Atmospheric dark matter and XENON1T excess
Atmospheric dark matter and XENON1T excess
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DOI：
10.1103/physrevd.102.115028
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发表时间：
2020-06
影响因子：
5
通讯作者：
Liangliang Su;Wenyu Wang;Lei Wu;Jin Min Yang;B. Zhu
中科院分区：
文献类型：
--
作者：
Liangliang Su;Wenyu Wang;Lei Wu;Jin Min Yang;B. Zhu
最近，XENON1T的合作报告了一个耐人寻味的电子反冲过剩现象，这可能意味着暗物质是亮的。为了解释这种反常现象，我们提出了宇宙线(CRS)与大气非弹性碰撞产生的大气暗物质(ADM)。由于高能CRS的增强效应，我们证明了光ADM可以快速运动，并通过ADM-电子散射过程成功地拟合了观测到的电子反冲光谱。同时，我们的ADM预测了散射截面σ_e\sim{\cal O}(10^{-38}-10^-39}$)cm^{2}$，从而可以避开其他直接探测约束。寻找轻介子稀有衰变，如$\eta\to\pi+\斜切的E_T$，将为我们未来的ADM提供一个补充的探测。
Very recently, the Xenon1T collaboration has reported an intriguing electron recoil excess, which may imply for light dark matter. In order to interpret this anomaly, we propose the atmospheric dark matter (ADM) from the inelastic collision of cosmic rays (CRs) with the atmosphere. Due to the boost effect of high energy CRs, we show that the light ADM can be fast-moving and successfully fit the observed electron recoil spectrum through the ADM-electron scattering process. Meanwhile, our ADM predicts the scattering cross section $\sigma_e \sim {\cal O}(10^{-38}- 10^{-39}$) cm$^{2}$, and thus can evade other direct detection constraints. The search for light meson rare decays, such as $\eta \to \pi + \slashed E_T$, would provide a complementary probe of our ADM in the future.