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arXiv 1503.06998hep-phastro-ph.COgr-qc
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次极小超对称标准模型中畴壁的引力波

Gravitational waves from domain walls in the next-to-minimal supersymmetric standard model

Kenji Kadota, Masahiro Kawasaki, Ken'ichi Saikawa

摘要:

下一个最小的超对称标准模型预测畴壁的形成,由于自发破缺的离散$Z_3$ -对称性在电弱相变,和他们崩溃之前的大爆炸核合成的时代,如果存在一个小的偏置项的潜力,明确打破了离散对称性。从这些不稳定的畴壁产生的引力波的签名估计和它们的参数依赖性进行了研究。结果表明,引力波的振幅变得普遍大的去耦限制,和他们的频率是足够低的脉冲星定时观测探测。

英文摘要:

The next-to-minimal supersymmetric standard model predicts the formation of domain walls due to the spontaneous breaking of the discrete $Z_3$-symmetry at the electroweak phase transition, and they collapse before the epoch of big bang nucleosynthesis if there exists a small bias term in the potential which explicitly breaks the discrete symmetry. Signatures of gravitational waves produced from these unstable domain walls are estimated and their parameter dependence is investigated. It is shown that the amplitude of gravitational waves becomes generically large in the decoupling limit, and that their frequency is low enough to be probed in future pulsar timing observations.

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