https://doi.org/10.1140/epjc/s10052-019-7121-9
Regular Article - Theoretical Physics
Charged charmoniumlike structures in the 
process based on the ISPE mechanism
1
School of Physical Science and Technology, Lanzhou University, Lanzhou, 730000, China
2
Research Center for Hadron and CSR Physics, Institute of Modern Physics of CAS, Lanzhou University, Lanzhou, 730000, China
3
School of Physics, Southeast University, Nanjing, 210094, China
4
Tokyo Kasei University, 1-18-1 Kaga, Itabashi, Tokyo, 173-8602, Japan
5
Theoretical Research Division, Nishina Center, RIKEN, Wako, Saitama, 351-0198, Japan
* e-mail: xiangliu@lzu.edu.cn
Received:
3
June
2019
Accepted:
8
July
2019
Published online:
19
July
2019
In 2017, the BESIII Collaboration announced the observation of a charged charmonium-like structure in the 
invariant mass spectrum of the process at different energy points, which enables us to perform a precise study of this process based on the initial single pion emission (ISPE) mechanism. In this work, we perform a combined fit to the experimental data of the cross section of , and the corresponding and dipion invariant mass spectra. Our result shows that the observed charged charmonium-like structure in can be well reproduced based on the ISPE mechanism, and that the corresponding dipion invariant mass spectrum and cross section can be depicted with the same parameters. In fact, it provides strong evidence that the ISPE mechanism can be an underlying mechanism resulting in such novel a phenomenon.
© The Author(s), 2019
