https://doi.org/10.1140/epja/i2017-12219-4
Regular Article - Theoretical Physics
ND and NB systems in quark delocalization color screening model
1
Department of Quality-Oriented Education, Nanjing College of Information Technology, 210023, Nanjing, China
2
Department of Physics, Nanjing Normal University, 210023, Nanjing, China
* e-mail: jlping@njnu.edu.cn
Received:
2
December
2016
Accepted:
28
January
2017
Published online:
16
February
2017
The ND and NB systems with I = 0 and 1, 
, 
, and 
are investigated within the framework of the quark delocalization color screening model. The results show that all the positive-parity states are unbound. By coupling to the 
channel, the state ND with I = 0, 
can form a bound state, which can be invoked to explain the observed 
state. The mass of the with I = 0, 
is close to that of the reported 
, which indicates that can be explained as a 
molecular state in QDCSM. Besides, the 
with I = 1, 
is also a possible resonance state. The results of the bottom case of the NB system are similar to those of the ND system. Searching for these states will be a challenging subject of experiments.
© SIF, Springer-Verlag Berlin Heidelberg, 2017
