  The fundamental couplings of the Standard Model are known to vary as a
function of energy scale through the Renormalisation Group (RG), and have been
measured at the electroweak scale at colliders. However, the variation of the
couplings as a function of temperature need not be the same, raising the
possibility that couplings in the early universe were not at the values
predicted by RG evolution. We study how such temperature-variance of
fundamental couplings can aid the production of a baryon asymmetry in the
universe through electroweak baryogenesis. We do so in the context of the
Standard Model augmented by higher-dimensional operators up to dimension 6.
