EPJ Web of Conferences 303, 01024 (2024)
https://doi.org/10.1051/epjconf/202430301024

Charmonium-like States at BESIII

Institute for Nuclear Physics, University of Münster, Wilhelm-Klemm-Straße 9, 48149 Münster, Germany

^* e-mail: f.weidner@uni-muenster.de

Published online: 25 September 2024

Abstract

Using e⁺e⁻ annihilation data taken by the BESIII detector, several searches for charmonium-like states were performed: In e⁺e⁻→D_s^*+D_s^*− using datasets with center-of-mass energies of 4:23 GeV to 4:95 GeV corresponding to a total integrated luminosity of 15:67 fb⁻¹, three peaks around 4:19 GeV, 4:41 GeV and 4:79 GeV were observed. In e⁺e⁻ → D^*0D^*−π⁺ at 4:19 GeV to 4:95 GeV corresponding to L_int = 17:9 fb⁻¹, three peaks at 4:20 GeV, 4:47 GeV and 4:67 GeV were identified. And in ψ(3770) → γηη′, γπ⁺π⁻ J/ψ with L_int = 2:93 fb⁻¹ an upper limit on the production of a scalar partner of the χ_c1(3872) was determined.