Novel effects in electroweak breaking from a hidden sector

The Higgs boson offers a unique window to hidden sector fields S-i, singlets under the standard model gauge group, via the renormalizable interactions vertical bar H vertical bar S-2(i)2. We prove that such interactions can provide new patterns for electroweak breaking, including radiative breaking by dimensional transmutation consistent with CERN LEP bounds, and trigger the strong enough first-order phase transition required by electroweak baryogenesis.