Muon g−2 update

We present an update of the theoretical prediction of the muon g−2. Mainly new BaBar data and a new measurement of σππ by KLOE required a new update of the hadronic contribution, although no substantial change of previous estimates results. We also include a new calculation of the hadronic light-by-light contribution in the large-Nc framework. We find or . The new measurement of the τ spectral–function by Belle confirms the pattern of deviations observed between e+e− – and isospin rotated and corrected τ–data.