论文标题
壳中介体暗物质模型和Xenon1t异常
On-shell mediator dark matter models and the Xenon1T anomaly
论文作者
论文摘要
我们提出了一个暗物质模型，以解释Xenon1t实验最近报道的电子后坐力数据中的多余事件。在我们的模型中，暗物质$χ$将其歼灭成一对壳粒子$ ϕ $，随后衰减到$ψψ$最终状态； $ψ$与电子相互作用以产生观察到的多余事件。由于质量层次结构，$ψ$的速度可能很大，并且可以具有扩展分布，这为电子后坐力能量谱提供了很好的拟合。我们估计了银河系中暗物质歼灭的$ψ$的通量，并进一步确定了相互作用的横截面，该横截面很大，但足够小，可以允许$ψ$穿透岩石到达地下实验室。
We present a dark matter model to explain the excess events in the electron recoil data recently reported by the Xenon1T experiment. In our model, dark matter $χ$ annihilates into a pair of on-shell particles $ϕ$ which subsequently decay into $ψψ$ final state; $ψ$ interacts with electron to generate the observed excess events. Due to the mass hierarchy, the velocity of $ψ$ can be rather large and can have an extended distribution, which provides a good fit to the electron recoil energy spectrum. We estimated the flux of $ψ$ from dark matter annihilations in the galaxy and further determined the interaction cross section which is sizable but small enough to allow $ψ$ to penetrate the rocks to reach the underground labs.
