基于S_3味对称性的轻子质量谱和味混合模式模型（英文）

A model for lepton mass spectra and flavor mixing under S_3 flavor symmetry

为解释轻子质量谱和中微子味混合模式,从味对称性出发,构造一个简单的基于S3味对称性的type-Ⅱ跷跷板模型.在模型中,假设轻子质量矩阵具有S3味对称性,并且该对称性可经由破缺链S3→Z2→φ显示破缺.计算得到与最新实验数据符合较好的中微子振荡混合角(θ12,θ23和θ13)和最大的Dirac CP破坏相角δ≈270°.

We propose a simple model for the lepton mass spectra and flavor mixing by combining the S3 flavor symmetry with type- II seesaw mechanism. To obtain the observed mass spectra and mixing patterns of lepton sector,the explicit flavor symmetry breaking chain S3→ Z2→ φ is considered. It is shown that this ansatz can naturally allow the three neutrino mixing angles（ i. e.,θ12,θ23,and θ13） to be in good agreement with the current experiment data and the maximal Dirac CP-violating phase δ≈270° indicated by recent experiments.