Revisit of the electromagnetic correction to $\tau \to \pi \pi {\nu }_{\tau }$ and its implication for muon $g-2$ based on $\tau$ data

Zhi-Xin Li, Ao Li, Jin Hao +2

In this work we focus on the evaluation of the leading-order hadronic vacuum polarization contribution from the $\pi \pi$ channel to the muon anomalous magnetic moment $a_{\mu }$ by using th…