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arXiv · 2204.05085

Electroweak Phase Transition in 2HDM under Higgs, Z-pole, and W precision measurements

Huayang Song·Wei Su·Mengchao Zhang
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Abstract

In this work we revisit the existence of a strong first order electroweak phase transition (SFOEWPT) and recent $m_W$ precision measurement in the Type-I and Type-II 2HDMs. The O(100) GeV new scalars in 2HDMs are favored by SFOEWPT, which is necessary for electroweak baryogenesis, and observed $m_W$ shift as well. % We find that under current constraints, both Type-I and Type-II 2HDM can explain the SFOEWPT, Z-pole, Higgs precision measurements and $m_W$ precision measurement of CDF-II at same time, and all these precision measurements are sensitive to heavy Higgs mass splitting in 2HDM. The allowed regions are $\Delta m_{A/C} \in (-400, 400) GeV, \tanb\in(1,50)$, and $\Delta m_{A/C} \in (-200, 300) GeV, \tanb\in(1,12)$ for Type-I and Type-II 2HDM respectively. Furthermore future lepton collider measurements on Higgs and $Z$ boson properties can explore this scenario in more detail or even rule out it.

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Huayang Song, Wei Su, Mengchao Zhang. 2022-04-11. Electroweak Phase Transition in 2HDM under Higgs, Z-pole, and W precision measurements. https://doi.org/10.1007/jhep10(2022)048

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