论文标题
来自准稳定弦的重力波
Gravitational Waves from Quasi-stable Strings
论文作者
论文摘要
我们估计从宇宙字符串网络中发出的随机引力波谱，其中后者有效地稳定了单极对创建的破裂。较高的对称性破裂，在重新进入地平线之前，产生了较高的量表。这产生了通过弦段连接的单极抗抗斜杆对，并且弦循环形成基本上停止。结果，相对于稳定的字符串的无通电案例，引力波谱的较低频率部分被抑制，该琴弦逃避了在无量纲strension $gμ$上结合的严格的PPTA。我们显示了修改的频谱，可在正在进行的和将来的实验中访问，$gμ$值在$ 10^{ - 10} -10} -10^{ - 15} $的范围内。我们展示了如何在现实的统一理论中实现此“准稳定”字符串网络。
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.
