Dark matter and the XENON1T electron recoil excess
Dark matter and the XENON1T electron recoil excess
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DOI：
10.1103/physrevd.102.095002
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发表时间：
2020-06
影响因子：
5
通讯作者：
K. Kannike;M. Raidal;H. Veermäe;A. Strumia;D. Teresi
中科院分区：
文献类型：
--
作者：
K. Kannike;M. Raidal;H. Veermäe;A. Strumia;D. Teresi
我们表明，电子反冲过剩约2千电子伏的XENON合作声称可以通过DM或DM类粒子具有快速组件的顺序速度为$\sim 0.1$。这些粒子不可能是我们银河系的冷DM晕的一部分，因此我们推测它们可能的性质和起源，例如快速移动的DM子晕，DM的半湮灭和附近轴子星星产生的相对论性轴子。可行的新物理方案必须适应外来DM动力学和不寻常的DM属性。
We show that the electron recoil excess around 2 keV claimed by the XENON collaboration can be fitted by DM or DM-like particles having a fast component with velocity of order $\sim 0.1$. Those particles cannot be part of the cold DM halo of our Galaxy, so we speculate about their possible nature and origin, such as fast moving DM sub-haloes, semi-annihilations of DM and relativistic axions produced by a nearby axion star. Feasible new physics scenarios must accommodate exotic DM dynamics and unusual DM properties.