标题： 从先进LIGO和先进Virgo前三次观测运行中声速共振的引力波背景搜索 显示英文标题

标题： Search for a Gravitational-Wave Background from Sound Speed Resonance from Advanced LIGO and Advanced Virgo's First Three Observing Runs

摘要： 我们使用先进LIGO和先进Virgo的前三次观测运行数据，搜索来自标量诱导引力波（SIGWs）的随机引力波背景（SGWB），该引力波具有声速共振（SSR）效应。SSR机制的特点是声速平方项的振荡，可以在暴胀期间对特定扰动模式产生非微扰的参数放大，导致原初曲率扰动增强并产生显著的SIGW信号。我们进行贝叶斯分析，以限制描述SSR效应引起的SGWB频谱的模型参数。我们的结果表明，当前数据中没有统计上显著的该信号存在的证据。因此，我们在SSR模型中振荡开始时间的置信度为$95\%$时，给出了$|\tau_0| \lesssim 5.9 \times 10^3\,\mathrm{s}$的上限。这些结果展示了当前引力波探测器通过SSR机制探测暴胀模型的能力，并为未来灵敏度更高的搜索铺平了道路。 显示英文摘要

摘要： We search for a stochastic gravitational-wave background (SGWB) originating from scalar-induced gravitational waves (SIGWs) with the sound speed resonance (SSR) effect using data from Advanced LIGO and Advanced Virgo's first three observing runs. The SSR mechanism, characterized by an oscillating sound speed squared term, can induce a nonperturbative parametric amplification of specific perturbation modes during inflation, leading to enhanced primordial curvature perturbations and a significant SIGW signal. We perform a Bayesian analysis to constrain the model parameters describing the SGWB spectrum from the SSR effect. Our results show no statistically significant evidence for the presence of such a signal in the current data. Consequently, we place an upper limit of $|\tau_0| \lesssim 5.9 \times 10^3\,\mathrm{s}$ at $95\%$ confidence level on the start time of the oscillation in the SSR model. These results demonstrate the capability of current gravitational wave detectors to probe inflation models through the SSR mechanism and paves the way for future searches with improved sensitivity.