Münster 2017 – wissenschaftliches Programm

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HK: Fachverband Physik der Hadronen und Kerne

HK 57: Hadron Structure and Spectroscopy VII

HK 57.6: Vortrag

Freitag, 31. März 2017, 15:45–16:00, F 5

Study of Light Mesons in Two-Photon Fusion at BESIII — •Marvin Richter for the BESIII collaboration — Institut für Experimentalphysik I, Ruhr-Universität Bochum

The BESIII experiment at the symmetric electron-positron collider BEPCII in Beijing has recorded large data samples at center of mass energies up to 4.6 GeV. The data recorded above the ψ(2S) resonance is well suited to study the production of light meson resonances in two-photon fusion.
From these processes the two-photon width of contributing resonances can be derived, which is an important measure to understand their nature. Various final states are studied to access resonances such as η(1405) and η(1475), which are discussed to be an admixture of conventional qq states and a glueball. For these efforts the two-photon event generator GamGam previously utilized by the CLEOc and BaBar collaborations has been migrated from Fortran77 to C++ and optimized.
In this contribution preliminary results and the status of the event generator are presented.
This work is supported by the DFG (FOR 2359)

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