https://doi.org/10.1140/epjc/s10052-020-8274-2
Regular Article - Theoretical Physics
The newly observed 
structure and its 
-mode nonstrange partners
1
Department of Physics, Hunan Normal University, Changsha, 410081, China
2
Synergetic Innovation Center for Quantum Effects and Applications (SICQEA), Changsha, 410081, China
3
Key Laboratory of Low-Dimensional Quantum Structures and Quantum Control of Ministry of Education, Changsha, 410081, China
* e-mail: lvqifang@hunnu.edu.cn
Received:
1
May
2020
Accepted:
21
July
2020
Published online:
1
August
2020
Inspired by the newly observed 
structure, we investigate its strong decay behaviors under various assignments within the 
model. Compared with the mass and total decay width, our results suggest that the can be regarded as the lowest -mode excitation in 
family. Then, the strong decays of -mode nonstrange partners for the are calculated. It is found that the 
and 
states are relatively narrow, and mainly decay into the 
and 
final states, respectively. These two states have good potentials to be observed in future experiments, which may help us to distinguish the three-quark model and diquark model.
© The Author(s), 2020
