Limits on the electromagnetic and weak dipole moments of the tau-lepton in a 331 model

Abstract

Using as an input the data obtained by the L3 and OPAL Collaborations for the reaction e+e− → τ+τ−γ at the Z1-pole, we obtained bounds on the electromagnetic and weak dipole moments of the tau-lepton in the context of a 331 model. Our bounds on the electromagnetic moments are consistent with the bounds obtained by the L3 and OPAL Collaborations for the reaction e+e− → τ+τ−γ. We also obtained bounds on the tau weak dipole moments which are consistent with the bounds obtained recently by the DELPHI, ALEPH and BELLE Collaborations from the reaction e+e− → τ+τ−. Our work complements other studies on the electromagnetic and weak dipole moments of the tau-lepton.