https://doi.org/10.1140/epjc/s10052-016-4342-z
Regular Article - Theoretical Physics
The 
and 
in the 
decay
1
Institute of Modern Physics, Chinese Academy of Sciences, Lanzhou, 730000, China
2
School of Physics and Nuclear Energy Engineering and International Research Center for Nuclei and Particles in the Cosmos, Beihang University, Beijing, 100191, China
3
State Key Laboratory of Theoretical Physics, Institute of Theoretical Physics, Chinese Academy of Sciences, Beijing, 100190, China
* e-mail: lisheng.geng@buaa.edu.cn
Received:
14
April
2016
Accepted:
29
August
2016
Published online:
10
September
2016
We propose to study the and the resonances in the decay via the final-state interactions of the 
and 
pairs. The weak interaction part proceeds through the c quark decay process: 
, while the hadronization part takes place in two mechanisms, differing in how the quarks from the weak decay combines into 
with a 
with the quantum numbers of the vacuum. Because the final and states are in pure isospin 
and 
combinations, the decay can be an ideal process to study the and resonances. Describing the final-state interaction in the chiral unitary approach, we find that the and invariant mass distributions, up to an arbitrary normalization, show clear cusp and peak structures, which can be associated with the and resonances, respectively. The proposed mechanism can provide valuable information on the nature of these resonances and can in principle be tested by facilities such as BEPCII.
© The Author(s), 2016
