Model independent bounds on the tau lepton electromagnetic and weak magnetic moments

Gabriel A. González-Sprinberg, Arcadi Santamaria, Jordi Vidal
2000 Nuclear Physics B  
Using LEP1, SLD and LEP2 data, for tau lepton production, and data from CDF, D0 and LEP2, for W decays into tau leptons, we set model independent limits on non-standard electromagnetic and weak magnetic moments of the tau lepton. The most general effective Lagrangian giving rise to tau moments is used without further assumptions. Precise bounds ($2\sigma$) on the non-standard model contributions to tau electromagnetic ($-0.007<a_\gamma< 0.005$), tau Z-magnetic ($-0.0024 <a_Z< 0.0025$) and tau
more » ... 0.0025$) and tau W-magnetic ($-0.003 < \kappa^W < 0.004$) dipole moments are set from the analysis.
doi:10.1016/s0550-3213(00)00275-3 fatcat:dd5gl76rybcyjguoexcspp4hnu