We show that electron recoils induced by non-relativistic Dark Matter interactions can fit well the recently reported Xenon1T excess, if they are mediated by a light pseudo-scalar in the MeV range. This is due to the favorable momentum-dependence of the resulting scattering rate, which partially compensates the unfavorable kinematics that tends to strongly suppress keV electron recoils. We study the phenomenology of the mediator and identify the allowed parameter space of the Xenon1T excess which is compatible with all experimental limits. We also find that the anomalous magnetic moments of muons and electrons can be simultaneously explained in this scenario, at the price of a fine-tuning in the couplings of the order of a few percent.

我们表明，由非相对论的暗物质相互作用引起的电子反冲力，如果它们是由MeV范围内的轻准标量介导的，则可以很好地适应最近报道的Xenon1T过量。这归因于所产生的散射速率的良好的动量依赖性，这部分补偿了趋向于强烈抑制keV电子反冲的不利运动学特性。我们研究了介体的现象学，并确定了氙气1 T过量的允许参数空间，该参数空间与所有实验极限均兼容。我们还发现，在这种情况下，可以同时解释μ子和电子的异常磁矩，而代价是微调了几个数量级的耦合。