标题： 轻子宇宙弦产生的随机引力波背景 显示英文标题

标题： Stochastic Gravitational Wave Background from Light Cosmic Strings

摘要： 计算了宇宙弦产生的随机引力波背景的能谱，并将其与当前和未来的实验限制进行了比较。对于无量纲的弦张力 \(G \mu/c^2\) 在 \(10^\{\text\{{-7}\}\}\) 到 \(10^\{\text\{{-18}\}\}\) 范围内，以及初始环状结构大小相对于哈勃半径的比例 \(\alpha\) 从 0.1 到 \(10^\{\text\{{-6}\}\}\) 的情况，能谱通过数值方法计算得出。将宇宙弦背景的能谱与当前毫秒脉冲星的限制和 LISA 的灵敏度曲线进行了对比。对于具有大而稳定环状结构（\(\alpha=0.1\)）的模型，当前脉冲星计时的限制排除了 \(G \mu/c^2 > 10^\{\text\{{-9}\}\}\) 的可能性，并且覆盖了基于膜膨胀当前模型的范围。LISA 可能检测到 \(G \mu/c^2 = 10^\{\text\{{-16}\}\}\) 对应的背景，这相当于大约 \(10^\{\text\{{11}\}\}\) GeV 场论弦形成的背景。 显示英文摘要

摘要： Spectra of the stochastic gravitational wave backgrounds from cosmic strings are calculated and compared with present and future experimental limits. Background spectra are calculated numerically for dimensionless string tensions G mu/c^2 between 10^{-7} and 10^{-18}, and initial loop sizes as a fraction of the Hubble radius, alpha, from 0.1 to 10^{-6}. The spectra of the cosmic string backgrounds are compared with current millisecond pulsar limits and LISA sensitivity curves. For models with large stable loops (alpha=0.1), current pulsar-timing limits exclude G mu/c^2>10^{-9} and within the range of current models based on brane inflation. LISA may detect a background from strings as light as G mu/c^2 10^{-16}, corresponding to field-theory strings formed at roughly 10^{11} GeV.