https://doi.org/10.1140/epjc/s10052-016-4403-3
Regular Article - Theoretical Physics
Exploring open-charm decay mode 
of charmonium-like state Y(4630)
1
School of Physics, Nankai University, Tianjin, 300071, China
2
School of Science, Tianjin University, Tianjin, 300072, China
3
School of Physical Science and Technology, Lanzhou University, Lanzhou, 730000, China
4
Research Center for Hadron and CSR Physics, Lanzhou University and Institute of Modern Physics of CAS, Lanzhou, 730000, China
* e-mail: liuxuewen@mail.nankai.edu.cn
Received:
14
June
2016
Accepted:
26
September
2016
Published online:
6
October
2016
The newly observed X, Y, Z exotic states are definitely not in the standard 
structures, thus their existence composes a challenge to our understanding on the fundamental principles of hadron physics. Therefore the studies on their decay patterns which are determined by the non-perturbative QCD will definitely shed light on the concerned physics. Generally the four-quark states might be in a molecular state or tetraquark or their mixture. In this work, we adopt the suggestion that Y(4630) is a charmonium-like tetraquark made of a diquark and an anti-diquark. If it is true, its favorable decay mode should be Y(4630) decaying into an open-charm baryon pair, since such a transition occurs via strong interaction and is super-OZI-allowed. In this work, we calculate the decay width of 
in the framework of the quark pair creation model. Our numerical results on the partial width computed in the tetraquark configuration coincide with the Belle data within a certain error tolerance.
© The Author(s), 2016
