SMuK 2021 – scientific programme

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HK: Fachverband Physik der Hadronen und Kerne

HK 10: Hadron Structure and Spectroscopy II

HK 10.4: Talk

Tuesday, August 31, 2021, 15:15–15:30, H3

Feasibility Studies of Axial Meson Production in Two-Photon Fusion Processes at BESIII — •Nick Effenberger, Christoph Redmer, and Achim Denig for the BESIII collaboration — Institut für Kernphysik, Johannes Gutenberg-Universität, Mainz, Deutschland

The Standard Model prediction of the muon’s anomalous magnetic moment, a_µ, is completely limited in precision by the knowledge of the hadronic contributions. Data driven approaches have been developed to improve the calculations. Recent estimates demonstrate the importance of axial mesons with masses larger than 1 GeV for the hadronic Light-by-Light scattering contribution to a_µ.
The BESIII experiment, located at the BEPCII collider in Beijing, China, has collected data with center-of-mass energies residing in the τ-charm region. These can be used to study the production of axial mesons in two-photon fusion processes with quasi-real or virtual photons. In this presentation, we discuss the prospects of studying axial mesons decaying into the four pion final state containing charged pions only.