Production of keV sterile neutrinos in supernovae: New constraints and gamma-ray observables
Production of keV sterile neutrinos in supernovae: New constraints and gamma-ray observables
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DOI：
10.1103/physrevd.99.043012
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发表时间：
2016-05
影响因子：
5
通讯作者：
C. Arguelles;V. Brdar;J. Kopp
中科院分区：
文献类型：
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作者：
C. Arguelles;V. Brdar;J. Kopp
我们研究了超新星中无菌中微子的产生，特别关注keV-MeV质量范围，如果无菌中微子要解释宇宙中的暗物质，这是最有趣的范围。我们认为，在这个质量范围内，生产无菌中微子可以强烈增强米赫耶夫-斯米尔诺夫-沃尔芬斯坦（MSW）共振，使大量的流量预计将出现从超新星，即使真空之间的混合角活跃和无菌中微子是微小的。利用能量学的论证，这就产生了对无菌中微子参数空间的限制，其混合角达到了20 - 14的数量级，并且比X射线观测的结果强了几个数量级。我们还计算了从超新星中产生的无菌中微子衰变中预期的$\mathcal{O}（\text{MeV}）$光子的通量，但发现即使对于附近的超新星，它也超出了目前的观测范围。
We study the production of sterile neutrinos in supernovae, focusing in particular on the keV--MeV mass range, which is the most interesting range if sterile neutrinos are to account for the dark matter in the Universe. We argue that in this mass range, the production of sterile neutrinos can be strongly enhanced by a Mikheyev--Smirnov--Wolfenstein (MSW) resonance, so that a substantial flux is expected to emerge from a supernova, even if vacuum mixing angles between active and sterile neutrinos are tiny. Using energetics arguments, this yields limits on the sterile neutrino parameter space that reach down to mixing angles on the order of $\sin^2 2\theta \lesssim 10^{-14}$ and are up to several orders of magnitude stronger than those from X-ray observations. We also compute the flux of $\mathcal{O}(\text{MeV})$ photons expected from the decay of sterile neutrinos produced in supernovae, but find that it is beyond current observational reach even for a nearby supernova.