利用天文星历直接探测超轻暗物质
Direct Detection of Ultralight Dark Matter via Astronomical Ephemeris
摘要：
提出了一种基于暗物质与核子相互作用直接探测超轻暗物质的新思想。太阳系的天体感受到了暗物质风，暗物质风就像一股阻力，阻碍着它们的运动。太阳系天体的天文星历非常精确，它具有很强的探测能力，可以探测到质量远小于O（1）eV的暗物质。通过计算暗物质与超出玻恩近似的天体之间的弹性散射截面，我们估算了阻力，并表明天文星历确实对暗物质与核子之间的相互作用施加了很强的约束，这取决于超轻暗物质在比我们太阳系天体小的尺度上分布的平滑程度。
英文摘要：
A novel idea of the direct detection to search for a ultralight dark matter based on the interaction between the dark matter and a nucleon is proposed. Solar system bodies feel the dark matter wind and it acts as a resistant force opposing their motions. The astronomical ephemeris of solar system bodies is so precise that it has a strong capability to detect a dark matter whose mass is much lighter than O(1) eV. We have estimated the resistant force based on the calculation of the elastic scattering cross section between the dark matter and the bodies beyond the Born approximation, and show that the astronomical ephemeris indeed put a very strong constraint on the interaction between the dark matter and a nucleon, depending on how smoothly the ultralight dark matter is distributed at the scale smaller than the celestial bodies in our solar system.
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