The flavor puzzle in multi-Higgs models

Abstract

We reconsider the flavor problem in the models with two Higgs doublets. By studying two generation toy models, we look for flavor basis independent constraints on Yukawa couplings that will give us the mass hierarchy while keeping all Yukawa couplings of the same order. We then generalize our findings to the full three generation Standard Model. We find that we need two constraints on the Yukawa couplings to generate the observed mass hierarchy, and a slight tuning of Yukawa couplings of order 10%, much less than the Standard Model. We briefly study how these constraints can be realized, and show how flavor changing currents are under control for $K-\bar{K}$ mixing in the near-decoupling limit.

26 pages, typos are corrected, references are added, the final version

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Cited by in corpus (16)

• Theory and phenomenology of two-Higgs-doublet models
• Collider Signatures of Flavorful Higgs Bosons
• Is the Higgs Mechanism of Fermion Mass Generation a Fact? A Yukawa-less First-Two-Generation Model
• Higgs bosons with large couplings to light quarks
• Rare Top Decays as Probes of Flavorful Higgs Bosons
• Relating B_s Mixing and B_s -> mu+mu- with New Physics
• Explaining $(g-2{)}_{\mu }$ with Multi-TeV Sleptons
• The Flavor-locked Flavorful Two Higgs Doublet Model
• Searching for super-WIMPs in leptonic heavy meson decays
• Custodial SO(4) symmetry and CP violation in N-Higgs-doublet potentials
• Flavorful Two Higgs Doublet Models with a Twist
• Doubly Blind Spots in Scalar Dark Matter Models
• Stability of the Standard Model Vacuum with Vector-Like Leptons: A Critical Examination
• A lepton model with nearly Cobimaximal mixing
• Relating B_s Mixing and B_s->mu+mu- with New Physics - An Update
• The Deconstruction of Flavor in the Privately Democratic Higgs Sector