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arXiv 2203.11204hep-phastro-ph.COhep-th
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准稳定弦的引力波

Gravitational Waves from Quasi-stable Strings

George Lazarides, Rinku Maji, Qaisar Shafi

摘要:

我们估计的随机引力波频谱从网络中的宇宙弦,后者是有效的稳定,对破坏的双创造。磁单极子是由早期的对称性破缺以更高的尺度产生的,并在重新进入视界之前经历显著的暴胀。这就产生了由弦段连接起来的反弦对,弦环的形成基本上停止了。因此,相对于稳定弦的无暴胀情况,引力波的低频部分被抑制,这避免了无量纲弦张力$Gμ$上严格的PPTA约束。我们显示修改后的光谱,在正在进行的和未来的实验中,$Gμ$值的范围$10^{-10} - 10^{-15}$。我们将展示如何在现实的大统一理论中实现这种“准稳定”的弦网络。

英文摘要:

We estimate the stochastic gravitational wave spectrum emitted from a network of cosmic strings in which the latter are effectively stable against breaking by monopole pair creation. The monopoles are produced at a higher scale from an earlier symmetry breaking and experience significant inflation before reentering the horizon. This gives rise to monopole-antimonopole pairs connected by string segments and the string loop formation essentially ceases. As a consequence, the lower frequency portion of the gravitational wave spectrum is suppressed relative to the no-inflation case with stable strings, which evades the stringent PPTA bound on the dimensionless string tension $Gμ$. We display the modified spectrum, accessible in the ongoing and future experiments, for $Gμ$ values in the range $10^{-10} - 10^{-15}$. We show how this `quasi-stable' string network is realized in realistic grand unified theories.

机构、总结、中文摘要均由AI分析而来,可能存在错误,请以论文正文为准。

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