| Issue |
EPJ Web Conf.
Volume 303, 2024
The 16th International Conference on Meson-Nucleon Physics and the Structure of the Nucleon (MENU 2023)
|
|
|---|---|---|
| Article Number | 01002 | |
| Number of page(s) | 7 | |
| Section | Hadron Spectroscopy | |
| DOI | https://doi.org/10.1051/epjconf/202430301002 | |
| Published online | 25 September 2024 | |
https://doi.org/10.1051/epjconf/202430301002
Observation of e+e− → χc1 at BESIII
Institute of Nuclear Physics, University of Münster, Wilhelm-Klemm-Straße 9, 48149 Münster, Germany
* e-mail: a_drie04@uni-muenster.de
Published online: 25 September 2024
In electron-positron annihilations, the process of e+e− → χc1 can occur via the production of two virtual photons or through neutral current, therefore being suppressed with respect to the normal annihilation process via one virtual photon. Using a dedicated scan sample around the χc1 mass, the direct production of χc1 has been established for the first time in experiments. This provides a new approach for the study of the internal nature of hadrons.
© The Authors, published by EDP Sciences, 2024
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