Hadronic contributions to a_ within resonance chiral theory

Abstract We review the recent progress achieved, using resonance chiral theory, in the hadronic contributions to the muon anomalous magnetic moment. These include the hadronic vacuum polarization, either using e^+e^- e + e - or τ decays into hadron final states as input; and the hadronic light-by-light part, where in addition to previous results on the lightest pseudoscalar and tensor-poles contributions, we first present the evaluation of the pseudoscalar box using this formalism. We also discuss the scalar, axial-pole and other subleading pieces. The results obtained are consistent with the White Paper 2 values, with comparable precision.