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arXiv 1707.09759hep-ph
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新对称性破缺的引力波印记

Gravitational Wave Imprint of New Symmetry Breaking

Wei Chao, Wen-Feng Cui, Huai-Ke Guo, Jing Shu

摘要:

人们相信,除了粒子物理学的标准模型所描述的对称性之外,还有一些额外的基本规范对称性。这些新的规范对称性的尺度通常太高,粒子对撞机无法达到。考虑到与新规范对称性自发破缺到电弱对称性有关的相变(PT)可能是强一阶的,本文提出将由这种相变产生的随机引力波(GW)作为探测这些新的基本规范对称性的一种间接方法。作为一个例子,我们探索的可能性检测的随机GW产生的PT的$\mathbf{ B-L}$在天基干涉仪探测器。我们的研究表明,只有当$\mathbf{B-L}$的自发破缺由至少两个电弱单重标量触发时,才能用LISA、BBO、Taiji和DECIGO实验得到GW能谱.

英文摘要:

It is believed that there are extra fundamental gauge symmetries beyond these described by the Standard Model of particle physics. The scale of these new gauge symmetries are usually too high to be reachable by particle colliders. Considering that the phase transition (PT) relating to the spontaneous breaking of new gauge symmetries to the electroweak symmetry might be strongly first order, we propose in this paper taking the stochastic gravitational waves (GW) arising from this phase transition as an indirect way of detecting these new fundamental gauge symmetries. As an illustration, we explore the possibility of detecting the stochastic GW generated from the PT of $\mathbf{ B-L}$ in the space-based interferometer detectors. Out study shows that the GW energy spectrum is reachable by the LISA, BBO, Taiji and DECIGO experiments only for the case where the spontaneous breaking of $\mathbf{B-L}$ is triggered by at least two electroweak singlet scalars.

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