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arXiv 1704.04869hep-ph
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具有三个Higgs二重态和一个单重态标量场的U(1)非普适无反常模型

A U(1) non-universal anomaly-free model with three Higgs doublets and one singlet scalar field

S. F. Mantilla, R. Martinez

摘要:

味问题、中微子物理和费米子质量等级是将标准模型扩展到TeV尺度的重要动机。提出了一个新的非普适扩展族,它包含三个Higgs二重态、一个Higgs单重态和一个标量暗物质候选者.奇异费米子被包括在内,以取消手征异常,并允许家庭非普遍的$\mathrm{U(1)}_{X}$收费。通过实施一个额外的$\mathbb{Z}_{2}$对称性的汤川耦合项是适合在这样一种方式,费米子质量层次得到没有微调。中微子部分包括马约拉纳费米子,以实现反向跷跷板机制。将SM中微子的有效质量矩阵拟合到当前的中微子振荡数据中,以检验模型与实验证据的一致性,得出了正序方案优于逆序方案,并给出了中微子Yukawa的耦合常数值.最后,$h\rightarrow τμ$轻子味违反过程的CP偶标量,左,右手带电轻子的旋转矩阵,产生一定的区域,该模型是符合CMS报告的$\mathrm{BR}(h\rightarrow τμ)$。关键词:味问题,中微子物理,扩展标量扇区,超越标准模型,费米子质量,反跷跷板机制,LFV。

英文摘要:

The flavor problem, neutrino physics and the fermion mass hierarchy are important motivations to extend the Standard Model into the TeV scale. A new family non-universal extension is presented with three Higgs doublets, one Higgs singlet and one scalar dark matter candidate. Exotic fermions are included in order to cancel chiral anomalies and to allow family non-universal $\mathrm{U(1)}_{X}$ charges. By implementing an additional $\mathbb{Z}_{2}$ symmetry the Yukawa coupling terms are suited in such a way that the fermion mass hierarchy is obtained without fine-tuning. The neutrino sector include Majorana fermions to implement inverse see-saw mechanism. The effective mass matrix for SM neutrinos is fitted to current neutrino oscillation data to check the consistency of the model with experimental evidence, obtaining that the normal-ordering scheme is preferred over the inverse ones and the values of the neutrino Yukawa coupling constants are shown. Finally, the $h\rightarrow τμ$ lepton-flavor-violation process is addressed with the rotation matrices of the CP-even scalars, left- and right-handed charged leptons, yielding definite regions where the model is consistent with CMS reports of $\mathrm{BR}(h\rightarrow τμ)$. Keywords: Flavor Problem, Neutrino Physics, Extended Scalar Sectors, Beyond Standard Model, Fermion masses, Inverse See-Saw Mechanism, LFV.

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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