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arXiv 2205.03084hep-ph
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利用$CP$对称性研究费米子质量等级和轻子味破坏

Fermion mass hierarchy and lepton flavor violation using $CP$ symmetry

Joy Ganguly

摘要:

我们提出了一个模型,采用$CP\times Z_3$对称性,夸克混合和带电轻子质量解释以下一些纹理。为了实现中微子质量和混合,我们写了一个不可重整化的拉格朗日使用II型跷跷板机制,假设${\mathcal{O}}(1)$耦合预测没有$CP$违反。然后,我们计算了中微子质量的正常和倒置顺序的耦合值。我们提出了一种机制,紫外线(UV)完成,激发更高的维拉格朗日在中微子部门。我们还计算了三重态标量驱动的轻子味违反衰变的分支分数。后来,它表明,该模型也可以容纳最大的$CP$违反打破$CP$对称性自发。

英文摘要:

We present a model which employs $CP\times Z_3$ symmetries where quark mixing and charged leptons masses are explained by following some texture. To achieve neutrino mass and mixing, we write a non-renormalizable Lagrangian using type-II seesaw mechanism by assuming ${\mathcal{O}}(1)$ couplings predicting no $CP$ violation. Then, we calculate the value of the couplings for both normal and inverted ordering of neutrino masses. We propose a mechanism of ultra-violet (UV) completion that motivates the higher dimensional Lagrangian in the neutrino sector. We also calculate the branching fraction of lepton flavor violating decays driven by triplet scalar for the model. Later, it is shown that the model can also accommodate maximal $CP$ violation by breaking the $CP$ symmetry spontaneously.

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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