arXiv 1403.25252014-03hep-ph

具有额外味对称性的$SU(5)$大统一模型中的费米子质量和混合

Fermion masses and mixings in an $SU(5)$ grand unified model with an extra flavor symmetry

Miguel D. Campos, A. E. Cárcamo Hernández, S. Kovalenko, Iván Schmidt, Erik Schumacher

备注：: 15 pages, 1 figure. Improved version. Version for publication in Physical Review D. arXiv admin note: text overlap with arXiv:1307.6499
DOI：: 10.1103/PhysRevD.90.016006

摘要：

我们提出了一个模型的基础上的$SU(5)$大统一与额外的$A_{4}\otimes Z_{2}\otimes Z_{2}^{\prime }\otimes Z_{2}^{\prime \prime}\otimes U\left( 1\right) _{f}$味对称性，占模式的SM费米子质量和混合。所观察到的带电费米子质量和夸克混合矩阵元的层次结构产生于广义Froggatt-Nielsen机制触发的标量$\mathbf{24}$表示的$SU(5)$负责下的全球$U(1)_{f}$，并获得VEV在大统一尺度。轻中微子质量是通过辐射跷跷板机制产生的，其中一个重的马约拉纳中微子和中性标量在循环中运行。模型对夸克和轻子扇区的预测与实验数据符合得很好。该模型预测了一个有效的马约拉纳中微子质量，相关的中微子双β衰变，与值$m_{ββ}=$ 4和50毫电子伏的正常和倒置的中微子光谱，分别。该模型还具有抑制CP破坏中微子振荡，低规模的重马约拉纳中微子（几TeV），由于未破缺的$Z_{2}$对称性，自然暗物质的候选人。

英文摘要：

We propose a model based on the $SU(5)$ grand unification with an extra $A_{4}\otimes Z_{2}\otimes Z_{2}^{\prime }\otimes Z_{2}^{\prime \prime}\otimes U\left( 1\right) _{f}$ flavor symmetry, which accounts for the pattern of the SM fermion masses and mixings. The observed hierarchy of charged fermion masses and quark mixing matrix elements arises from a generalized Froggatt-Nielsen mechanism triggered by a scalar $\mathbf{24}$ representation of $SU(5)$ charged under the global $U(1)_{f}$ and acquiring a VEV at the GUT scale. The light neutrino masses are generated via a radiative seesaw mechanism with a single heavy Majorana neutrino and neutral scalars running in the loops. The model predictions for both quark and lepton sectors are in good agreement with the experimental data. The model predicts an effective Majorana neutrino mass, relevant for neutrinoless double beta decay, with values $m_{ββ}=$ 4 and 50 meV for the normal and the inverted neutrino spectrum, respectively. The model also features a suppression of CP violation in neutrino oscillations, a low scale for the heavy Majorana neutrino (few TeV) and, due to the unbroken $Z_{2}$ symmetry, a natural dark matter candidate.

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。

摘要：

英文摘要：

相关论文