https://doi.org/10.1140/epjc/s10052-015-3418-5
Regular Article - Theoretical Physics
Radially excited states of 
Department of Physics, Jiangsu Key Laboratory for Numerical Simulation of Large Scale Complex Systems, Nanjing Normal University, Nanjing, 210023, People’s Republic of China
* e-mail: jlping@njnu.edu.cn
Received:
23
December
2014
Accepted:
14
April
2015
Published online:
6
May
2015
In the framework of chiral quark model, the mass spectrum of 
is studied with Gaussian expansion method. With the wave functions obtained in the study of the mass spectrum, the open flavor two-body strong decay widths are calculated by using the 
model. The results show that the masses of 
and 
are consistent with the experimental data. The explanation of 
as 
is possible because the decay width of is in the range of the experimental value of . Although the mass of 
is about 110 MeV less than that of 
and the decay width of is much larger than that of , the assignment of as cannot be excluded due to the large uncertainty of the experimental decay width and the compatibility of the branching ratios of with that of , and the mass of can be shifted downwards by taking into account the coupling effect of the open charm channels. There are still no good candidates to 
and 
.
© SIF and Springer-Verlag Berlin Heidelberg, 2015
