Bonn 2020 – wissenschaftliches Programm
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HK 33.5: Vortrag
Mittwoch, 1. April 2020, 17:45–18:00, J-HS A
Inclusive charmonium mesons production above 4 GeV — •Simon Nakhoul1,2, Klaus Götzen1, Ralf Kliemt1, Frank Nerling1,2, and Klaus Peters1,2 — 1GSI Helmholtzzentrum für Schwerionenforschung — 2Goethe-Universität Frankfurt
Since 2003, the XYZ charmonium-like states have become a hot topic in the hadron spectroscopy field. The Beijing Spectrometer III (BESIII) at the Beijing Electron-Positron Collider II (BEPC II) is one of the leading experiments in the XYZ-related physics. It has brought us numerous breakthrough discoveries, e.g., the first observation of the Zc(3900). In order to understand the nature of these intriguing states and their decay patterns, an inclusive analysis is performed using the recoil mass technique approach for different particles (π+π−, K+K−, π0π0...) at center of mass energies above 4 GeV. The aim of this analysis is to search for new unobserved Y(4260) decay channels and to provide accurate inclusive cross section measurements for e+e− → Xcc + π+π− (Xcc = J/ψ, hc , ψ(2S)) then compare them to the corresponding exclusive BESIII measurements.