https://doi.org/10.1140/epja/i2014-14165-y
Regular Article - Theoretical Physics
Comprehending heavy charmonia and their decays by hadron loop effects
1
Department of Physics, Southeast University, 211189, Nanjing, P. R. China
2
Interdisciplinary Center for Theoretical Study, University of Science and Technology of China, 230026, Hefei, China
3
State Key Laboratory of Theoretical Physics, Institute of Theoretical Physics, Chinese Academy of Sciences, 100190, Beijing, China
* e-mail: zhouzhy@seu.edu.cn
Received:
18
July
2014
Revised:
25
October
2014
Published online:
31
October
2014
We present that including the hadron loop effects could help us to understand the spectrum of the heavier charmonium-like states and their strong decays simultaneously. By coupling the bare states to the opened thresholds, the pole positions which correspond to the observed states are shifted from the bare states predicted in the potential model to the complex energy plane. The pole masses are generally pulled down from the bare masses and the open-charm decay widths are related to the imaginary parts of the pole positions. Moreover, we also analyze the pole trajectory of 
state while the quark pair production rate from the vacuum varies in its uncertainty region, which indicates that the enigmatic 
state may be regarded as a state originating from the 
state by coupling to hadron loops as the others.
© SIF, Springer-Verlag Berlin Heidelberg, 2014
