论文标题
大流行后无菌中微子暗物质的新生活
A new life for sterile neutrino dark matter after the pandemic
论文作者
论文摘要
我们提出了一种新颖的机制，以在早期宇宙中生成无菌中微子$ν_s$，通过在散射过程中转换普通中微子$ν_α$ $ν_Sν_α\toν_sν_s$。在振荡初始生产后，这导致$ν_s$丰度的指数增长。我们表明，这种生产制度自然发生在自我相互作用$ν_s$中，并且这打开了重要的新参数空间，其中$ν_s$构成了所有观察到的暗物质。我们的结果提供了强大的动力，以进一步推动X射线线搜索的灵敏度，并改善结构形成的约束。
We propose a novel mechanism to generate sterile neutrinos $ν_s$ in the early Universe, by converting ordinary neutrinos $ν_α$ in scattering processes $ν_sν_α\toν_sν_s$. After initial production by oscillations, this leads to an exponential growth in the $ν_s$ abundance. We show that such a production regime naturally occurs for self-interacting $ν_s$, and that this opens up significant new parameter space where $ν_s$ make up all of the observed dark matter. Our results provide strong motivation to further push the sensitivity of X-ray line searches, and to improve on constraints from structure formation.
