Bereiche | Tage | Auswahl | Suche | Aktualisierungen | Downloads | Hilfe
HK: Fachverband Physik der Hadronen und Kerne
HK 10: Hadron Structure and Spectroscopy I
HK 10.2: Vortrag
Montag, 11. März 2024, 17:15–17:30, HBR 62: EG 18
Investigation of the decays χcJ→η′π+π− and search for the spin exotic meson π1(1600) at BESIII — •Frederik Weidner, Salleh Ahmed, Anja Brüggemann, Nikolai in der Wiesche, and Alfons Khoukaz — Universität Münster, Münster, Germany
In recent years the search for exotic hadrons has uncovered more and more states which seem to be incompatible with the conventional classification as two or three quark states. Some of these have quantum numbers, which cannot be produced by the conventional quark model, such as JPC=1−+ in case of the π1(1600), which is discussed to be in a hybrid multiplet together with the η1(1855).
With the BESIII experiment decays of the χcJ mesons can be investigated through their production in radiative decays of the ψ(2S) meson. When considering the decay of these charmonia into three pseudoscalar mesons, spin exotic quantum numbers like JPC=1−+ can be accessed. Additionally, precision measurements of branching ratios of the χcJ states can help solidify our understanding of charmonia and, therefore, of the transition region between perturbative and non-perturbative QCD. In this talk the search for the π1(1600) in the decay χc2→η′π+π− using a partial wave analysis, and the determination of branching ratios of χcJ→η′π+π−, will be presented.
This work is supported by the German Research Foundation under project number 443159800 and GRK 2149/2 and by the Ministry for Culture and Science of the State North Rhine-Westphalia under funding code NW21-024-E.
Keywords: Charmonium; Hybrid; Light meson; Exotic state; Partial wave analysis