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Majorana Neutrinos, CP Violation, Neutrinoless Double Beta and Tritium Beta Decays

机译:Majorana中微子,CP违反,无中微双Beta和Tri Beta衰变

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If the present or upcoming searches for neutrinoless double beta ((ββ)_(0ν)) decay give a positive result, the Majorana nature of massive neutrinos will be established. From the determination of the value of the (ββ)_(0ν)-decay effective Majorana mass parameter (||), it would be possible to obtain information on the type of neutrino mass spectrum. Assuming 3-v mixing and massive Majorana neutrinos, we discuss the information that a measurement of, or an upper bound on, || can provide on the value of the lightest neutrino mass m_1. With additional data on the neutrino masses obtained in ~3H β-decay experiments, it might be possible to establish whether the CP symmetry is violated in the lepton sector. This would require very high precision measurements. If CP invariance holds, the allowed patterns of the relative CP parities of the massive Majorana neutrinos would be determined.
机译:如果当前或即将进行的对无中微子双β((ββ)_(0ν))衰变的搜索给出肯定的结果,则将建立大规模中微子的Majorana性质。通过确定(ββ)_(0ν)-衰变有效马约拉纳质量参数(| |)的值,可以获取有关中微子质谱类型的信息。假设3-v混合和大量的Majorana中微子,我们讨论| |的度量或上限的信息。可以提供最轻的中微子质量m_1的值。利用在〜3Hβ衰变实验中获得的中微子质量的附加数据,可能有可能确定轻子区域是否违反了CP对称性。这将需要非常高精度的测量。如果保持CP不变性,则将确定大量Majorana中微子的相对CP奇偶校验的允许模式。

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