A network of superconducting gravimeters as a detector of matter with feeble nongravitational coupling
A network of superconducting gravimeters as a detector of matter with feeble nongravitational coupling
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DOI：
10.1140/epjd/e2020-10069-8
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发表时间：
2019-12
期刊：
影响因子：
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通讯作者：
Wenxiang Hu;M. Lawson;D. Budker;N. L. Figueroa;D. F. Kimball;A. Mills;C. Voigt
中科院分区：
文献类型：
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作者：
Wenxiang Hu;M. Lawson;D. Budker;N. L. Figueroa;D. F. Kimball;A. Mills;C. Voigt
当被困在地球内部时，只与引力相互作用的隐藏物质会以特征频率振荡。对于地球中心附近的小振荡，这些频率约为300 μHz。此外，由于地球密度的不均匀性，会出现更高谐波的信号。在这项工作中，我们使用的国际地球动力学和地球潮汐服务（IGETS）的重力仪的全球网络的数据来寻找这些假设的被困对象。我们没有发现这样的物体的质量在1014公斤或更大的数量级与0.1re的振荡振幅的证据。通过更好地了解陆地噪声源和更先进的数据分析，有可能将搜索的灵敏度提高几个数量级。图形摘要
AbstractHidden matter that interacts only gravitationally would oscillate at characteristic frequencies when trapped inside of Earth. For small oscillations near the center of the Earth, these frequencies are around 300 μHz. Additionally, signatures at higher harmonics would appear because of the non-uniformity of Earth’s density. In this work, we use data from a global network of gravimeters of the International Geodynamics and Earth Tide Service (IGETS) to look for these hypothetical trapped objects. We find no evidence for such objects with masses on the order of 1014kg or greater with an oscillation amplitude of 0.1re. It may be possible to improve the sensitivity of the search by several orders of magnitude via better understanding of the terrestrial noise sources and more advanced data analysis.Graphical abstract