Bochum 2018 – wissenschaftliches Programm
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HK: Fachverband Physik der Hadronen und Kerne
HK 1: Hadron Structure and Spectroscopy I
HK 1.4: Vortrag
Montag, 26. Februar 2018, 15:00–15:15, HZO 50
Study of Light Hadrons in radiative J/Ψ Decays at BESIII — •Jens Olaf Frech — Ruhr-Universität Bochum, Inst. für Experimentalphysik I, 44801 Bochum
The BESIII experiment, which is located at the symmetric electron-positron collider BEPCII in Beijing, has a center of mass energy between √s=(2−4.6) GeV. It has recorded 1.3· 109 J/Ψ events.
Lattice QCD predicts the lowest lying scalar glueball at a mass of 1.5 and 1.7 GeV/c2. This leads to a mixing with the nearby mesons, which complicates the identification of glueballs. Radiative J/Ψ decays into two pseudoscalars provide an opportunity to study the states observed in the relevant region, as only intermediate states with even total angular momenta are allowed.
Using the large J/Ψ data sample mentioned above, the reaction J/Ψ → γ η η is studied, since it is a gluon rich process.
A status report for the study of the glueball candidates f0(1500) and f0(1710) will be presented.
Supported by DFG (FOR 2359)