Isospin-breaking effects in inclusive hadronic $\tau$ data for the muon $(g-2)$ from first principles

Mattia Bruno, Taku Izubuchi, Christoph Lehner +3

The knowledge of isospin-breaking effects in hadronic $\tau$ decays is required for a high-precision determination of the Hadronic-Vacuum-Polarization contribution to $(g-2{)}_{\mu }$ from e…