Dark matter, electroweak phase transition, and gravitational waves in the type II two-Higgs-doublet model with a singlet scalar field
Dark matter, electroweak phase transition, and gravitational waves in the type II two-Higgs-doublet model with a singlet scalar field
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DOI：
10.1103/physrevd.103.035012
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发表时间：
2020-10
期刊：
影响因子：
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通讯作者：
Xiao-Fang Han;Lei Wang;Yang Zhang
中科院分区：
文献类型：
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作者：
Xiao-Fang Han;Lei Wang;Yang Zhang
在具有单重标量暗物质S$的II型双Higgs模型的框架下，在LHC Higgs数据的约束下，我们研究了暗物质的可观测量、电弱相变以及由这种强一阶相变产生的引力波信号.我们将重CP偶Higgs $H$作为暗物质和SM扇区之间的唯一入口，发现LHC Higgs数据和暗物质观测值需要大于130 GeV和360 GeV，对于125 GeV的Higgs具有类SM耦合的情况，$m_A=600$ GeV。接下来，我们开辟了一些参数空间，可以实现一个强的一阶电弱相变，并找到基准点的引力波谱的振幅达到未来的引力波探测器的灵敏度。
In the framework of type-II two-Higgs-doublet model with a singlet scalar dark matter $S$, we study the dark matter observables, the electroweak phase transition, and the gravitational wave signals by such strongly first order phase transition after imposing the constraints of the LHC Higgs data. We take the heavy CP-even Higgs $H$ as the only portal between the dark matter and SM sectors, and find the LHC Higgs data and dark matter observables require $m_S$ and $m_H$ to be larger than 130 GeV and 360 GeV for $m_A=600$ GeV in the case of the 125 GeV Higgs with the SM-like coupling. Next, we carve out some parameter space where a strongly first order electroweak phase transition can be achieved, and find benchmark points for which the amplitudes of gravitational wave spectra reach the sensitivities of the future gravitational wave detectors.