  Theoretical arguments suggest that the Higgs sector of the standard model is
an effective theory. We parametrize the new physics by means of an effective
Lagrangian technique and study its effect on the energy of the electroweak
sphaleron. We found that in the presence of a certain class of higher dimension
operators the sphaleron energy becomes arbitrarily large as the Higgs boson
mass increases. The physical meaning of this result and its implications to the
electroweak baryogenesis in the dynamical models are discussed.

High Energy Physics - Phenomenology