Measurements of the Hadronic Cross Section and of Meson Transition Form Factors at BESIII for an improved Standard Model Prediction of (g-2)mu

TL;DR

The BESIII experiment measures meson transition form factors and hadronic cross sections to refine Standard Model predictions of the muon's anomalous magnetic moment, (g-2)mu.

Contribution

It provides new experimental data on meson form factors and hadronic cross sections to reduce uncertainties in (g-2)mu calculations.

Findings

Preliminary results on meson transition form factors.

Improved estimates of hadronic vacuum polarization.

Enhanced understanding of hadronic light-by-light contributions.

Abstract

The BESIII experiment at the Beijing tau-charm factory BEPCII recently has embarked on a series of form factor measurements with the goal to improve the hadronic vacuum polarization as well as the hadronic light-by-light contributions to (g-2)mu. The status of the flagship measurements and preliminary results are presented