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HK: Fachverband Physik der Hadronen und Kerne
HK 28: Hadron Structure and Spectroscopy 6
HK 28.5: Talk
Tuesday, March 24, 2015, 15:45–16:00, T/SR25
Measurement of space-like η and η′ transition form factors at BESIII — •Michael Diefenbach, Achim Denig, and Christoph Redmer — Institut für Kernphysik, Universität Mainz, Deutschland
Transition form factors of light pseudoscalar mesons are an important ingredient to 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 2.9 fb−1 of data at the center of mass energy of 3.773 GeV. Based on these data two-photon collisions are studied using a single-tag technique. The analysis aims at the determination of the transition form factors of η and η′ mesons in a region of momentum transfer below 3 GeV2. In this presentation we will give an overview of the current status of the analysis.
Supported by DFG (SFB 1044).