arXiv 1909.028912019-09-18hep-ph

MSSM的$U(1)_X$扩展，具有三个系列

A $U(1)_X$ extension to the MSSM with three families

J. S. Alvarado, Carlos E. Diaz, R. Martinez

备注：: Talk presented at the 2019 Meeting of the Division of Particles and Fields of the American Physical Society (DPF2019), July 29 - August 2, 2019, Northeastern University, Boston, C1907293

摘要：

我们提出了一个超对称推广的无反常和三族非普适$U(1)$模型，包含四个Higgs二重态和四个Higgs单线态.夸克部分通过添加三个奇异夸克单线态而扩展，而轻子部分包括两个奇异带电轻子单线态，三个右手中微子和三个无菌Majorana中微子以获得费米子质谱。通过实现一个额外的$\mathbb{Z}_2$对称性，汤川耦合项适合在这样一种方式，费米子质量层次得到没有微调。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，得出正序方案优于逆序方案.电子、上夸克、下夸克和奇夸克在树水平上是无质量的，但它们在一个环水平上通过辐射修正得到质量，辐射修正来自于slepton和Higgsinos贡献。我们表明，该模型预测一个类希格斯SM质量在电弱尺度下，通过使用VEV根据对称性破缺和费米子质量。

英文摘要：

We propose a supersymmetric extension of the anomaly-free and three families nonuniversal $U(1)$ model, with the inclusion of four Higgs doublets and four Higgs singlets. The quark sector is extended by adding three exotic quark singlets, while the lepton sector includes two exotic charged lepton singlets, three right-handed neutrinos and three sterile Majorana neutrinos to obtain the fermionic mass spectrum. 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 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. The electron and up, down and strange quarks are massless at tree level, but they get masses through radiative correction at one loop level coming from the sleptons and Higgsinos contributions. We show that the model predicts a like-Higgs SM mass at electroweak scale by using the VEV according to the symmetry breaking and fermion masses.

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摘要：

英文摘要：

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