The electroweak phase transition with a singlet

Details The electroweak phase transition with a singlet The electroweak phase transition with a singlet

1993-01-27

arxiv.org/abs/hep-ph/9301285v1

Phys.Lett. B305 (1993) 98-105

Physics

High Energy Physics

High Energy Physics - Phenomenology

11 pages (plus 5 figures.ps available upon request), latex, IEM-FT-67/93

Scientific paper

10.1016/0370-2693(93)91111-Y

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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