixing and Leptonic CP Violation
• A Realistic Pattern of Lepton Mixing and Masses from S4 and CP
• The solar LMA neutrino oscillation solution in the Zee model
• Seesaw geometry and leptogenesis
• Nearly Tri-bimaximal Neutrino Mixing and CP Violation from mu-tau Symmetry Breaking
• Predictions of the most minimal see-saw model
• Discovery probability of next-generation neutrinoless double-$\beta$ decay experiments
• Quantum Boltzmann Equations and Leptogenesis
• The importance of N2 leptogenesis
• Leptogenesis from first principles in the resonant regime
• Lepton Flavour Violation and theta(13) in Minimal Resonant Leptogenesis
• Naturalness, Vacuum Stability and Leptogenesis in the Minimal Seesaw Model
• Neutrino Mass, Muon Anomalous Magnetic Moment, and Lepton Flavor Nonconservation
• Minimal extension of tri-bimaximal mixing and generalized Z_2 X Z_2 symmetries
• Kadanoff-Baym Approach to Flavour Mixing and Oscillations in Resonant Leptogenesis
• Leptogenesis beyond the limit of hierarchical heavy neutrino masses
• Flavor effects in leptogenesis
• Full Boltzmann equations for leptogenesis including scattering
• Leptogenesis in the two right-handed neutrino model revisited
• Generalized $\mu -\tau$ reflection symmetry and leptonic CP violation
• Three-Flavoured Non-Resonant Leptogenesis at Intermediate Scales
• Successful type I Leptogenesis with SO(10)-inspired mass relations
• Neutrino Mixing: $A_4$ Variations
• Trimaximal $\mu$-$\tau$ reflection symmetry
• The problem of the initial conditions in flavoured leptogenesis and the tauon N_2-dominated scenario
• Implications of $\mu -\tau$ Flavored CP Symmetry of Leptons
• Leptogenesis and residual CP symmetry
• Flavor and CP symmetries for leptogenesis and 0nubb decay
• A fuller flavour treatment of N_2-dominated leptogenesis
• An Asymmetric TBM Texture
• Gravitational Leptogenesis, Reheating, and Models of Neutrino Mass
• Neutrino Mixing from CP Symmetry
• Classifying CP transformations according to their texture zeros: theory and implications
• Leptogenesis in SO(10)
• Lepton asymmetry from mixing and oscillations
• Mu-tau symmetry and the Littlest Seesaw
• Purely Flavored Leptogenesis
• Mu-tau antisymmetry and neutrino mass matrices
• SO(10)-inspired solution to the problem of the initial conditions in leptogenesis
• Combining texture zeros with a remnant CP symmetry in the minimal type-I seesaw
• Masses, mixing angles and phases of general Majorana neutrino mass matrix
• Neutrino Mixing and Leptonic CP Violation from $S_4$ Flavour and Generalised CP Symmetries
• Mu-tau reflection symmetry with a texture-zero
• Mu-tau reflection symmetry with a high scale texture-zero
• Modifications to the neutrino mixing from the mu-tau reflection symmetry
• Probing maximal zero textures with broken cyclic symmetry in inverse seesaw
• A study on a minimally broken residual TBM-Klein symmetry with its implications on flavoured leptogenesis and ultra high energy neutrino flux ratios
• Consequences of minimal seesaw with complex $\mu \tau$ antisymmetry of neutrinos
• Twenty years after the discovery of $\mu -\tau$ symmetry
• Extended scaling and residual flavor symmetry in the neutrino Majorana mass matrix
• Littlest mu-tau seesaw
• Probing texture zeros with scaling ansatz in inverse seesaw
• Strong thermal $SO(10)$-inspired leptogenesis in the light of recent results from long-baseline neutrino experiments
• CP transformed mixed $\mu \tau$ antisymmetry for neutrinos and its consequences
• Baryon asymmetry via leptogenesis in a neutrino mass model with complex scaling
• Generalized ${\mathbb{Z}}_2\times {\mathbb{Z}}_2$ in Scaling neutrino Majorana mass matrix and baryogenesis via flavored leptogenesis
• Importance of generalized $\mu \tau$ symmetry and its CP extension on neutrino mixing and leptogenesis
• Phenomenological implications of the Friedberg-Lee transformation in a neutrino mass model with $\mu \tau$-flavored CP symmetry
• Representing seesaw neutrino models and their motion in lepton flavour space
• On the textures of neutrino mass matrix for maximal atmospheric mixing angle and Dirac CP phase

Cited by in corpus (12)

• Baryogenesis from ultralight primordial black holes and strong gravitational waves from cosmic strings
• Testing Super-Heavy Dark Matter from Primordial Black Holes with Gravitational Waves
• The $\mu$-$\tau$ reflection symmetry of Majorana neutrinos
• Minimal seesaw and leptogenesis with the smallest modular finite group
• Leptogenesis from the Asymmetric Texture
• Tribimaximal Mixing in the $SU(5)\times {\mathcal{T}}_{13}$ Texture
• Baryon asymmetry and lower bound on right handed neutrino mass in fast expanding Universe: an analytical approach
• Flavour effects in gravitational leptogenesis
• Predictive $S_4$ flavon model with ${\text{TM}}_1$ mixing and baryogenesis through leptogenesis
• Low-scale Resonant Leptogenesis in $SU(5)$ GUT with ${\mathcal{T}}_{13}$ Family Symmetry
• Leptogenesis in the $\mu \tau$ basis
• Gravitational wave complementarity and impact of NANOGrav data on gravitational leptogenesis: cosmic strings