Münster 2017 – wissenschaftliches Programm

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HK: Fachverband Physik der Hadronen und Kerne

HK 28: Hadron Structure and Spectroscopy IV

HK 28.3: Vortrag

Mittwoch, 29. März 2017, 17:30–17:45, F 5

Study of χ_c Decays into η′   π⁰ π⁰ at BES III — •Maximilian Hegenbarth for the BESIII collaboration — Ruhr-Universität Bochum, Institut für Experimentalphysik I, 44780 Bochum

The BESIII experiment, which is located at the symmetric e⁺e⁻ collider BEPCII in Beijing, has recorded a data sample corresponding to about 448 × 10⁶ ψ(2S) events. In the radiative transitions ψ(2S)→ γ   χ_cJ the charmonium P-wave states are copiously produced. Their decays into light hadrons provide a clean source in search for exotic hadrons. A spin-exotic 1⁺⁻ state decaying into π⁺η has recently been reported by the CLEOc collaboration in the decay χ_c1 → η′   π⁺ π⁻. To search for neutral partner states we study the decay χ_cJ → η′   π⁰ π⁰. Preliminary results of this study will be presented.
This work is supported by the DFG (FOR 2359)