Tree-level unitarity constraints in the most general two Higgs doublet model

Constraints on the two-Higgs-doublet model

The two-Higgs-doublet model provides a simple, yet interesting, generalization of the SM Higgs sector. We study the CP-conserving version of this model with general, flavor-diagonal, Yukawa couplings. Indirect constraints are obtained from flavor physics on the charged Higgs boson mass and couplings. The relation of these bounds to those for the more specialized two-Higgsdoublet model types wit...

Tree-level unitarity in Gauge-Higgs Unification

We numerically estimate a scale Λuni at which tree-level unitarity is violated in the SO(5) × U(1)X gauge-Higgs unification model by evaluating amplitudes for scattering of the longitudinal W bosons. The scattering amplitudes take larger values in the warped spacetime than in the flat spacetime, and take maximal values when θH = π/2, where θH is the Wilson line phase along the extra dimension. ...

Large tree-level CP violation in e+e--->tt-barH0 in the two-Higgs-doublet model.

In the Two - Higgs Doublet - Model

Simple Two Higgs Doublet Model