https://doi.org/10.1140/epjc/s10052-015-3578-3
Regular Article - Theoretical Physics
decay width as a charmonium-like tetraquark state
1
Department of Physics and Engineering Physics, University of Saskatchewan, Saskatoon, SK, S7N 5E2, Canada
2
School of Physics and Nuclear Energy Engineering and International Research Center for Nuclei and Particles in the Cosmos, Beihang University, Beijing, 100191, China
3
School of Physics and State Key Laboratory of Nuclear Physics and Technology, Peking University, Beijing, 100871, China
4
Collaborative Innovation Center of Quantum Matter, Beijing, 100871, China
5
Center of High Energy Physics, Peking University, Beijing, 100871, China
* e-mail: hxchen@buaa.edu.cn
Received:
21
May
2015
Accepted:
23
July
2015
Published online:
5
August
2015
To identify the nature of the newly observed charged resonance , we study its hadronic decays 
and 
as a charmonium-like tetraquark state. In the framework of the QCD sum rules, we calculate the three-point functions and extract the coupling constants and decay widths for these interaction vertices. Including all these channels, the full decay width of the state is consistent with the experimental value reported by the Belle Collaboration, supporting the tetraquark interpretation of this state.
© The Author(s), 2015
