论文标题
Xenon1t中的等离子体暗物质和电子后坐力事件
Plasma dark matter and electronic recoil events in XENON1T
论文作者
论文摘要
暗物质可能是在银河系中以黑色血浆的形式。具体来说，我们在这里考虑一个隐藏的扇区，由浅色“深色电子”和一个更重的“深色质子”组成，每个型号都在不间断的$ u（1）'$量规对称性下收取。这些自我互动的黑暗扇形颗粒也可以通过动力学混合相互作用与普通物质相互作用，并在暗物质直接检测实验中导致信号。实际上，在黑暗电子散射松散结合的原子电子的此类模型中，KeV电子后坐力可能很自然。在这里，我们检查了最近报道的在这种等离子体暗物质模型的背景下的Xenon1t过量。我们发现，如果动力学混合在近似范围内，则可以解释观察到的过量：$ 10^{ - 12} \ Lessimε\ Lessim 10^{ - 10} $。允许的参数空间与天体物理和宇宙学的约束一致，并且与其他直接检测实验一致。
Dark matter might be in the form of a dark plasma in the Milky Way halo. Specifically, we consider here a hidden sector consisting of a light `dark electron' and a much heavier `dark proton', each charged under an unbroken $U(1)'$ gauge symmetry. These self-interacting dark sector particles can also interact with ordinary matter via the kinetic mixing interaction, and lead to a signal in dark matter direct detection experiments. Indeed, keV electron recoils can arise quite naturally in such models from dark electron scattering off loosely bound atomic electrons. Here we examine the recently reported XENON1T excess in the context of such a plasma dark matter model. We find that the observed excess can be explained if kinetic mixing is in the approximate range: $10^{-12} \lesssim ε\lesssim 10^{-10}$. The allowed parameter space is consistent with astrophysical and cosmological constraints and consistent also with other direct detection experiments.
