引力聚焦对暗物质流的影响作为一种新的探测概念
Gravitational focusing effects on streaming dark matter as a new detection concept
AI总结：
本研究提出将太阳与地球对暗物质流的引力聚焦效应作为新探测思路，发现该效应会产生每日重复、持续约10秒的瞬态通量增强信号，为暗物质探测提供了新方向。
摘要：
冷暗物质（DM）的宇宙学模拟表明，银河系中可能存在大量暗物质流。本研究纳入了太阳和地球在暗物质流组分到达地面探测器之前对其产生的引力聚焦（GF）效应。对于暗物质流而言，引力聚焦会导致时空通量增强，幅度比标称暗物质密度高出数个数量级。值得注意的是，由于地球自转，推导得到的通量增强表现为持续约10秒的瞬态信号，每天重复出现，可持续数天或数周。这项工作为暗物质信号的探测与识别提供了新的机遇，且本模拟可应用于任何进入太阳系的不可见物质。
英文摘要：
Cosmological simulations for cold dark matter (DM) indicate that a large number of streams might exist in our Galaxy. The present work incorporates gravitational focusing (GF) effects on streaming DM constituents by the Sun and the Earth preceding their encounter with Earth bound detectors. For streaming DM, the GF gives rise to spatiotemporal flux enhancements of orders of magnitude above the nominal DM density. Remarkably, due to Earth's rotation the derived flux enhancements appear as transient signals lasting about 10 seconds repeating daily for days or weeks. This work presents a novel opportunity for DM signal detection and identification, and the present simulation can be applied to any kind of invisible matter entering the solar system.
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