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arXiv 0811.4766hep-ph
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仅由对称性引起的三双峰轻子混合

Tri-bimaximal lepton mixing from symmetry only

W. Grimus, L. Lavoura

摘要:

我们构建了一个模型的三双最大轻子混合,只采用家庭对称性和软破缺,既不真空对齐,也不超对称性,额外的维度,或非重整化条款中使用我们的模型。它是标准模型的扩展,利用了具有五个右手中微子单线态的跷跷板机制。标量扇区由四个希格斯二重态和一个复规范单重态组成。我们的模型的水平对称性是基于轻子族的置换群S_3和三个轻子族数--统一起来构成对称群Delta(6 \infty^2)。该模型没有预测中微子的质量。

英文摘要:

We construct a model for tri-bimaximal lepton mixing which employs only family symmetries and their soft breaking; neither vacuum alignment nor supersymmetry, extra dimensions, or non-renormalizable terms are used in our model. It is an extension of the Standard Model making use of the seesaw mechanism with five right-handed neutrino singlets. The scalar sector comprises four Higgs doublets and one complex gauge singlet. The horizontal symmetry of our model is based on the permutation group S_3 of the lepton families together with the three family lepton numbers--united this constitutes a symmetry group Delta(6\infty^2). The model makes no predictions for the neutrino masses.

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