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Yukawa alignment from natural flavor conservation
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We study the charged Higgs couplings to fermions in the "democratic" three-Higgs-doublet model, in which one doublet couples to down-type quarks, one to up-type quarks, and one to charged leptons. Flavor-changing neutral Higgs couplings are absent because the Glashow-Weinberg-Paschos condition for natural flavor conservation is in effect. We show that this model reproduces the coupling structure of the charged Higgs boson in the recently-proposed Yukawa-aligned two-Higgs-doublet model, with two subtle constraints that arise from the unitarity of the charged Higgs mixing matrix. Adding a fourth Higgs doublet with no couplings to fermions eliminates these constraints.
Forward citations
Cited by 2 Pith papers
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Correlating Resonant Di-Higgs and Tri-Higgs Production to $H\to VV$ in the 2HDM
In the decoupling limit of the 2HDM, a heavy Higgs boson's decays to two Higgs bosons and to Z/W pairs are predicted to have a fixed ratio of about 9.5, independent of Yukawa and scalar-potential parameters.
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Flavor Constraints in a Generational Three Higgs Doublet Model
A generational three-Higgs-doublet model is constructed, and flavor constraints show that its additional Higgs bosons can be as light as about 1.5 TeV if the only flavor violation is the minimal amount needed to repro...
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