From NANOGrav to LIGO with metastable cosmic strings
From NANOGrav to LIGO with metastable cosmic strings
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DOI：
10.1016/j.physletb.2020.135914
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发表时间：
2020-09
影响因子：
4.4
通讯作者：
W. Buchmuller;V. Domcke;K. Schmitz
中科院分区：
文献类型：
--
作者：
W. Buchmuller;V. Domcke;K. Schmitz
我们根据亚稳态宇宙弦的随机引力波背景来解释最近的 NANOGrav 结果。观测到的随机信号幅度可以转化为大统一理论中宇宙弦张力和磁单极子质量的范围。在参数空间的相当大的一部分中，这种解释预测在地基干涉仪的频段内会出现一个大的随机引力波信号，可以在不久的将来对其进行探测。我们将这些结果与来自规范dB−L对称性自发破缺的成功膨胀、轻子发生和暗物质的预测进行对比。
We interpret the recent NANOGrav results in terms of a stochastic gravitational wave background from metastable cosmic strings. The observed amplitude of a stochastic signal can be translated into a range for the cosmic string tension and the mass of magnetic monopoles arising in theories of grand unification. In a sizable part of the parameter space, this interpretation predicts a large stochastic gravitational wave signal in the frequency band of ground-based interferometers, which can be probed in the very near future. We confront these results with predictions from successful inflation, leptogenesis and dark matter from the spontaneous breaking of a gaugedB−Lsymmetry.