https://doi.org/10.1140/epjc/s10052-013-2635-z
Regular Article - Theoretical Physics
Z c (4025) as the hadronic molecule with hidden charm
1
Research Center for Hadron and CSR Physics, Lanzhou University and Institute of Modern Physics of CAS, Lanzhou, 730000, China
2
School of Physical Science and Technology, Lanzhou University, Lanzhou, 730000, China
3
Nuclear Theory Group, Institute of Modern Physics of CAS, Lanzhou, 730000, China
4
Department of Physics and State Key Laboratory of Nuclear Physics and Technology, Peking University, Beijing, 100871, China
* e-mail: xiangliu@lzu.edu.cn
** e-mail: zhusl@pku.edu.cn
Received:
20
September
2013
Revised:
12
October
2013
Published online:
5
November
2013
We have studied the loosely bound 
system. Our results indicate that the recently observed charged charmonium-like structure Z
c
(4025) can be an ideal molecular state. We have also investigated its pionic, dipionic, and radiative decays. We stress that both the scalar isovector molecular partner Z
c0 and three isoscalar partners 
should also exist if Z
c
(4025) is a molecular state in the framework of the one-pion-exchange model. Z
c0 can be searched for in the channel e
+
e
−→Y→Z
c0(4025)(ππ)P-wave where Y can be Y(4260) or any other excited 1−− charmonium or charmonium-like states such as Y(4360), Y(4660), etc. The isoscalar molecular states 
with 0+(0++) and 0+(2++) can be searched for in the three pion decay channel 
. The isoscalar molecular state 
with 0−(1+−) can be searched for in the channel 
. Experimental discovery of these partner states will firmly establish the molecular picture.
© Springer-Verlag Berlin Heidelberg and Società Italiana di Fisica, 2013
