论文标题
最小的3环中微子质量模型和充电的Lepton风味
Minimal 3-loop neutrino mass models and charged lepton flavor violation
论文作者
论文摘要
我们研究了三种最受欢迎的三环中微子质量模型的充电Lepton风味。我们将这些模型称为“最小”，因为它们的粒子含量对应于可以构建真正的3循环模型的最小集。在所有三种最小模型中，中微子质量基质与标准模型Lepton块的某些力量成正比，从而在预期环抑制之前提供了其他抑制因子。为了正确解释中微子肿块，因此在这些模型中需要大的Yukawa耦合。我们计算出带电的Lepton风味，违反可观察到的物品，发现这三个最小模型仅在其参数空间的非常狭窄的区域中才能生存。
We study charged lepton flavor violation for the three most popular 3-loop Majorana neutrino mass models. We call these models "minimal" since their particle content correspond to the minimal sets for which genuine 3-loop models can be constructed. In all the three minimal models the neutrino mass matrix is proportional to some powers of Standard Model lepton masses, providing additional suppression factors on top of the expected loop suppression. To correctly explain neutrino masses, therefore large Yukawa couplings are needed in these models. We calculate charged lepton flavor violating observables and find that the three minimal models survive the current constraints only in very narrow regions of their parameter spaces.
