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arXiv 2301.08736gr-qcastro-ph.IM
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首次使用天基引力波天线搜索超轻暗物质:LISA探路者

First search for ultralight dark matter with a space-based gravitational-wave antenna: LISA Pathfinder

Andrew L. Miller, Luis Mendes

摘要:

我们在这里提出的结果,从有史以来第一次搜索暗光子暗物质,可以耦合到重子在LISA探路者,技术演示的空间引力波天线。在分析了LISA Pathfinder在$[2\times 10^{-5},5]$ Hz频率范围内(对应于$[8\times 10^{-20},2\times 10^{-14}]$ eV/ $c^2$的暗光子质量)采集的大约三个月的数据后,我们没有发现暗物质信号的证据,并对暗光子/重子耦合的强度设定了上限。为了进行这种搜索,我们利用了在地基干涉仪中搜索准单色引力波信号的方法,并且对数据中的非高斯性和间隙具有鲁棒性。因此,我们的工作代表了LISA中搜索方法的概念验证测试,以找到持久的准单色信号,并显示了我们处理非高斯伪影和间隙的能力,同时与最佳匹配滤波器相比保持良好的灵敏度。结果还表明,这些方法可以在LISA中成为强大的工具,不仅可以找到暗物质,而且还可以寻找其他持久的信号,例如中等质量黑洞吸入和银河系白矮星双星。

英文摘要:

We present here results from the first-ever search for dark photon dark matter that could have coupled to baryons in LISA Pathfinder, the technology demonstrator for a space-based gravitational-wave antenna. After analyzing approximately three months of data taken by LISA Pathfinder in the frequency range $[2\times 10^{-5},5]$ Hz, corresponding to dark photon masses of $[8\times 10^{-20},2\times 10^{-14}]$ eV/$c^2$, we find no evidence of a dark-matter signal, and set upper limits on the strength of the dark photon/baryon coupling. To perform this search, we leveraged methods that search for quasi-monochromatic gravitational-wave signals in ground-based interferometers, and are robust against non-Gaussianities and gaps in the data. Our work therefore represents a proof-of-concept test of search methods in LISA to find persistent, quasi-monochromatic signals, and shows our ability to handle non-Guassian artifacts and gaps while maintaining good sensitivity compared to the optimal matched filter. The results also indicate that these methods can be powerful tools in LISA to not only find dark matter, but also look for other persistent signals from e.g. intermediate-mass black hole inspirals and galactic white dwarf binaries.

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