论文标题
Xenon1t多余的简单黑暗部门的证据
Evidence of a simple dark sector from XENON1T excess
论文作者
论文摘要
我们建议，由于银河系中的kev暗费米子的灭绝而产生的几乎无质量的暗光子可以诱导最近在Xenon1t实验中观察到的电子后坐力事件的过量事件。最小的模型是$ u（1）_ {x} $规范对称性的扩展，在该范围内，深色光子伴侣都可以划分为黑暗和可见的物质电流。我们发现，黑暗扇区的最佳拟合参数与恒星冷却中最严格的约束兼容。我们还表明，在冻结场景中，黑暗的费米子可以解释异常，同时贡献了DM Relic密度的$ \ gtrsim 1 \％$。
We propose that the nearly massless dark photons produced from the annihilation of keV dark fermions in the Galaxy can induce the excess of electron recoil events recently observed in the XENON1T experiment. The minimal model for this is the extension of a $U(1)_{X}$ gauge symmetry, under which the dark photon couples to both dark and visible matter currents. We find that the best-fit parameters of the dark sector are compatible with the most stringent constraints from stellar cooling. We also show that in the freeze-out scenario, the dark fermions can explain the anomaly while contributing $\gtrsim 1\%$ of the DM relic density.
