On the Connection of Leptogenesis with Low Energy CP Violation and LFV Charged Lepton Decays
On the Connection of Leptogenesis with Low Energy CP Violation and LFV Charged Lepton Decays
复制标题
轻子发生与低能 CP 破坏和 LFV 带电轻子衰变的联系
DOI：
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发表时间：
2020
期刊：
影响因子：
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通讯作者：
W. Rodejohann
中科院分区：
文献类型：
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作者：
S. Petcov;W. Rodejohann
仅假设重马约拉纳中微子质量和跷跷板机制的中微子狄拉克质量矩阵mD的层次结构，我们发现，为了通过轻生作用产生观测到的宇宙重子不对称性，mD的尺度应该由上夸克质量给出。考虑了μ→e+γ、τ→μ+γ和τ→e+γ的轻子风味违反衰变，并预测了它们衰变速率之间的特征关系。如果其中一个重马约拉纳中微子比另外两个重得多，则无中微子双β衰变的有效马约拉纳质量取决于控制轻生的CP违背相。成功的纤毛发生需要后者之间有相当温和的质量等级。所指出的层次关系也符合低能中微子混合现象。所研究的情景与低能中微子混合现象学是相容的。中微子振荡中的CP违背效应是可以观察到的。一般来说，后者与纤毛发生中的CP违逆之间没有直接联系。如果跷跷板模型的CP违反相满足一定的关系，则宇宙的重子不对称性和重相不变的JCP依赖于相同的CP违反相，它们的符号是相关的，而重相不变的JCP决定了中微子振荡中CP违反效应的大小。也在：保加利亚科学院核研究和核能研究所，保加利亚索非亚1784
Assuming only a hierarchical structure of the heavy Majorana neutrino masses and of the neutrino Dirac mass matrix mD of the see–saw mechanism, we find that in order to produce the observed baryon asymmetry of the Universe via leptogenesis, the scale of mD should be given by the up–quark masses. Lepton flavor violating decays μ → e+γ, τ → μ+γ and τ → e+γ are considered and a characteristic relation between their decay rates is predicted. The effective Majorana mass in neutrinoless double beta decay depends on the CP violating phase controlling the leptogenesis if one of the heavy Majorana neutrinos is much heavier than the other two. Successful leptogenesis requires a rather mild mass hierarchy between the latter. The indicated hierarchical relations are also compatible with the low-energy neutrino mixing phenomenology. The scenario under study is compatible with the low–energy neutrino mixing phenomenology. The CP violation effects in neutrino oscillations can be observable. In general, there is no direct connection between the latter and the CP violation in leptogenesis. If the CP violating phases of the see–saw model satisfy certain relations, the baryon asymmetry of the Universe and the rephasing invariant JCP which determines the magnitude of the CP violation effects in neutrino oscillations, depend on the same CP violating phase and their signs are correlated. Also at: Institute of Nuclear Research and Nuclear Energy, Bulgarian Academy of Sciences, 1784 Sofia, Bulgaria