Natural Top-Bottom Mass Hierarchy in Composite Higgs Models
Abstract
We consider composite two-Higgs doublet models based on gauge-Yukawa theories with strongly interacting fermions generating the top-bottom mass hierarchy. The model features a single "universal" Higgs-Yukawa coupling, g , which is identified with the top quark g gt O(1) . The top-bottom mass hierarchy arises by soft breaking of a Z2 symmetry by a condensate of strongly interacting fermions. A mass splitting between vector-like masses of the confined techni-fermions controls this top-bottom mass hierarchy. This mechanism can be present in a variety of models based on vacuum misalignment. For concreteness, we demonstrate it in a composite two-Higgs scheme.
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