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arXiv 2204.05085hep-ph
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在Higgs、Z极和W精确测量下2 HDM中的电弱相变

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

Huayang Song, Wei Su, Mengchao Zhang

摘要:

在这项工作中,我们重新审视了存在一个强的一阶电弱相变(SFOEWPT)和最近的$m_W$精确测量的类型-I和类型-II的2 HDMs。2 HDM中的O(100)GeV新标量被SFOEWPT所青睐,这是电弱重子生成所必需的,同时也观察到了$m_W$位移。我们发现,在电流约束下,I型和II型2 HDM可以同时解释CDF-II的SFOEWPT、Z极、Higgs精确测量和$m_W$精确测量,并且这些精确测量对2 HDM中重Higgs质量分裂都很敏感. I型和II型2 HDM的允许区域分别为$Δm_{A/C} \in (-400, 400) GeV, \tanb\in(1,50)$和$Δm_{A/C} \in (-200, 300) GeV, \tanb\in(1,12)$。此外,未来轻子对撞机对希格斯玻色子和$Z$玻色子性质的测量可以更详细地探索这种情况,甚至排除它。

英文摘要:

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 $Δm_{A/C} \in (-400, 400) GeV, \tanb\in(1,50)$, and $Δm_{A/C} \in (-200, 300) GeV, \tanb\in(1,12)$ 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.

机构、总结、中文摘要均由AI分析而来,可能存在错误,请以论文正文为准。

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