  It is known that baryon number inhomogeneities may arise as a consequence of
electroweak baryogenesis. Their geometry, size, and amplitude depend on the
parameters that characterize the baryogenesis mechanism, as well as on those
that determine the phase transition dynamics. We investigate this parametric
dependance. We show that in the case of the minimal supersymmetric standard
model, the geometry of the inhomogeneities most probably consists of spherical
regions of high density surrounded by low-density walls, in contrast to the
case of the minimal standard model. In this supersymmetric extension we find
that density contrasts of up to a factor of 100 may arise. This amplitude
increases for higher values of the latent heat or lower values of the bubble
wall tension, and can be significantly larger in different extensions of the
standard model. Such inhomogeneities may thus affect the dynamics of the
subsequent quark-hadron phase transition.
