Gravitational waves in models with multicritical-point principle
Gravitational waves in models with multicritical-point principle
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DOI：
10.1140/epjc/s10052-022-10440-8
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发表时间：
2022-02
期刊：
影响因子：
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通讯作者：
Yuta Hamada;H. Kawai;Kiyoharu Kawana;Kin-ya Oda;K. Yagyu
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文献类型：
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作者：
Yuta Hamada;H. Kawai;Kiyoharu Kawana;Kin-ya Oda;K. Yagyu
多临界点原理（MPP）为普朗克尺度和电弱尺度之间的大层次提供了一个自然的解释。我们考虑这样一种情形，其中MPP被应用于由两个真实的单重标量场和S扩展的标准模型，并且通过真空期望值发生维度嬗变。在本文中，我们主要研究具有非对称性的临界点，而所有其它的场都是左不变的。然后S成为自然暗物质（DM）的候选者。此外，我们集中在临界点，不具有进一步的对称性，所以没有宇宙学畴壁问题。在这样的临界点，我们专注于最大的临界点称为CP-1234，固定所有superrenormalizable参数。我们发现，仍然有一个参数区域，满足DM遗迹丰度，DM直接检测界和当前LHC的限制。在这个区域，我们发现在TeV尺度的温度附近的早期宇宙的一级相变。由此产生的引力波的峰值振幅预计为Hz，可以用未来的空间仪器如DECIGO和BBO进行测试。
The multicritical-point principle (MPP) provides a natural explanation of the large hierarchy between the Planck and electroweak scales. We consider a scenario in which MPP is applied to the Standard Model extended by two real singlet scalar fieldsandS, and a dimensional transmutation occurs by the vacuum expectation value of. In this paper, we focus on the critical points that possess asymmetryand all the other fields are left invariant. ThenSbecomes a natural dark matter (DM) candidate. Further, we concentrate on the critical points wheredoes not possess furthersymmetry so that there is no cosmological domain-wall problem. Among such critical points, we focus on maximally critical one called CP-1234 that fix all the superrenormalizable parameters. We show that there remains a parameter region that satisfies the DM relic abundance, DM direct-detection bound and the current LHC constraints. In this region, we find a first-order phase transition in the early universe around the TeV-scale temperature. The resultant gravitational waves are predicted with a peak amplitude ofat a frequency ofHz, which can be tested with future space-based instruments such as DECIGO and BBO.