Muon anomalous magnetic moment and lepton flavor violation

A nonuniversal interaction, which involves only the third family leptons, induces lepton flavor violating couplings and contributes to the anomalous magnetic moment of the muon. In this paper, we study the effects of nonuniversal interaction on muon $\left(g-2\right)$ and the rare decay $\overrightarrow{\tau }\mu \gamma$ by using an effective Lagrangian technique, and a phenomenological $Z^{\prime }$ model where $Z^{\prime }$ couples only to the third family lepton. We find that the deviation from the theory can be explained and the induced $\overrightarrow{\tau }\mu \gamma$ rate could be very close to the current experimental limit. In the $Z^{\prime }$ model, $M_{Z^{\prime }}$ has to be lighter than 2.6 TeV.