Bochum 2018 – wissenschaftliches Programm

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HK: Fachverband Physik der Hadronen und Kerne

HK 1: Hadron Structure and Spectroscopy I

HK 1.2: Vortrag

Montag, 26. Februar 2018, 14:30–14:45, HZO 50

Inclusive charmonium production in energy region above 4 GeV at the BESIII experiment — •Simon Nakhoul, Klaus Goetzen, Ralf Kliemt, Frank Nerling, and Klaus Peters for the BESIII collaboration — GSI Helmholtz Center for heavy Ion research, Planckstrasse 1, Darmstadt, Germany

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 like the observation of Z_c(3900) and Z_c(4020). 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, K_sK_s) at center of mass energies above 4 GeV. The aim of this analysis is to search for new unobserved XYZ decay channels and to provide accurate inclusive cross section measurements for e⁺e⁻ → X_{c c} + π⁺ π⁻ (X_{c c}=J/ψ,h_c,ψ(2S) ...) and compare them to the corresponding exclusive BESIII measurements.
* This work is supported by HGS-HIRe.