复标量单态扩展的 Manohar-Wise 模型中的引力波
Gravitational waves in the complex-singlet-extended Manohar-Wise model
浏览论文内容
中文总结 AI 辅助
该研究在复标量单态扩展的 Manohar-Wise 模型中分析相变产生的引力波，发现一步和两步相变信号分别覆盖 LISA/天琴/BBO 与 SKA 的灵敏度，凸显毫赫兹与纳赫兹观测的互补性。
中文摘要 AI 辅助
我们研究了由复标量单态扩展的 Manohar-Wise 模型中的宇宙学相变和随机引力波信号。离散 Z3 对称性的自发破缺产生了畴壁，其后续湮灭由小的显式对称性破缺偏置驱动。在理论和实验约束下，我们研究了两种热历史：一种满足重子数保持判据的一步强一级电弱相变，以及一种两步历史，其第一步是沿单态方向的一级相变，使电弱对称性保持不破缺。我们估算了来自声波、磁流体动力学湍流和畴壁湮灭的引力波贡献。在所采用的近似范围内，所选基准点的相变信号峰值约为 10^-3 -10^-2 Hz，与 LISA、天琴和 BBO 等天基观测站的预计灵敏度区域重叠。选择真空能量偏置将畴壁峰值固定在约 2x10^-9 Hz，我们发现两步基准点的较大畴壁张力产生的信号达到 SKA 的预计灵敏度，而一步样本则低于所考虑的脉冲星计时灵敏度。这些结果说明了毫赫兹和纳赫兹引力波观测在探测该模型中相变和离散对称性破缺方面的互补性。
英文摘要
We investigate cosmological phase transitions and stochastic gravitational-wave signals in the Manohar-Wise model extended by a complex scalar singlet. Spontaneous breaking of a discrete Z3 symmetry produces domain walls, whose subsequent annihilation is driven by a small explicit symmetry-breaking bias. Subject to theoretical and experimental constraints, we study two thermal histories: a one-step strong first-order electroweak phase transition satisfying the baryon-number preservation criterion, and a two-step history whose first transition is a first-order transition along the singlet direction, leaving electroweak symmetry unbroken. We estimate the gravitational-wave contributions from sound waves, magnetohydrodynamic turbulence, and domain-wall annihilation. Within the adopted approximations, the phase-transition signals of the selected benchmarks peak at approximately 10^-3 -10^-2 Hz and overlap the projected sensitivity regions of space-based observatories such as LISA, TianQin, and BBO. Choosing the vacuum-energy bias to fix the domain-wall peak at approximately 2x10^-9 Hz, we find that the larger domain-wall tensions of the two-step benchmarks yield signals reaching the projected SKA sensitivity, whereas the one-step sample remains below the pulsar-timing sensitivities considered. These results illustrate the complementarity of millihertz and nanohertz gravitational-wave observations in probing phase transitions and discrete-symmetry breaking in this model.
发表机构
- School of Physics and Electronics, Henan University（河南大学物理与电子学院）
机构由 AI 辅助整理，请以论文原文为准。
