论文标题
复杂单线模型中塌陷域壁上的重力波
The gravitational waves from the collapsing domain walls in the complex singlet model
论文作者
论文摘要
我们研究了CP结构域壁以及由CP对称性在复杂的单线扩展到标准模型中自发破坏所引起的重力波。我们在模型参数空间上施加了单位性，稳定性和真空解决方案的全局最小值的约束。 CP域壁概况和紧张局势是通过数值求解相关场方程获得的。然后将明确的CP违规条款引入潜力，作为使域壁不稳定和倒塌的有偏见的术语，将BBN绑定在能量偏置的幅度上。为了获得足够强的引力波信号，域壁张力$σ$必须至少为$σ/{\ rm tev}^3 \ sim \ sim \ mathcal {o}（10^3）$。我们发现，当典型的质量尺度至少为$ \ sim \ Mathcal {o}（10）$ TEV时，可以在将来的SKA和/或Decigo程序中探测引力波谱，并且显式违反CP违反项的小至$ \ \ \ \ \ \ Mathcal {o}（O}（O}（O}（10^{ - 29} { - 29}} { - 29}} - \ $ \ $ \ n - 因此，来自塌陷域壁的重力波为高能尺度上极小违反CP的探针提供了互补性。
We study the CP domain walls and the consequent gravitational waves induced by the spontaneous breaking of the CP symmetry in the complex singlet extension to the Standard Model. We impose the constraints from the unitarity, stability and the global minimal of the vacuum solutions on the model parameter space. The CP domain wall profiles and tensions are obtained by numerically solving the relevant field equations. The explicit CP violation terms are then introduced to the potential as biased terms to make the domain walls unstable and collapse, The BBN bound on the magnitude of the energy bias is taken into account. To achieve sufficiently strong gravitational wave signals, the domain wall tension $σ$ is required to be at least $σ/{\rm TeV}^3 \sim \mathcal{O}(10^3)$. We find that the gravitational wave spectrum can be probed in the future SKA and/or DECIGO programs, when the typical mass scale is at least $\sim \mathcal{O}(10)$ TeV and the explicit CP violation terms are as small as $\mathcal{O}(10^{-29}) - \mathcal{O}(10^{-27}) $. The gravitational waves from collapsing domain walls thus provide a complementarity to the probe of extremely small CP violation at high-energy scale.
