Bochum 2018 – scientific programme
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HK: Fachverband Physik der Hadronen und Kerne
HK 37: Hadron Structure and Spectroscopy VI
HK 37.5: Talk
Wednesday, February 28, 2018, 17:45–18:00, HZO 50
Measurement of the time-like π0 transition form factor at BESIII — •Thomas Lenz, Achim Denig, and Christoph Florian Redmer for the BESIII collaboration — Institut für Kernphysik, Johannes Gutenberg-Universität Mainz, Deutschland
Transition form factors of light pseudoscalar mesons play an important role in the calculations of hadronic contributions to the anomalous magnetic moment of the muon. The BESIII experiment at the e+ e− collider BEPCII in Beijing has collected more than 10 fb−1 of data at energies above 3.773 GeV. Based on these data the process e+ e− → π0 γ is studied. The analysis aims at the determination of the transition form factor of the π0 in a region of momentum transfer above 14 GeV2, which will also help to shed light on the discrepancy between results of the BaBar and Belle measurements in the space-like regime. In this presentation we will give an overview of the current status of the analysis.
Supported by DFG (SFB 1044).