论文标题
Xenon1t电子后坐超过多余的Migdal效应的前景
Prospects of Migdal Effect in the Explanation of XENON1T Electron Recoil Excess
论文作者
论文摘要
Xenon1t实验最近宣布，在$ 1-7 $ keV的电子后坐力事件中观察到过量的，在标准模型预测中，$ 3.5〜σ $信号的意义。在这封信中，我们勾勒出以低于阈值核后坐力能量来解释Migdal电离事件的过量的前景。有趣的是，这些预计将以观察到的过量的棒球能量量表显示信号事件。我们证明，观察到的信号可以通过$ \ MATHCAL {O}（1）$ GEV中子 - 湿物质与核与细胞核的耦合相关的$ \ Mathcal {O}（1）$ \ Mathcal {O}（1）。探索了一个更乐观的场景，其中Migdal电离是由MEV量表驱动的。
The XENON1T experiment has recently announced the observation of an excess in electron recoil events at energy range of $1-7$ keV with a $3.5~σ$ signal significance over the Standard Model prediction. In this letter we sketch the prospects of explaining such an excess from Migdal ionization events with below threshold nuclear recoil energies. Interestingly, these are expected to show signal events in the ballpark energy scale of the observed excess. We demonstrate that the observed signal can be reproduced through the Migdal effect by an $\mathcal{O}(1)$ GeV neutron-philic dark matter having a spin-dependent coupling with the nucleus. A more optimistic scenario is explored where the Migdal ionization is driven by MeV scale boosted dark matter.
