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arXiv 2111.04342hep-ph
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两分量暗物质模型中的电弱相变和引力波

Electroweak phase transition and gravitational waves in a two-component dark matter model

Ahmad Mohamadnejad

摘要:

我们研究了标准模型(SM)的扩展与暗物质(DM)的两个候选人。其中一个是实标量场,另一个是阿贝尔规范场。除了这两个外,还有一个在暗$ U_{D}(1) $规范对称性下具有单位电荷的超SM场。该模型是经典标度不变的,由于环效应,电弱对称性破缺。虽然SM扩展了一个新的暗对称性和三个字段,由于标度不变性,参数空间严格限制相比,其他两个组件DM模型。我们研究了DM唯象和电弱相变,发现在模型的参数空间中存在一些点,这些点与DM残体密度和直接探测约束相一致,同时也能导致一阶电弱相变.在相变期间产生的引力波可以由未来的天基干涉仪探测,如激光干涉仪空间天线(LISA)和大爆炸观测器(BBO)。

英文摘要:

We investigate an extension of the Standard Model (SM) with two candidates for dark matter (DM). One of them is a real scalar field and the other is an Abelian gauge field. Except for these two, there is another beyond SM field which has unit charge under a dark $ U_{D}(1) $ gauge symmetry. The model is classically scale invariant and the electroweak symmetry breaks because of the loop effects. Although SM is extended with a new dark symmetry and three fields, because of scale invariance, the parameter space is strictly restricted compared to other two-component DM models. We study both DM phenomenology and electroweak phase transition and show that there are some points in the parameter space of the model consistent with DM relic density and direct detection constraints, while at the same time can lead to first order electroweak phase transition. The gravitational waves produced during the phase transition could be probed by future space-based interferometers such as Laser Interferometer Space Antenna (LISA) and Big Bang Observer (BBO).

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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