τ−→ ℓi−ℓi+ℓj−ν̄jντ decays with a magnetic dipole term

Abstract

Using the massive helicity formalism, we calculate the five-body average square amplitude of the decays [Formula: see text] [Formula: see text] within the Standard Model (SM), we then introduce a dimension-five effective vertex [Formula: see text] in order to determine the feasibility of imposing limits on the tau anomalous magnetic dipole moment [Formula: see text] via the current or future experimental measurements of the branching ratio for the decay [Formula: see text].