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Beyond MFV in family symmetry theories of fermion masses

  • Zygmunt Lalak
  • Stefan Pokorski
  • Graham G. Ross
Open Access
Article

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.

Keywords

Beyond Standard Model Quark Masses and SM Parameters Supergravity Models 

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Copyright information

© The Author(s) 2010

Open Access This article is distributed under the terms of the Creative Commons Attribution License which permits any use, distribution and reproduction in any medium, provided the original author(s) and source are credited.

Authors and Affiliations

  • Zygmunt Lalak
    • 1
  • Stefan Pokorski
    • 1
    • 4
  • Graham G. Ross
    • 2
    • 3
  1. 1.Physics DepartmentUniversity of Warsaw, Institute of Theoretical PhysicsWarsawPoland
  2. 2.CERNGeneva 23Switzerland
  3. 3.Rudolf Peierls Centre for Theoretical PhysicsUniversity of OxfordOxfordU.K.
  4. 4.Hans Fischer Senior Fellow, Institute for Advanced StudiesTechnical UniversityMunichGermany

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