论文标题
限制轻型暗物质，超高能量宇宙射线
Constraining light dark matter upscattered by ultrahigh-energy cosmic rays
论文作者
论文摘要
通过高能宇宙射线（CRS）向散射的光晕暗物质（DM）颗粒可以充满活力，并可以通过常规的直接检测实验来检测。对于常数DM-Nucleon散射交叉部分，从基于空间的直接CR测量得出的当前约束可以达到$ \ MATHCAL {O}（10^{ - 31}）\ text {cm}^{2} $。我们表明，如果CR能谱遵循$ \ sim e^{ - 3} $类型的功率定律，则散射横截面上的派生约束将对DM粒子质量不敏感。这表明，通过基于地面探测器的超高能量CRS（UHECRS）可用于对超轻DM颗粒的约束放置，因为$ e^{ - 3} $是UHECR能量频谱的非常好的近似值，以供uhecr $ \ sim10^{20} {20} {20} \ evev} $。使用最近的UHECR通量数据，我们表明，原则上可以将远低于EV量表的超轻DM颗粒扩展到超轻的DM颗粒。
Light halo dark matter (DM) particles upscattered by high-energy cosmic rays (CRs) can be energetic, and become detectable by conventional direct detection experiments. The current constraints derived from space-based direct CR measurements can reach $\mathcal{O}(10^{-31})\text{ cm}^{2}$ for a constant DM-nucleon scattering cross section. We show that if the CR energy spectrum follows a power law of type $\sim E^{-3}$, the derived constraints on the scattering cross section will be highly insensitive to DM particle mass. This suggests that ultrahigh-energy CRs (UHECRs) indirectly measured by ground-based detectors can be used to place constraints on ultralight DM particles, as $E^{-3}$ is a very good approximation of the UHECR energy spectrum up to energy $\sim10^{20}\text{ eV}$. Using the recent UHECR flux data, we show that the current constraints derived from space-based CR measurements can in principle be extended to ultralight DM particles far below eV scale.
