Abstract
We investigate origin of three features that are often assumed in analysis of two-Higgs doublet models: (i) softly broken Z 2 symmetry, (ii) CP invariant Higgs potential, and (iii) degenerated mass spectra. We extend electroweak gauge symmetry, introducing extra gauge symmetry and extra scalars, and we show that our models effectively derive two-Higgs doublet models at low energy which naturally hold the three features. We also find that the models can solve the strong CP problem.
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Abe, T., Omura, Y. Emergent two-Higgs doublet models. J. High Energ. Phys. 2016, 21 (2016). https://doi.org/10.1007/JHEP08(2016)021
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DOI: https://doi.org/10.1007/JHEP08(2016)021