探索惰性中微子暗物质中的超轻标量辅助：冷谱与异常 X/γ 射线特征
Exploring Ultralight Scalar Assistance in Sterile Neutrino Dark Matter: Cold Spectrum and Unusual X/Gamma-ray Signatures
AI总结：
本文提出超轻标量辅助的惰性中微子暗物质产生模型，通过低温抑制产生更冷功率谱，并预言三次方密度依赖的 X/γ 射线及单能中微子信号。
摘要：
我们提出了一个由标量驱动的惰性中微子产生模型，其中与超轻标量场的相互作用改变了早期宇宙中惰性中微子的振荡产生过程。由于标量质量较重，该模型有效抑制了低温下惰性中微子的产生，从而形成更冷的物质功率谱，并规避来自小尺度结构观测的约束。在该模型中，主要的暗物质遗迹来自惰性中微子，只有一小部分来源于超轻标量。此外，由于轻标量与惰性中微子耦合，对于较轻的标量质量，模型预测出可探测的 X/γ 射线通量，该通量与局域惰性中微子密度的三次方成正比。这使我们的模型区别于通常与密度呈线性依赖的普通衰变暗物质。另外，该模型还预测了潜在的低能单能中微子信号，未来的中微子望远镜有望探测到它。
英文摘要：
We present a scalar-driven sterile neutrino production model where the interaction with the ultralight scalar field modifies the oscillation production of sterile neutrinos in the early universe. The model effectively suppresses the production of sterile neutrinos at low temperatures due to the heavy scalar mass, resulting in a colder matter power spectrum that avoids constraints from small-scale structure observations. In this model, the dominant dark matter relic is from sterile neutrinos, with only a small fraction originating from the ultralight scalar. Furthermore, the model predicts a detectable X/gamma-ray flux proportional to the cubic density of local sterile neutrinos for a light scalar mass due to the light scalar coupling to sterile neutrinos. This distinguishes our model from normal decaying dark matter, which has a linear dependence on the density. In addition, the model predicts a potential low-energy monochromatic neutrino signal that can be detectable by future neutrino telescopes.
机构、总结、中文摘要均由AI分析而来，可能存在错误，请以论文正文为准。
