Using an analytic treatment, we discuss the parameter regions of large active-sterile neutrino mixing angles where sterile neutrinos produced in non-resonant flavour oscillations can approach thermalization in several cosmologies. We show that thermalization affects only large active-sterile neutrino mixing already rejected by different limits. Hence, the allowed sterile neutrino parameter regions are unaffected.

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附录：非共振产生的无菌中微子的宇宙学依赖性

使用分析处理，我们讨论了大型活性无菌中微子混合角的参数区域，其中在非共振风味振荡中产生的无菌中微子可以在几种宇宙学中接近热化。我们表明热化仅影响已经被不同限制拒绝的大型活性无菌中微子混合。因此，允许的无菌中微子参数区域不受影响。