Beyond MFV in family symmetry theories of fermion masses

Abstract

Minimal Flavour Violation (MFV) postulates that the only source of flavour changing neutral currents and CP violation, as in the Standard Model, is the CKM matrix. However it does not address the origin of fermion masses and mixing and models that do usually have a structure that goes well beyond the MFV framework. In this paper we compare the MFV predictions with those obtained in models based on spontaneously broken (horizontal) family symmetries, both Abelian and non-Abelian. The generic suppression of flavour changing processes in these models turns out to be weaker than in the MFV hypothesis. Despite this, in the supersymmetric case, the suppression may still be consistent with a solution to the hierarchy problem, with masses of superpartners below 1 TeV. A comparison of FCNC and CP violation in processes involving a variety of different family quantum numbers should be able to distinguish between various family symmetry models and models satisfying the MFV hypothesis.

34 pages, no figures

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Cited by in corpus (10)

• On The Potential of Minimal Flavour Violation
• The Messenger Sector of SUSY Flavour Models and Radiative Breaking of Flavour Universality
• Family symmetries and alignment in multi-Higgs doublet models
• Flavour in supersymmetry: horizontal symmetries or wave function renormalisation
• From Flavour to SUSY Flavour Models
• Effective Theories of Flavor and the Non-Universal MSSM
• The Challenges of Flavour Physics
• Flavour Theory and the LHC Era
• A Light Dynamical Scalar Boson
• Flavor hierarchies with nonminimal irreducible representations