论文标题
来自宇宙相变的重力波信号的新灵敏度曲线
New Sensitivity Curves for Gravitational-Wave Signals from Cosmological Phase Transitions
论文作者
论文摘要
早期宇宙中强一阶相变（SFOPT）的重力波（GWS）是即将进行的GW实验的主要目标。在本文中，我为这些实验构建了新颖的峰积聚敏感性曲线（PISC），这些曲线忠实地代表了他们对宇宙SFOPT的敏感性对GW信号的敏感性，通过明确考虑信号的预期形状。正如我所说明的那样，旨在成为现象学家和模型建筑商的方便工具，可以快速，系统地将理论预测与实验敏感性进行比较。 PISC还提供了与常规幂律综合灵敏度曲线（PLISC）相比的几个优势；特别是，它们直接编码来自SFOPT的GW信号的预期信号噪声比率的信息。我为Lisa，Decigo和BBO的确切数值PISC提供了半分析拟合函数。此外，在附录中，我对大量GW实验的应变噪声功率谱进行了详细评论。可以从Zenodo Online存储库下载所有PISC，PLISC和应变噪声功率光谱的数值结果[https://doi.org/10.5281/zenodo.3689582]。在同伴论文[1909.11356]中，PISC的概念用于对标准模型的实量表 - 单词扩展中的宇宙学相变中对GW信号进行深入研究。每当有关信号的预期形状的新理论结果可用的新理论结果时，本文中介绍的PISC将需要进行更新。因此，PISC方法适合用作簿记工具，以跟踪该领域的理论进步。
Gravitational waves (GWs) from strong first-order phase transitions (SFOPTs) in the early Universe are a prime target for upcoming GW experiments. In this paper, I construct novel peak-integrated sensitivity curves (PISCs) for these experiments, which faithfully represent their projected sensitivities to the GW signal from a cosmological SFOPT by explicitly taking into account the expected shape of the signal. Designed to be a handy tool for phenomenologists and model builders, PISCs allow for a quick and systematic comparison of theoretical predictions with experimental sensitivities, as I illustrate by a large range of examples. PISCs also offer several advantages over the conventional power-law-integrated sensitivity curves (PLISCs); in particular, they directly encode information on the expected signal-to-noise ratio for the GW signal from a SFOPT. I provide semianalytical fit functions for the exact numerical PISCs of LISA, DECIGO, and BBO. In an appendix, I moreover present a detailed review of the strain noise power spectra of a large number of GW experiments. The numerical results for all PISCs, PLISCs, and strain noise power spectra presented in this paper can be downloaded from the Zenodo online repository [https://doi.org/10.5281/zenodo.3689582]. In a companion paper [1909.11356], the concept of PISCs is used to perform an in-depth study of the GW signal from the cosmological phase transition in the real-scalar-singlet extension of the standard model. The PISCs presented in this paper will need to be updated whenever new theoretical results on the expected shape of the signal become available. The PISC approach is therefore suited to be used as a bookkeeping tool to keep track of the theoretical progress in the field.
