稠密各向异性介质中的中微子-反中微子关联
Neutrino-antineutrino correlations in dense anisotropic media
摘要：
在平均场近似下，我们导出了描述介质中（反）中微子传播的最一般的演化方程。特别是，我们认为各种类型的中微子反中微子混合，狄拉克和马约拉纳领域，无论是从非平凡的对相关性或螺旋相干由于非零中微子质量。我们表明，除非介质是空间均匀和各向同性的，这些相关性是由通常的中微子和反中微子密度的来源。这在天体物理环境中可能是重要的，例如核心坍缩超新星。
英文摘要：
We derive the most general evolution equations describing in-medium (anti)neutrino propagation in the mean-field approximation. In particular, we consider various types of neutrino-antineutrino mixing, for both Dirac and Majorana fields, resulting either from nontrivial pair correlations or from helicity coherence due to the nonvanishing neutrino masses. We show that, unless the medium is spatially homogeneous and isotropic, these correlations are sourced by the usual neutrino and antineutrino densities. This may be of importance in astrophysical environments such as core-collapse supernovae.
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