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Electroweak phase transition and Higgs self-couplings in the two-Higgs-doublet model

S. W. Ham·S. K. Oh
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Abstract

We calculate both the cubic and the quartic self-couplings of the lighter scalar Higgs boson without assuming the decoupling limit in the two-Higgs-doublet model (THDM). In some regions of parameter space of the THDM where the electroweak phase transition is strongly first order, it is possible that the quartic self-coupling of the lighter scalar Higgs boson might be deviated by at least 40 % from the standard model prediction.

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S. W. Ham, S. K. Oh. 2005-02-13. Electroweak phase transition and Higgs self-couplings in the two-Higgs-doublet model. https://arxiv.org/abs/hep-ph/0502116

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