Leptonic Dynamical Yukawa Couplings

Abstract

A dynamical origin of the Yukawa couplings is a promising scenario to explain the flavour puzzle. The focus of this letter is set on the role of the neutrino Majorana character: when an $O(2{)}_{N_R}$ flavour symmetry acts on the right-handed neutrino sector, the minimum of the scalar potential allows for large mixing angles -in contrast to the simplest quark case- and predicts a maximal Majorana phase. This leads to a strong correlation between neutrino mass hierarchy and mixing pattern. Realistic solutions point to the existence of three heavy right-handed neutrinos.

8 pages. V2: references added; results unchanged

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• Revisiting Minimal Lepton Flavour Violation in the Light of Leptonic CP Violation
• Gauged Lepton Flavour
• Spontaneous breaking of $SO(3)$ to finite family symmetries with supersymmetry - an $A_4$ model
• Distinguishing A Higgs-Like Dilaton Scenario With A Complete Bosonic Effective Field Theory Basis
• Dynamical flavor origin of ${\mathbb{Z}}_N$ symmetries
• The Flavor-locked Flavorful Two Higgs Doublet Model
• Baryon Non-Invariant Couplings in Higgs Effective Field Theory
• Predictive Leptogenesis from Minimal Lepton Flavour Violation
• A New bound on CP Violation in the $\tau$ Lepton Yukawa Coupling and electroweak baryogenesis
• Data Driven Flavour Model
• Searching for BSM Physics in Yukawa Couplings and Flavour Symmetries
• Leptogenesis and $CP$ violation in $SU(5)$ models with lepton flavor mixing originating from the right-handed sector
• Lepton-flavour violation in a Pati-Salam model with gauged flavour symmetry
• Standard model flavor from an $SU(2)$ symmetry
• Combining Pati-Salam and Flavour Symmetries
• Low-scale Leptogenesis with Minimal Lepton Flavour Violation
• Neutrino and Charged Lepton Flavour Today
• Fermion Masses and Mixings from a Minimum Principle
• A Bottom-Up Approach: The Data Driven Flavour Model
• Neutrino Masses and Mixings from Continuous Symmetries