https://doi.org/10.1140/epjc/s10052-020-7944-4
Regular Article - Theoretical Physics
Revisiting the 
as a hadronic molecule and its strong decays
1
School of Physics and Beijing Advanced Innovation Center for Big Data-based Precision Medicine, Beihang University, Beijing, 100191, China
2
Institute of Modern Physics, Chinese Academy of Sciences, Lanzhou, 730000, China
3
School of Nuclear Sciences and Technology, University of Chinese Academy of Sciences, Beijing, 101408, China
4
School of Physics and Microelectronics, Zhengzhou University, Zhengzhou, 450001, Henan, China
* e-mail: xiejujun@impcas.ac.cn
Received:
20
March
2020
Accepted:
17
April
2020
Published online:
6
May
2020
Recently, the Belle collaboration measured the ratios of the branching fractions of the newly observed excited state. They did not observe significant signals for the 
decay, and reported an upper limit for the ratio of the three body decay to the two body decay mode of 
. In this work, we revisit the newly observed from the molecular perspective where this resonance appears to be a dynamically generated state with spin-parity 
from the coupled channels interactions of the 
and 
in s-wave and 
in d-wave. With the model parameters for the d-wave interaction, we show that the ratio of these decay fractions reported recently by the Belle collaboration can be easily accommodated.
© The Author(s), 2020
