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HK: Fachverband Physik der Hadronen und Kerne
HK 40: Hadron Structure and Spectroscopy VI
HK 40.5: Vortrag
Mittwoch, 20. März 2019, 17:45–18:00, HS 13
Coupled partial wave analysis of two-photon reactions at BESIII — •Meike Küßner — Institut für Experimentalphysik I, Ruhr-Universität Bochum
The BESIII experiment at the BEPCII electron-positron collider in Beijing offers excellent opportunities to study two-photon reactions, due to the numerous high statistics data samples which were recorded at center of mass energies between √s=2−4.6 GeV.
Decades ago, particles that consist solely of gluons, so-called glueballs, have been predicted from theory.
According to present knowledge, lattice-QCD predicts several glueball candidates in the mass range of light mesons between 1.5 and 4 GeV/c2.
Studying the nature of light mesons in two-photon decays, offers indirect information of their gluonic content and acts as a glueball filter. However, it turns out that experimental identification of glueballs is often ambiguous due to the mixing of glueballs with ordinary mesons and interference.
In this analysis a coupled partial wave analysis will be used to disentangle these ambiguities.
Besides a discussion of the performed data selection, preliminary results of the performed partial wave analysis will be presented as well as future perspectives.
Supported by DFG (FOR 2359)