Bonn 2020 – scientific programme

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HK: Fachverband Physik der Hadronen und Kerne

HK 23: Hadron Structure and Spectroscopy VI

HK 23.4: Talk

Wednesday, April 1, 2020, 15:15–15:30, J-HS M

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

The precision of the Standard Model prediction of the anomalous magnetic moment of the muon, a_µ, is completely limited by the knowledge of the hadronic contributions. Data driven approaches have been developed to improve the calculations. Recent calculations demonstrate the importance of axial and tensor 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 and tensor mesons in two-photon fusion processes with quasi-real or virtual photons. In this presentation, we discuss the prospects of studying axial and tensor mesons decaying into three or four pion final states. — Supported by DFG SFB1044.