Tau data-driven evaluation of the Hadronic Vacuum Polarization

Windows in Euclidean time have become a standard tool for comparing lattice QCD and data-driven computations of the hadronic vacuum polarization (HVP) contribution to the muon $g-2$. Here we review our results, obtained using isospin-rotated ${\tau }^{-}\to {\pi }^{-}{\pi }^0{\nu }_{\tau }$ data instead of $e^{+}{e}^{-}\to {\pi }^{+}{\pi }^{-}$ measurements, and compare them to other approaches. Consistency of the tau-based and lattice results hints to underestimated uncertainties in the $e^{+}{e}^{-}$ data. If that is the case, the theory prediction of the muon $g-2$ would only lie at $\sim 2\sigma$ from its measured value.