In this work we revisit the existence of a strong first order electroweak phase transition (SFOEWPT) and recent mW 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 mW 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 mW 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 ΔmA/C∈(−400,400)GeV,\tanb∈(1,50), and ΔmA/C∈(−200,300)GeV,\tanb∈(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.
@article{arxiv.2204.05085,
title = {Electroweak Phase Transition in 2HDM under Higgs, Z-pole, and W precision measurements},
author = {Huayang Song and Wei Su and Mengchao Zhang},
journal= {arXiv preprint arXiv:2204.05085},
year = {2022}
}