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arXiv 0908.0822hep-ph
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反跷跷板机制中的Friedberg-Lee对称性和三-双极大中微子混合

Friedberg-Lee symmetry and tri-bimaximal neutrino mixing in the inverse seesaw mechanism

Aik Hui Chan, Hwee Boon Low, Zhi-zhong Xing

摘要:

三对规范单态中微子的反跷跷板机制提供了一个自然的解释,在TeV尺度上的三个活动中微子的微小质量。我们结合这张照片与新提出的Friedberg-Lee(FL)对称性,以了解所观察到的中微子混合模式。我们表明,FL对称性只需要两对规范单重态中微子的质量,这意味着一个活跃的中微子必须是无质量的。本文提出了规范单重态中微子扇区中FL对称性破缺和μ-τ对称性精确的唯象模型,并利用反跷跷板关系得到了三双峰中微子混合斑图.我们证明了在这种TeV量级的跷跷板情形下,非么正修正可以达到百分量级,μ-τ对称性的软破缺可以导致CP破坏.

英文摘要:

The inverse seesaw mechanism with three pairs of gauge-singlet neutrinos offers a natural interpretation of the tiny masses of three active neutrinos at the TeV scale. We combine this picture with the newly-proposed Friedberg-Lee (FL) symmetry in order to understand the observed pattern of neutrino mixing. We show that the FL symmetry requires only two pairs of the gauge-singlet neutrinos to be massive, implying that one active neutrino must be massless. We propose a phenomenological ansatz with broken FL symmetry and exact μ-τsymmetry in the gauge-singlet neutrino sector and obtain the tri-bimaximal neutrino mixing pattern by means of the inverse seesaw relation. We demonstrate that non-unitary corrections to this result are possible to reach the percent level and a soft breaking of μ-τsymmetry can give rise to CP violation in such a TeV-scale seesaw scenario.

机构、总结、中文摘要均由AI分析而来,可能存在错误,请以论文正文为准。

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