Mainz 2022 – scientific programme
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HK: Fachverband Physik der Hadronen und Kerne
HK 31: Hadron Structure and Spectroscopy V
HK 31.2: Talk
Tuesday, March 29, 2022, 16:30–16:45, HK-H8
Search for the Strange Charmonium-like State Zcs in the Reaction e+e−→ηcK*K with BESIII — •Frederik Weidner1, Nienke Balz1, Helge Balzen1, Johannes Bloms1, Anja Brüggemann1, Christopher Fritzsch1, Titus Heinig1, Nils Hüsken2, Nikolai in der Wiesche1, Lois Kröger1, Sascha Lennartz1, Peter Sandmann1, and Alfons Khoukaz1 for the BESIII collaboration — 1Westfälische Wilhelms-Universität, Münster, Germany — 2Indiana University, Bloomington, USA
In recent years the search for exotic hadrons has identified more and more states which seem to be incompatible with the conventional classification of hadrons as a two or three quark state. However, in most cases the classification of these particles is still inconclusive. One of the areas to search for them is the charmonium region where states have been found which carry isospin or strangeness. These states, called Zc(s), are good candidates for four quark states.
With the newly taken datasets between 4.6 and 4.9 GeV BESIII is searching for Zc(s) states. In this report the search for the Zcs in the decay Zcs→ηcK* is presented as this decay is predicted to be one of the main decay channels of the Zcs. Since the ηc meson does not have a golden channel for its reconstruction, in total 14 different decays are considered in a combined fit including three recoiling systems (K*K=K*+K−,K*−K+ and K*0Ks). In the end the product of the production cross section and the branching ratio will be calculated.
This work is funded by the Deutsche Forschungsgemeinschaft (DFG, German Research Foundation) - 269952272, 271236083 and 443159800.