论文标题
无菌中微子光环暗物质的重力散射
Gravitational scattering of the sterile neutrino halo dark matter
论文作者
论文摘要
最近的一项研究表明，暗物质的重力散射，以质量$ M \ sim 10^3-10^4M _ {\ odot} $的大量物体的形式，可以提供一种可能的解决方案，以减轻冷暗物质的小规模结构问题。散射横截面是速度依赖性的，因此这种情况可以解释为什么矮星系中暗物质的自我相互作用是显着的，而在庞大的星系和星系簇中则不重要。在这封信中，我们表明，这种深色巨大物体可以由无菌中微子制成，其中可能的静止质量范围$m_ν\ sim 7.6 $ kev $ - $ 71 mev。该质量范围通常满足当前的大多数观察限制。无菌中微子光环的整个结构可以简单地从标准物理学中预测。
A recent study shows that gravitational scattering of dark matter, in the form of massive objects with mass $m \sim 10^3-10^4M_{\odot}$, could provide a possible solution to alleviate the small-scale structure problems of cold dark matter. The scattering cross section is velocity-dependent so that this scenario can explain why self-interaction of dark matter is significant in dwarf galaxies, but not in massive galaxies and galaxy clusters. In this Letter, we show that this kind of dark massive objects could be made of sterile neutrinos with a possible rest mass range $m_ν \sim 7.6$ keV $-$ 71 MeV. This mass range generally satisfies most of the current observational constraints. The entire structure of the sterile neutrino halos can be simply predicted from standard physics.
