https://doi.org/10.1140/epjc/s10052-018-5580-z
Regular Article - Theoretical Physics
as a virtual state from 
interaction
1
Department of Physics and Institute of Theoretical Physics, Nanjing Normal University, Nanjing, 210097, China
2
School of Physics, Southeast University, Nanjing, 210094, China
* e-mail: junhe@njnu.edu.cn
Received:
23
December
2017
Accepted:
22
January
2018
Published online:
1
February
2018
In this work, we study the 
and 
invariant mass spectra of the Y(4260) decay to find out the origin of the 
and 
structures. The 
interaction is studied in a coupled-channel quasipotential Bethe–Saltpeter equation approach, and embedded to the Y(4260) decay process to reproduce both 
and 
invariant mass spectra observed at BESIII simultaneously. It is found out that a virtual state at energy about 3870 MeV is produced from the interaction when both invariant mass spectra are comparable with the experiment. The results support that both and have the same origin, that is, a virtual state from 
interaction, in which the 
interaction is more important and the coupling between and channels plays a minor role.
© The Author(s), 2018
