Do precision electroweak constraints guarantee $\text{epem}$ collider discovery of at least one Higgs boson of a type-II two-Higgs-doublet model?

Abstract

The manner in which the parameters of a two-Higgs-doublet model can be chosen so that no Higgs boson is discovered at a $\sqrt{s}\le 800\text{gev}$ $\text{epem}$ collider, while maintaining consistency with current precision electroweak measurements, is described. The importance of a Giga-$Z$ factory and higher collider energies for such a scenario is emphasized.

Comments: 6 pages, 3 figures