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arXiv 1105.5879hep-ph
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三双峰中微子混合与$T_{13}$味对称性

Tri-Bimaximal Neutrino Mixing and the $T_{13}$ Flavor Symmetry

Gui-Jun Ding

摘要:

我们提出了一个三双峰中微子混合的超对称$T_{13}$模型,其完全味群为$T_{13}\times Z_{4}\times Z_2$。在首阶,带电轻子扇区的剩余对称性是$Z_3$,而$T_{13}$对称性在中微子扇区完全破缺。带电轻子的质量等级是由味对称性的自发破缺决定的,I型跷跷板机制和Weinberg算符都有助于产生轻中微子质量。三双峰混合在主导阶是精确的,而次主导贡献则对三个轻子混合角引入了阶数$λ^2_c$的修正。详细地研究了真空排列和次引导修正,在带电轻子和中微子扇区中的真空期望值之间可以容纳一个中等的$λ_c$级.

英文摘要:

We present a supersymmetric $T_{13}$ model for the tri-bimaximal neutrino mixing, and the complete flavor group is $T_{13}\times Z_{4}\times Z_2$. At leading order, the residual symmetry of the charged lepton sector is $Z_3$, and the $T_{13}$ symmetry is broken completely in the neutrino sector. The charged lepton mass hierarchies are determined by the spontaneous breaking of the flavor symmetry, both the type I see-saw mechanism and the Weinberg operator contribute to generating the light neutrino masses. Tri-bimaximal mixing is exact at leading order while subleading contributions introduce corrections of order $λ^2_c$ to the three lepton mixing angles. The vacuum alignment and subleading corrections are studied in detail, a moderate hierarchy of order $λ_c$ between the vacuum expectation values of the flavon fields in the charged lepton and neutrino sectors can be accommodated.

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