论文标题
Xenon1t中的伪DIRAC暗物质
Pseudo-Dirac Dark Matter in XENON1T
论文作者
论文摘要
Xenon1t暗物质实验最近报告了对电子后坐力的0.65吨年暴露测量，该测量显示了$ 2 \ sim 3 $ keV后坐力超过检测器背景。在本文中，我们提出了一个伪dirac的暗物质情景，以通过非弹性暗物质电子散射来解释过量的。在伪dirac暗物质的两个组件之间进行keV量表质量分裂，稍加激发的成分可以在电子上向下划分。所需的暗物质质量约为10 GEV，具有4 keV质量分解和与电子的统一耦合，这会产生观察到的Xenon1T后坐力事件，给出适当的暗物质遗物丰度，并满足碰撞搜索范围。
The XENON1T dark matter experiment recently reported 0.65 ton-year exposure measurement on electron recoils , which shows an excess in $2\sim 3$ KeV recoils above the detector background. In this paper we present a Pseudo-Dirac dark matter scenario to explain the excess via inelastic dark matter-electron scattering. With a KeV scale mass splitting between the two components of the Pseudo-Dirac dark matter, the slightly excited component can down-scatter on electrons. The desired dark matter masses are about 10 GeV with a 4 KeV mass-splitting and unity coupling to electrons, which generate the observed XENON1T recoil events, give the appropriate dark matter relic abundance and satisfy collider search limits.
