Higgsonium

We suggest that the formation of bound states of Higgs bosons might be the first indication of the transition of the electroweak interactions to a strongly interacting regime. As an example, we construct an explicit model with two Higgs boson doublets where such bound states actually appear. Attractive Yukawa forces are responsible for the binding. We briefly discuss the expected phenomenology associated to their production and decay at future high energy e+e- and pp colliders. © 1991.