Anomalous magnetic and electric moments of $τ$ and lepton flavor mixing matrix in effective lagrangian approach

Zhang, J. Q.; Song, X. C.; Huo, W. J.; Feng, T. F.

Anomalous magnetic and electric moments of $τ$ and lepton flavor mixing matrix in effective lagrangian approach

Authors

Description

In an effective lagrangian approach [EM97] to new physics, the authors in ref. [HL99] pushed tau anomalous magnetic and electric dipole moments (AMDM and EDM) down to $10^{-11}$ and $10^{-25} e cm$ by using a Fritzsch-Xing lepton mass matrix ansatz. In this note, we find that, in this approach, there exists the connection between $τ$ AMDM and EDM and the lepton flavor mixing matrix. By using the current neutrino oscillation experimental results, we investigate the parameter space of lepton mixing angles to $τ$ AMDM and EDM. We can obtain the same or smaller bounds of $δa_τ$ and $d_τ$ acquired in ref. [HL99] and constrain $θ_l$ (the mixing angle obtained by long-baseline neutrino oscillation experiments) from $τ$ AMDM and EDM.
10 pages, 4 figures, accepted by Commu. Theor. Phys