Hadronic contributions to theg-2of the muon

We compute the hadronic vacuum-polarization contributions aᵥ to the muon anomalous magnetic moment a_μ. To improve on previous calculations, we use QCD at large energies, and exploit the analyticity properties of the pion form factor. We find aᵥ=(7100±{}105±{}49)×{}10^-11, with which we have a_μ(theory)=(116 592 051±{}114±{}49)×{}10^-11. Purely QCD bounds for aᵥ are also presented.