https://doi.org/10.1140/epjc/s10052-020-7759-3
Regular Article - Theoretical Physics
Strong decays of the newly observed narrow 
structures
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:
7
January
2020
Accepted:
19
February
2020
Published online:
3
March
2020
Motivated by the newly observed narrow structures 
, 
, 
, and 
in the 
mass spectrum, we investigate the strong decays of the low-lying states within the 
model systematically. According to their masses and decay widths, the observed , , , and resonances can be reasonably assigned as the 
mode 
states with 
, and 
. Meanwhile, the remaining 
wave state with 
should have a rather broad width, which can hardly be observed by experiments. For the 
and 
states, our predictions show that these states have relatively narrow total widths and mainly decay into the 
, 
and 
final states. These abundant theoretical predictions may be valuable for searching more excited states in future experiments.
© The Author(s), 2020
