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arXiv 1706.09463hep-ph
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$SU(3)_c\times SU(3)_L \times U(1)_X$规范群模型中的Froggatt-Nielsen机制

Froggatt-Nielsen mechanism in a model with $SU(3)_c\times SU(3)_L \times U(1)_X$ gauge group

Katri Huitu, Niko Koivunen

摘要:

规范群$SU(3)_c\times SU(3)_L \times U(1)_X$模型(331-model)被用来解释自然界中存在三代费米子的原因。因此,它们可以提供对风味部门的部分了解。标准模型中汤川耦合的层次结构是另一个谜,至今仍没有令人信服的解释。我们建议在331模型中使用Froggatt-Nielsen机制来解释这两个基本问题。事实证明,标量扇区中不需要额外的表示来处理这个问题。传统的331模型在树的水平上预测标量味变中性流。我们表明,他们强烈抑制在我们的模型。

英文摘要:

The models with the gauge group $SU(3)_c\times SU(3)_L \times U(1)_X$ (331-models) have been advocated to explain why there are three fermion generations in Nature. As such they can provide partial understanding of the flavour sector. The hierarchy of Yukawa-couplings in the Standard Model is another puzzle which remains without compelling explanation. We propose to use Froggatt-Nielsen -mechanism in a 331-model to explain both fundamental problems. It turns out that no additional representations in the scalar sector are needed to take care of this. The traditional 331-models predict scalar flavour changing neutral currents at tree-level. We show that they are strongly suppressed in our model.

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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