论文标题
无菌中微子暗物质通过共同的共振
Sterile neutrino dark matter via coinciding resonances
论文作者
论文摘要
有人提出，在温度下，可以在早期的宇宙中重合两个共鸣。在中型中微子和keV尺度的无菌中微子之间，另一个将Lepton的不对称性转化为暗物质。利用一个框架，该框架跟踪了三个无菌中微子以及三个独立的Lepton不对称的框架，并扫描了GEV规模物种的参数空间，我们建立了实现这种情况所需的微调程度。
It has been proposed that two resonances could coincide in the early universe at temperatures $T \sim 0.2 ... 0.5$ GeV: one between two nearly degenerate GeV-scale sterile neutrinos, producing a large lepton asymmetry through freeze-out and decays; another between medium-modified active neutrinos and keV-scale sterile neutrinos, converting the lepton asymmetry into dark matter. Making use of a framework which tracks three sterile neutrinos of both helicities as well as three separate lepton asymmetries, and scanning the parameter space of the GeV-scale species, we establish the degree of fine-tuning that is needed for realizing this scenario.
