A New Approach to Flavor Symmetry and an Extended Naturalness Principle

Abstract

A class of non-supersymmetric extensions of the Standard Model is proposed in which there is a multiplicity of light scalar doublets in a multiplet of a non-abelian family group with the Standard Model Higgs doublet. Anthropic tuning makes the latter light, and consequently the other scalar doublets remain light because of the family symmetry. The family symmetry greatly constrains the pattern of FCNC and proton decay operators coming from scalar-exchange. Such models show that useful constraints on model-building can come from an extended naturalness principle when the electroweak scale is anthropically tuned.

31 pages, 3 figures

References in corpus (3)

• Flavor Changing Neutral Higgs Bosons in a Supersymmetric Extension based on a $Q_6$ Family Symmetry
• Anthropic tuning of the weak scale and of m_u/m_d in two-Higgs-doublet models
• Nuclear Astrophysics of Worlds in the String Landscape

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• Unification Predictions With or Without Supersymmetry
• Higgs Multiplets of the Quark-Lepton Family Group
• Higgs-Flavor Groups, Naturalness, and Dark Matter