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arXiv 0903.4590hep-ph
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非幺正轻子混合矩阵、轻子生成和低能CP破坏

Non-Unitary Lepton Mixing Matrix, Leptogenesis and Low Energy CP Violation

Werner Rodejohann

摘要:

众所周知,对于无味的纤体发育,一般来说,低能和高能CP破坏之间没有联系。我们强调,对于非幺正轻子混合矩阵,情况可能并非如此。我们给出了一个说明性的例子,这种连接,并表明,非标准CP相位,诱导的非么正性可以负责可观察到的影响,在中微子振荡实验以及宇宙的重子不对称性的产生。衰变中的轻子味破坏,如τ-> μ γ,也可以在可观察的水平上诱导。我们还评论中微子质量限制leptogenesis,得到几乎没有修改的情况下,一个非幺正混合矩阵。

英文摘要:

It is well-known that for unflavored leptogenesis there is in general no connection between low and high energy CP violation. We stress that for a non-unitary lepton mixing matrix this may not be the case. We give an illustrative example for this connection and show that the non-standard CP phases that are induced by non-unitarity can be responsible for observable effects in neutrino oscillation experiments as well as for the generation of the baryon asymmetry of the Universe. Lepton Flavor Violation in decays such as tau -> mu gamma can also be induced at an observable level. We also comment on neutrino mass limits from leptogenesis, which get barely modified in case of a non-unitary mixing matrix.

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