Type II seesaw models with modular A4 symmetry
Type II seesaw models with modular A4 symmetry
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DOI：
10.1103/physrevd.102.035019
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发表时间：
2019-12
影响因子：
5
通讯作者：
Tatsuo C. Kobayashi;Takaaki Nomura;T. Shimomura
中科院分区：
文献类型：
--
作者：
Tatsuo C. Kobayashi;Takaaki Nomura;T. Shimomura
在超对称框架下讨论了采用模A_4 $对称的II型跷跷板模型。在我们的方法中，模型是通过分配的$A_4$表示和轻子和三重态Higgs场的模权来分类的。然后用模$\tau$和两个自由参数刻画中微子质量矩阵。通过数值分析，我们找到了能够拟合中微子振荡数据的允许参数集。对于允许的参数集，我们得到了中微子扇区中的预测，如CP破坏相和最轻的中微子质量。最后，我们还预测了双电荷标量玻色子的分支比，重点是双电荷标量玻色子主要衰变为带电轻子的情况。
We discuss type-II seesaw models adopting modular $A_4$ symmetry in supersymmetric framework. In our approach, the models are classified by the assignment of $A_4$ representations and modular weights for leptons and triplet Higgs fields. Then neutrino mass matrix is characterized by modulus $\tau$ and two free parameters. Carrying out numerical analysis, we find allowed parameter sets which can fit the neutrino oscillation data. For the allowed parameter sets, we obtain the predictions in neutrino sector such as CP violating phases and the lightest neutrino mass. Finally we also show the predictions for the branching ratios of doubly charged scalar boson focusing on the case where the doubly charged scalar boson dominantly decays into charged leptons.