Lepton-number-driven sterile neutrino production in the early universe
Lepton-number-driven sterile neutrino production in the early universe
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早期宇宙中轻子数驱动的惰性中微子产生
DOI：
10.1103/physrevd.78.023524
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发表时间：
2008
影响因子：
5
通讯作者：
G. Fuller
中科院分区：
文献类型：
--
作者：
C. Kishimoto;G. Fuller
我们研究了早期宇宙中暗物质候选者无菌中微子的中等增强中微子散射诱导的消相干产生。在一个显着的净轻子数的情况下，我们发现两个共振，有效的介质混合角是大的。我们计算轻子数耗尽驱动的这些共振的演化。我们描述了这种演变对轻子数，不育中微子静止质量，和积极的不育真空混合角的依赖。我们发现，这种共振演化可以产生一种能量峰尖锐的普通形式的残余不育中微子能谱。我们比较了我们的完整的量子动力学方程的治疗广泛使用的量子芝诺anananterior。
We examine medium-enhanced, neutrino scattering-induced decoherent production of dark matter candidate sterile neutrinos in the early universe. In cases with a significant net lepton number we find two resonances, where the effective in-medium mixing angles are large. We calculate the lepton number depletion-driven evolution of these resonances. We describe the dependence of this evolution on lepton numbers, sterile neutrino rest mass, and the active-sterile vacuum mixing angle. We find that this resonance evolution can result in relic sterile neutrino energy spectra with a generic form which is sharply peaked in energy. We compare our complete quantum kinetic equation treatment with the widely-used quantum Zeno ansatz.