发表机构
Hebei University; Key Laboratory of High-precision Computation and Application of Quantum Field Theory of Hebei Province; Research Center for Computational Physics of Hebei Province（河北大学; 河北省量子场论高精度计算与应用重点实验室; 河北省计算物理研究中心）
机构由 AI 辅助整理，请以论文原文为准。AI 中文总结
在味依赖U(1)_F模型中，研究人员结合缪子反常磁偶极矩的最新实验约束，发现该模型的新相互作用可显著贡献于轻子味破坏过程，预测分支比可达未来实验灵敏度，为新物理研究提供了方向。
AI 中文摘要
轻子味破坏（LFV）过程在标准模型（SM）中是被禁止的，因此LFV转变的观测将代表超出SM的新物理的明确信号。本工作在带有U(1)_F定域规范对称性的SM扩展模型（FDM）中，研究缪子反常磁偶极矩（MDM）以及LFV过程l_j^-→l_i^-γ、l_j^-→l_i^-l_i^-l_i^+。缪子反常MDM是粒子物理中测量精度最高的物理量之一，可用于约束FDM中新耦合的贡献。新引入的U(1)_F荷与费米子的味性质相关，因此新增的汤川耦合会对这些LFV过程产生贡献。考虑缪子反常MDM的最新实验约束，FDM中的新相互作用可对LFV过程l_j^-→l_i^-γ和l_j^-→l_i^-l_i^-l_i^+产生显著贡献，预测的分支比可达到未来实验的灵敏度。
英文摘要
Lepton flavor violation (LFV) processes are forbidden in the standard model (SM), hence the observation of LFV transitions would represent a clear signal of new physics beyond the SM. In this work, we investigate the muon anomalous magnetic dipole moments (MDM) and LFV processes $l_{j}^{-}\to l_{i}^{-}γ$ and $l_{j}^{-}\to l_{i}^{-}l_{i}^{-}l_{i}^{+}$ in the extension of the SM with $U(1)_F$ local gauge symmetry (FDM). The muon anomalous MDM is one of the most precisely measured quantities in particle physics, which can be used to constrain the contributions from new couplings in the FDM. The newly incorporated $U(1)_F$ charges are correlated with the flavor properties of fermions, hence the newly added Yukawa couplings make contributions to these LFV processes. Considering the latest experimental constraints on the muon anomalous MDM, the new interactions in the FDM can make significant contributions to the LFV processes $l_{j}^{-}\to l_{i}^{-}γ$ and $l_{j}^{-}\to l_{i}^{-}l_{i}^{-}l_{i}^{+}$, the predicted branching ratios can well reach the future experimental sensitivity.
Comments31 pages, 7 figures
