Hierarchical versus degenerate 2HDM: The LHC run 1 legacy at the onset of run 2

Current discussions of the allowed two-Higgs-doublet model parameter space after LHC run 1 and the prospects for run 2 are commonly phrased in the context of a quasidegenerate spectrum for the new scalars. Here, we discuss the generic situation of a two-Higgs-doublet model with a nondegenerate spect...

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Veröffentlicht in:Physical review. D 2016-06, Vol.93 (11), Article 115033
Hauptverfasser: Dorsch, G. C., Huber, S. J., Mimasu, K., No, J. M.
Format: Artikel
Sprache:eng
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Zusammenfassung:Current discussions of the allowed two-Higgs-doublet model parameter space after LHC run 1 and the prospects for run 2 are commonly phrased in the context of a quasidegenerate spectrum for the new scalars. Here, we discuss the generic situation of a two-Higgs-doublet model with a nondegenerate spectrum for the new scalars. This is highly motivated from a cosmological perspective since it naturally leads to a strongly first-order electroweak phase transition that could explain the matter-antimatter asymmetry in the Universe. While constraints from measurements of Higgs signal strengths do not change, those from searches of new scalar states get modified dramatically once a nondegenerate spectrum is considered.
ISSN:2470-0010
2470-0029
DOI:10.1103/PhysRevD.93.115033