Flavour from accidental symmetries

Abstract

We consider a new approach to fermion masses and mixings in which no special "horizontal" dynamics is invoked to account for the hierarchical pattern of charged fermion masses and for the peculiar features of neutrino masses. The hierarchy follows from the vertical, family-independent structure of the model, in particular from the breaking pattern of the Pati-Salam group. The lightness of the first two fermion families can be related to two family symmetries emerging in this context as accidental symmetries.

15 pages, 1 eps figure, references added

References in corpus (13)

• Large Mixing Angle MSW and Atmospheric Neutrinos from Single Right-Handed Neutrino Dominance and U(1) Family Symmetry
• The Unitarity Triangle Fit in the Standard Model and Hadronic Parameters from Lattice QCD: A Reappraisal after the Measurements of Delta m_s and BR(B to tau nu)
• Predictions from an Anomalous U(1) Model of Yukawa Hierarchies
• Atmospheric and Solar Neutrinos with a Heavy Singlet
• Fermion Masses and Mixing Angles from SU(3) Family Symmetry
• Constructing the large mixing angle MNS matrix in see-saw models with right-handed neutrino dominance
• Fermion Masses and Mixing Angles from SU(3) Family Symmetry and Unification
• Atmospheric and Solar Neutrinos from Single Right-Handed Neutrino Dominance and U(1) Family Symmetry
• String loop corrected hypermultiplet moduli spaces
• Large neutrino mixing angles in unified theories
• Nonabelian Discrete Symmetries, Fermion Mass Textures and Large Neutrino Mixing
• Flavor without Flavor Symmetry
• A Grand Unified Supersymmetric Theory of Flavor

Cited by in corpus (20)

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• Fermion masses and mixing in models with SO(10) x A_4 symmetry
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• Origin of Quark-Lepton Flavor in SO(10) with Type II Seesaw
• Gauge coupling unification, the GUT scale, and magic fields
• $R_{K^{(\ast )}}$ with leptoquarks and the origin of Yukawa couplings
• Doubly Lopsided Mass Matrices from Unitary Unification
• A Domino Theory of Flavor
• Origin of Yukawa couplings for Higgs and leptoquarks
• Tri-unification: a separate $SU(5)$ for each fermion family
• Can an unbroken flavour symmetry provide an approximate description of lepton masses and mixing?
• Consequences of a unified, anarchical model of fermion masses and mixings
• Discovering the Origin of Yukawa Couplings at the LHC with a Singlet Higgs and Vector-like Quarks
• Spontaneously stabilised dark matter from a fermiophobic $U(1{)}^{\prime }$ gauge symmetry
• Neutrino-2008: Where are we? Where are we going?
• Quark and Lepton Mass and Mixing with non-universal $Z^{\prime }$ from a 5d Standard Model with gauged $SO(3)$
• An Unfamiliar Way to Generate the Hierarchy of Standard Model Fermion Masses
• A minimal axion model for mass matrices with five texture-zeros
• New Physics Hints from Flavour