Speaker
Description
The appearance of data-driven approaches to improve the Standard Model prediction of the anomalous magnetic moment of the muon $a_\mu$ has motivated the BESIII collaboration to embark on a dedicated experimental program. The high statistics data samples collected with the BESIII experiment in $e^+e^-$ collisions in the $\tau$-charm region are analyzed exploiting the initial state radiation technique in order to measure hadronic cross sections needed in the dispersive analysis of the hadronic Vacuum Polarization contribution to $a_\mu$. The same data enable investigations of two-photon collisions. These allow the determination of the momentum dependence of transition form factors of light mesons in the relevant kinematic region, which dominate the hadronic Light-by-Light contribution to $a_\mu$. The current status and ongoing investigations will be discussed.