论文标题
从随机引力波的精密早期宇宙宇宙学
Precision Early Universe Cosmology from Stochastic Gravitational Waves
论文作者
论文摘要
随机重力波的因果尾巴可用于探测自由流相对论物种中的能量密度，并测量$ g_ \ star（t）$和beta函数$β（t）$作为温度的函数。如果发现响亮的随机引力波，我们证明丽莎可以将宇宙的自由流分数降低到$ 10^{ - 3} $级别，比当前约束高100倍。此外，它将对$ g_ \ star $的$ \ MATHCAL {O}（1）$偏差和QCD $β$函数在温度下的标准模型值$ \ sim 10^5 $ gev。在这种情况下，将测试许多积极的模型，例如Split Susy和其他解决电动层层次结构问题的解决方案。未来的探测器（例如Decigo）对这些影响的敏感性将比丽莎高100倍，并能够测试其他动机场景，例如wimps and Axions。使用精确的引力波测量测试如此充分动机的理论的惊人前景为实验和理论上对重力波谱的精确理解时提供了基准。
The causal tail of stochastic gravitational waves can be used to probe the energy density in free streaming relativistic species as well as measure $g_\star(T)$ and beta functions $β(T)$ as a function of temperature. In the event of the discovery of loud stochastic gravitational waves, we demonstrate that LISA can measure the free streaming fraction of the universe down to the the $10^{-3}$ level, 100 times more sensitive than current constraints. Additionally, it would be sensitive to $\mathcal{O}(1)$ deviations of $g_\star$ and the QCD $β$ function from their Standard Model value at temperatures $\sim 10^5$ GeV. In this case, many motivated models such as split SUSY and other solutions to the Electroweak Hierarchy problem would be tested. Future detectors, such as DECIGO, would be 100 times more sensitive than LISA to these effects and be capable of testing other motivated scenarios such as WIMPs and axions. The amazing prospect of using precision gravitational wave measurements to test such well motivated theories provides a benchmark to aim for when developing a precise understanding of the gravitational wave spectrum both experimentally and theoretically.
