2026-07-072026-07-07http://salesiana.dossiersoluciones.com/handle/123456789/186958In the standard Higgs model of electroweak symmetry breaking, the Higgs boson is associated with both vector-boson and fermion mass generation. In contrast, we discuss a two-Higgs-doublet model in which these masses are associated with two different scalar bosons. We show that the Higgs boson associated with vector-boson mass generation produces a {\it dip\/} in the cross section for $t\bar t\to ZZ$ via a final-state interaction. Such a dip will be difficult to observe at the LHC/SSC.15 pages, FERMILAB--PUB--92/27--THigh Energy Physics - Phenomenologytext