发表机构
University of Cambridge（剑桥大学）
机构由 AI 辅助整理，请以论文原文为准。AI 中文总结
研究Plan B模型对中微子质量与混合角的影响，发现结合clockwork机制的Froggatt-Nielsen机制可利用量级为1的基本无量纲耦合拟合中微子振荡数据，该模型还能解释夸克混合矩阵非对角元的小量级。
AI 中文摘要
Plan B模型的提出旨在提升标准模型对涉及$b\rightarrow s \tau^+ \tau^-$跃迁的可观测量的全局拟合质量，同时定性解释部分夸克混合矩阵非对角元的小量级。该模型基于向标准模型引入额外的自发破缺$U(1)_{3B_3-L_e-2L_\tau}$规范对称性，并赋予费米子与代相关的荷；模型包含右手征中微子场以抵消规范反常。我们研究Plan B模型对中微子质量与混合角的影响，该模型自然为中微子质量和混合层级提供了Froggatt-Nielsen机制，且在存在clockwork机制的额外抑制时，Froggatt-Nielsen机制的应用可行；我们还展示了利用量级为1的基本无量纲耦合即可拟合当前中微子振荡数据。
英文摘要
The Plan B Model was proposed to improve the global fit quality of the Standard Model to observables involving the $b\rightarrow s \ell^+ \ell^-$ transition whilst simultaneously providing a qualitative explanation for the small magnitudes of some off-diagonal quark mixing matrix entries. The model is based on applying an additional spontaneously broken $U(1)_{3B_3-L_e-2L_μ}$ gauge symmetry to the Standard Model with family-dependent fermion charges. Right-handed neutrino fields are present and cancel gauge anomalies. We investigate the implications of the Plan B Model for neutrino masses and mixing angles. The model naturally suggests a Froggatt-Nielsen mechanism for neutrino masses and mixing hierarchies. We find that an implementation of the Froggatt-Nielsen mechanism works when additional suppression is present from a clockwork mechanism. We show how current neutrino oscillation data can be fit with order unity fundamental dimensionless couplings.
Comments26 pages, 9 figures. v2 has additional references and minor corrections
