伪戈德斯通暗物质：引力波和直接探测盲点
Pseudo-Goldstone dark matter: gravitational waves and direct-detection blind spots
摘要：
伪金石暗物质是一种具有动量抑制直接探测截面的热遗迹。我们研究了最普遍的模型，伪戈德斯通暗物质所产生的复杂的单态扩展的标准模型。新的U（1）对称性的模型被明确打破了CP-样对称稳定暗物质。我们研究了直接探测约束与宇宙相变强度和可能的引力波信号的相互作用。虽然大的U（1）破缺相互作用可以产生大的直接检测截面，但是存在抑制截面的盲点。我们发现，相当大的立方耦合可以在早期宇宙中引起一级相变。我们表明，存在的参数空间区域，由此产生的引力波信号可以在未来检测到拟议的大爆炸观测器探测器。
英文摘要：
Pseudo-Goldstone dark matter is a thermal relic with momentum-suppressed direct-detection cross section. We study the most general model of pseudo-Goldstone dark matter arising from the complex-singlet extension of the Standard Model. The new U(1) symmetry of the model is explicitly broken down to a CP-like symmetry stabilising dark matter. We study the interplay of direct-detection constraints with the strength of cosmic phase transitions and possible gravitational-wave signals. While large U(1)-breaking interactions can generate a large direct-detection cross section, there are blind spots where the cross section is suppressed. We find that sizeable cubic couplings can give rise to a first-order phase transition in the early universe. We show that there exist regions of the parameter space where the resulting gravitational-wave signal can be detected in future by the proposed Big Bang Observer detector.
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