论文标题
从银河中心的方向从宇宙射线上划出的明显直接检测光线暗物质
Directional direct detection of light dark matter up-scattered by cosmic rays from direction of the Galactic center
论文作者
论文摘要
用标准直接搜索探测器很难检测到具有MEV量表质量的暗物质。但是，可以通过考虑宇宙射线的动力散射来搜索它们。由于银河系中央区域的暗物质密度较高，因此脱落的暗物质将从银河中心的方向到达地球。一旦检测到暗物质，我们就可以期望通过定向直接检测实验识别此功能。在这项研究中，我们模拟了上散射的暗物质的核后坐力，并定量地表明，大量这种暗物质正在从银河中心的方向到达。此外，我们已经表明，可以用超过5 $σ$的置信度来验证，对于假定的目标原子，并将未来升级到方向检测器，可以验证超过5 $σ$的置信度。
Dark matter with MeV scale mass is difficult to detect with standard direct search detectors. However, they can be searched for by considering the up-scattering of kinetic energies by cosmic rays. Because the dark matter density is higher in the central region of the Galaxy, the up-scattered dark matter will arrive at Earth from the direction of the Galactic center. Once the dark matter is detected, we can expect to recognize this feature by directional direct detection experiments. In this study, we simulate the nuclear recoils of the up-scattered dark matter and quantitatively reveal that a large amount of this type of dark matter is arriving from the direction of the Galactic center. Also, we have shown that the characteristic signatures of the up-scattered dark matter can be verified with more than 5$σ$ confidence levels for the assumed target atoms and future upgrades to directional detectors.
