Dipole moments of the tau neutrino via the process ${e^{+}e^{-}\rightarrow \nu\bar\nu \gamma}$ in a 331 model

Abstract

The limits on the anomalous magnetic and electric dipole moments of the ν _τ through the reaction $e^{+}e^{-}\rightarrow \nu \bar \nu \gamma$ at the Z ₁-pole, and in the framework of a 331 model are obtained. The results are based on the data reported by the L3 Collaboration at LEP. We find that the bounds are almost independent of the mixing angle ϕ of the model in the allowed range for this parameter.