Experiment BESIII

The Institute of High Energy Physics of the Chinese Academy of Sciences in Beijing operates am electron-positron collider called BEPC-II (Beijing electron-positron collider II). It is designed for center-of-mass energies between 2 and 5 GeV, which allows to study charmonium with very high statistics. The design luminosity is 10^33 cm^2 s^-1. Since 2009, measurements are performed at various collision energies using the BESIII (beijing Spectrometer III) detector.

The key research ares are:

- Spectroscopy of light hadrons

- Spectroscopy of charmonium

- Electroweak and strong interaction studies at the charm scale

- Tau-lepton physics

- Searches for physics beyond the Standard Model

Detailled information about the BESIII physics program can be found in the physics book (arXiv:0809.1869). Mainz researchers participate in BESIII in the framework of the collaborative research center 1044.


Working groups from Institute of Nuclear Physics

Charmonium decays, partial wave analysis
Prof. Dr. Niklaus Berger

Hadronic cross-sections for the muon g-factor, two-photon physics and charmonium spectroscopy
Prof. Dr. Achim Denig

Open charm physics and CP-violation in the D-meson system
Prof. Dr. Wolfgang Gradl

Hadron structure and nucleon form-factors
Prof. Dr. Frank Maas


Institute for High Energy Physics of the Chinese Academy of Sciences