Anomalous magnetic moment of the τ lepton

Abstract
We evaluate the magnetic moment μ=geħ/2mτc of the τ lepton. This is interesting from a purely theoretical point of view, although an experimental measurement, though difficult, may be possible in the future. Our result, including strong- and weak-interaction contributions, which are large, is aτ=(g-2)/2=11 773(3)×107.