论文标题
半义$ z_3 $ Xenon1t多余的暗物质
Semi-annihilating $Z_3$ Dark Matter for XENON1T Excess
论文作者
论文摘要
最近报道的Xenon1T实验结果表明，在电子后坐力事件中，过量的意义为$3.5σ$。被解释为新物理学，需要新来源来解释电子散射。我们表明，来自$ \ mathcal {o} \ left（10 \右）$ mev的深色费米昂$ψ$，来自$ z_3 $ dark Matter $ x $的$ x $的$ \ weft（10 \ right）$ meV，随后衰减了深色仪表boson $v_μ$，可能负责多余。相关的半义务过程为$ x+x \ rightarrow \ edline {x}+v_μ（\rightArrowψ+\edlineψ）$，其中最终$ψ$具有盒形能量谱。快速移动的$ψ$可以通过额外的仪表玻色子与光子运动混合在一起。该模型中信号的形状可以与观察到的过量相一致。与质子的额外相互作用使该模型在未来的核心后退搜索中也可以测试。由于引入了看不见的粒子的轻度，因此这种情况需要非标准的宇宙学来容纳其他辐射分量。
The recently reported result from XENON1T experiment indicates that there is an excess with $3.5σ$ significance in the electronic recoil events. Interpreted as new physics, new sources are needed to account for the electronic scattering. We show that a dark fermion $ψ$ with mass about $ \mathcal{O}\left(10\right)$ MeV from semi-annihilation of $Z_3$ dark matter $X$ and subsequent decay of a dark gauge boson $V_μ$ may be responsible for the excess. The relevant semi-annihilation process is $X+X\rightarrow \overline{X}+V_μ(\rightarrow ψ+ \overlineψ)$, in which the final $ψ$ has a box-shape energy spectrum. The fast-moving $ψ$ can scatter with electron through an additional gauge boson that mixes with photon kinetically. The shape of the signals in this model can be consistent with the observed excess. The additional interaction with proton makes this model testable in future searches for nucleus recoil as well. Because of the lightness of invisible particle introduced, this scenario requires non-standard cosmology to accommodate the additional radiation component.
