# The 16th International Workshop on Tau Lepton Physics (TAU2021) (Virtual Edition)

September 27, 2021 to October 1, 2021
Indiana University
America/Indiana/Indianapolis timezone

## Measuring hadronic corrections to the muon g-2 at BESIII

Sep 30, 2021, 11:15 AM
20m
Virtual (Indiana University)

### Virtual

#### Indiana University

Oral contribution Tau2021 Abstracts

### Speakers

Achim Denig (Univ. Mainz) Achim Denig (Universität Mainz)

### Description

The recent Fermilab result has confirmed the long standing discrepancy between the direct measurement and the Standard Model (SM) prediction of the anomalous magnetic moment of the muon aμ=(gµ-2)/2. The possibility to improve the SM prediction using data-driven approaches 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 aμ. 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 aµ. The current status and ongoing investigations will be discussed.

What is your topic? Anomalous Magnetic Moment of the muon

### Primary authors

Achim Denig (Univ. Mainz)

### Presentation materials

 Tau21_Denig_pdf.pdf VideoTau2021_Denig.mp4