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arXiv · hep-ph/9301285

The electroweak phase transition with a singlet

J. R. Espinosa·M. Quirós
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Abstract

We study the electroweak phase transition in the minimal extension of the Standard Model: an extra complex singlet with zero vacuum expectation value. The first-order phase transition is strengthened by the cubic term triggered in the one-loop effective potential by the extra boson. Plasma effects are considered to leading order: they shield the cubic terms and weaken the first-order phase transition. We find a region in the parameter space where baryon asymmetry washout is avoided for Higgs masses consistent with present experimental bounds. However in that region the theory becomes non-perturbative for scales higher than $10^{10}\ GeV$.

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J. R. Espinosa, M. Quirós. 1993-01-27. The electroweak phase transition with a singlet. https://doi.org/10.1016/0370-2693(93)91111-y

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