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arXiv 2104.07047hep-ph
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推广的3 HDM模型中的费米子质量等级和g-2反常

Fermion mass hierarchy and g-2 anomalies in an extended 3HDM Model

A. E. Cárcamo Hernández, Sergey Kovalenko, M. Maniatis, Ivan Schmidt

摘要:

我们提出了一个扩展的3-Higgs-doublet模型(3 HDM),其中标准模型(SM)的粒子内容通过包含两个惰性$SU_{2L}$标量二重态、三个惰性和两个活性电中性规范单重态标量、带电矢量费米子和Majorana中微子来扩大。这些额外的粒子被引入到生成的SM费米子质量层次从一个顺序的循环抑制机制。在我们的模型中,顶部和奇异的费米子质量出现在树的水平,而其余的费米子得到他们的质量辐射。具体来说,底夸克、粲夸克、τ夸克和μ介子的质量出现在1圈;轻上夸克、下夸克和奇异夸克以及电子的质量出现在2圈,轻活动中微子的质量出现在3圈。我们的模型成功地占SM费米子质量和混合,并容纳所观察到的暗物质遗迹密度,电子和μ子的异常磁矩,以及所产生的约束带电轻子味违反(LFV)过程。所提出的模型预测充电LFV衰减范围内即将到来的实验。

英文摘要:

We propose an extension of the three-Higgs-doublet model (3HDM), where the Standard Model (SM) particle content is enlarged by the inclusion of two inert $SU_{2L}$ scalar doublets, three inert and two active electrically neutral gauge singlet scalars, charged vector like fermions and Majorana neutrinos. These additional particles are introduced to generate the SM fermion mass hierarchy from a sequential loop suppression mechanism. In our model the top and exotic fermion masses appear at tree level, whereas the remaining fermions get their masses radiatively. Specifically, bottom, charm, tau and muon masses appear at 1-loop; the masses for the light up, down and strange quarks as well as for the electron at 2-loop and masses for the light active neutrinos at 3-loop. Our model successfully accounts for SM fermion masses and mixings and accommodates the observed Dark Matter relic density, the electron and muon anomalous magnetic moments, as well the constraints arising from charged Lepton Flavor Violating (LFV) processes. The proposed model predicts charged LFV decays within the reach of forthcoming experiments.

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