Saturating the Bound on the Scale of Fermion Mass Generation

Details Saturating the Bound on the Scale of Fermion Mass Generation Saturating the Bound on the Scale of Fermion Mass Generation

1998-07-17

arxiv.org/abs/hep-ph/9807406v2

Phys.Lett. B439 (1998) 389-392

Physics

High Energy Physics

High Energy Physics - Phenomenology

7 pages, Latex (minor typo fixed)

Scientific paper

Recently, Jaeger and Willenbrock have shown that the Appelquist and Chanowitz bound on the scale of top-quark mass generation can formally be saturated in a particular limit of a two-Higgs doublet model. In this note I present an alternate derivation of their result. I perform a coupled channel analysis for f fbar to V_L V_L and V_L V_L to V_L V_L scattering and derive the conditions on the parameters required for f fbar to V_L V_L scattering to be relevant to unitarity. I also show that it is not possible to saturate the bound on fermion mass generation in the two-Higgs model while maintaining tree-level unitarity in Higgs scattering at high energies.

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