  The Higgs boson offers a unique window to hidden sector fields S_i, singlets
under the Standard Model gauge group, via the renormalizable interactions |H|^2
S_i^2. We prove that such interactions can provide new patterns for electroweak
breaking, including radiative breaking by dimensional transmutation consistent
with LEP bounds, and trigger the strong enough first order phase transition
required by electroweak baryogenesis.
