论文标题
光晕速度中的不确定性对直接检测Sub-GEV暗物质的影响
Impact of uncertainties in the halo velocity profile on direct detection of sub-GeV dark matter
论文作者
论文摘要
我们通过Illustristng来得出我们的银河系中的暗物质的速度分布和局部密度来使用最先进的高分辨率宇宙学模拟，并在我们的银河系等星系中找到了速度分布和局部密度，并发现了这两种数量的大量扩散。接下来，我们使用我们的发现来检查使用锗和硅靶中的电子散射对地下搜索的暗物质速度曲线的敏感性。我们发现，与这些不确定性不同，Sub-GEV暗物质搜索受到这些不确定性的强烈影响，与核后坐力搜索较重的暗物质，尤其是在多种电子孔模式下，对散射横截面的敏感性也较弱。因此，通过提高对较低电离阈值的敏感性不仅会提高预测的灵敏度，而且对天体物理不确定性的依赖性将大大降低。
We use the state-of-the-art high-resolution cosmological simulations by IllustrisTNG to derive the velocity distribution and local density of dark matter in galaxies like our Milky Way and find a substantial spread in both quantities. Next we use our findings to examine the sensitivity to the dark matter velocity profile of underground searches using electron scattering in germanium and silicon targets. We find that sub-GeV dark matter search is strongly affected by these uncertainties, unlike nuclear recoil searches for heavier dark matter, especially in multiple electron-hole modes, for which the sensitivity to the scattering cross-section is also weaker. Therefore, by improving the sensitivity to lower ionization thresholds not only projected sensitivities will be boosted but also the dependence on the astrophysical uncertainties will become significantly reduced.
