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arXiv 1111.6360hep-ph
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3-3-1模型的S_3味对称性

The S_3 flavor symmetry in 3-3-1 models

P. V. Dong, H. N. Long, C. H. Nam, V. V. Vien

摘要:

我们提出了两个3-3-1模型(中性费米子或右手中微子)基于S_3味对称负责费米子质量和混合。这两种模型可以根据与轻子数有关的新电荷嵌入(\mathcal{L})加以区分。中微子小质量可以通过I型和II型跷跷板机制的合作给出。最新的中微子振荡数据可以用两个不同的方向S_3 \rightarrow Z_2和S_3 \rightarrow Z_3(或等价地在S_3 \rightarrow Z_2 \rightarrow恒等式中)来拟合,其中第二个方向是由于标量三重态和另一个作为小扰动的反凸四重态。另外,由于\mathcal{L}破坏的标量势,中性费米子模型中轻子宇称或右手中微子模型中轻子数的破缺必然发生。TeV的跷跷板尺度可以在前一个模型中自然识别。由于S_3 \rightarrow Z_3破缺,费米子对(μ,τ),(c,t)和(s,b)的简并质量分别分离。

英文摘要:

We propose two 3-3-1 models (with either neutral fermions or right-handed neutrinos) based on S_3 flavor symmetry responsible for fermion masses and mixings. The models can be distinguished upon the new charge embedding (\mathcal{L}) relevant to lepton number. The neutrino small masses can be given via a cooperation of type I and type II seesaw mechanisms. The latest data on neutrino oscillation can be fitted provided that the flavor symmetry is broken via two different directions S_3 \rightarrow Z_2 and S_3 \rightarrow Z_3 (or equivalently in the sequel S_3 \rightarrow Z_2 \rightarrow Identity), in which the second direction is due to a scalar triplet and another antisextet as small perturbation. In addition, breaking of either lepton parity in the model with neutral fermions or lepton number in the model with right-handed neutrinos must be happened due to the \mathcal{L}-violating scalar potential. The TeV seesaw scale can be naturally recognized in the former model. The degenerate masses of fermion pairs (μ, τ), (c, t) and (s, b) are respectively separated due to the S_3 \rightarrow Z_3 breaking.

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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