论文标题
Xenon-1T多余
Xenon-1T excess as a possible signal of a sub-GeV hidden sector dark matter
论文作者
论文摘要
我们提出了一个粒子物理模型，以解释在2.5 keV的电子后坐力能量下观察到的XENON-1T数据中观察到的增强。该模型基于标准模型的$ u（1）$扩展，其中黑暗扇区由两个基本质量退化的dirac fermions组成，在子gev区域中，与深色光子相互作用的小质量分裂相互作用。深色光子是不稳定的，并且在大爆炸核合成之前腐烂，这导致了两个本质上是质量变性的迪拉克费米斯的暗物质。 XENON-1T过量是通过从Xenon中的一个结合电子到更轻的深色费米的无弹性放热散射计算的，从而产生了后坐力电子能量中观察到的过量事件。该模型可以通过来自Xenon-1T的进一步数据和将来的实验（例如SuperCDMS）进行测试。
We present a particle physics model to explain the observed enhancement in the Xenon-1T data at an electron recoil energy of 2.5 keV. The model is based on a $U(1)$ extension of the Standard Model where the dark sector consists of two essentially mass degenerate Dirac fermions in the sub-GeV region with a small mass splitting interacting with a dark photon. The dark photon is unstable and decays before the big bang nucleosynthesis, which leads to the dark matter constituted of two essentially mass degenerate Dirac fermions. The Xenon-1T excess is computed via the inelastic exothermic scattering of the heavier dark fermion from a bound electron in xenon to the lighter dark fermion producing the observed excess events in the recoil electron energy. The model can be tested with further data from Xenon-1T and in future experiments such as SuperCDMS.
