Baryon asymmetry from a two stage electroweak phase transition? |
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Authors: | Hammerschmitt A Kripfganz J Schmidt M G |
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Institution: | 1.Institut für Theoretische Physik der Universit?t, Philosophenweg 16, D-69120, Heidelberg, Germany ; |
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Abstract: | We investigate an extension of the Standard Model with a second Higgs doublet, showing a two stage phase transition. Wash-out of a baryon asymmetry after the phase transition can be easily avoided in this class of models.B+L transitions are more strongly suppressed in the intermediate phase than in the high temperature symmetric phase, however. Therefore, it becomes more difficult if not impossible to generate a sufficient baryon asymmetry during the phase transition.supported by Landes Graduierten Förderungs Gesetz |
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