宇宙（超）弦的随机背景：爆米花和（高斯）连续区
The stochastic background from cosmic (super)strings: popcorn and (Gaussian) continuous regimes
摘要：
在下一代引力波实验的时代，宇宙（超）弦尖端的随机背景有望被探测到，如果没有被探测到，将受到显着的限制。对于参数空间的一部分，类似爆米花的背景可以像来自在频率和时间上重叠的未解析源的（高斯）连续贡献一样明显。我们研究了未解决的宇宙弦尖在地面干涉仪，如LIGO/处女座第二代（AdLV）和爱因斯坦望远镜（ET）第三代探测器，空间天线LISA和脉冲星定时阵列（PTA）的频率范围内的贡献。我们计算AdLV、ET、LISA和PTA参数空间的灵敏度（在$2 σ$水平）。我们的结论是爆米花政权是互补的连续背景。因此，它的检测可以提高随机背景检测的信心，并可能有助于确定基本的字符串参数，如字符串张力和重连概率。
英文摘要：
In the era of the next generation of gravitational wave experiments a stochastic background from cusps of cosmic (super)strings is expected to be probed and, if not detected, to be significantly constrained. A popcorn-like background can be, for part of the parameter space, as pronounced as the (Gaussian) continuous contribution from unresolved sources that overlap in frequency and time. We study both contributions from unresolved cosmic string cusps over a range of frequencies relevant to ground based interferometers, such as LIGO/Virgo second generation (AdLV) and Einstein Telescope (ET) third generation detectors, the space antenna LISA and Pulsar Timing Arrays (PTA). We compute the sensitivity (at $2 σ$ level) in the parameter space for AdLV, ET, LISA and PTA. We conclude that the popcorn regime is complementary to the continuous background. Its detection could therefore enhance confidence in a stochastic background detection and possibly help determine fundamental string parameters such as the string tension and the reconnection probability.
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