论文标题
宇宙射线增强了sub-gev暗物质的昼夜效应
Diurnal Effect of Sub-GeV Dark Matter Boosted by Cosmic Rays
论文作者
论文摘要
我们指出了宇宙射线增强暗物质（DM）的新型昼夜效应。 DM核子相互作用不仅允许直接检测DM用核后坐力检测，而且还允许宇宙射线散布并将非层次性DM散布到更高的能量。如果DM-核中散射横截面足够大，则DM通量会在散布地球时减弱，从而导致强烈的昼夜调制。除了具有较高后坐力能量的信号外，这种昼夜调制为直接检测增强的子GEV DM的直接检测提供了另一个突出的签名。
We point out a new type of diurnal effect for the cosmic ray boosted dark matter (DM). The DM-nucleon interactions not only allow the direct detection of DM with nuclear recoils, but also allow cosmic rays to scatter with and boost the nonrelativistic DM to higher energies. If the DM-nuclei scattering cross sections are sufficiently large, the DM flux is attenuated as it propagates through the Earth, leading to a strong diurnal modulation. This diurnal modulation provides another prominent signature for the direct detection of boosted sub-GeV DM, in addition to signals with higher recoil energy.
