Preprint · arXiv · December 31, 1998
Electric charge breaking in two stage phase transitions of models with two Higgs doublets
A.B. Lahanas, Vassilis C. Spanos, Vasilios Zarikas
Abstract
We discuss the features of a two Higgs doublet model exhibiting a two stage phase transition in the presence of soft terms in the scalar potential. Such terms are necessary in order to explain the observed baryon asymmetry $\\Delta B$ in the Universe. At finite temperatures electric charge violating stationary points are developed. In conjuction with CP violation in the Higgs or the Yukawa sector, the phase transition to the charge conserving vacuum, generates a net charge asymmetry $\\Delta Q$, which may be well above the astrophysical bounds put on $\\Delta Q$. The model is of relevance for supersymmetric extensions of the Standard Model, since it shares the characteristic features of such extensions namely two Higgs doublets and similar CP violating sources.
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