Degenerate scalar scenario of two Higgs doublet model with a complex singlet scalar
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| Format: | Preprint |
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2024
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| _version_ | 1866929681410818048 |
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| author | Cho, Gi-Chol Idegawa, Chikako |
| author_facet | Cho, Gi-Chol Idegawa, Chikako |
| contents | We study the two Higgs doublet model with a complex singlet scalar whose imaginary part acts as dark matter (DM). The scattering of DM and quarks, mediated by three CP-even scalars in this model, is suppressed when masses of CP-even scalars are degenerate; that is called the ``degenerate scalar scenario''. Based on this scenario, we show that the strong first-order electroweak phase transition (EWPT) can be achieved without conflicting with constraints from the DM relic density and the direct detection experiments. We also discuss a shift of scalar trilinear coupling from the Standard Model prediction, which could be a test of this model in collider experiments. |
| format | Preprint |
| id |
arxiv_https___arxiv_org_abs_2410_14328 |
| institution | arXiv |
| publishDate | 2024 |
| record_format | arxiv |
| spellingShingle | Degenerate scalar scenario of two Higgs doublet model with a complex singlet scalar Cho, Gi-Chol Idegawa, Chikako High Energy Physics - Phenomenology We study the two Higgs doublet model with a complex singlet scalar whose imaginary part acts as dark matter (DM). The scattering of DM and quarks, mediated by three CP-even scalars in this model, is suppressed when masses of CP-even scalars are degenerate; that is called the ``degenerate scalar scenario''. Based on this scenario, we show that the strong first-order electroweak phase transition (EWPT) can be achieved without conflicting with constraints from the DM relic density and the direct detection experiments. We also discuss a shift of scalar trilinear coupling from the Standard Model prediction, which could be a test of this model in collider experiments. |
| title | Degenerate scalar scenario of two Higgs doublet model with a complex singlet scalar |
| topic | High Energy Physics - Phenomenology |
| url | https://arxiv.org/abs/2410.14328 |