Explanation of Y(4630) as a hadronic resonant state*

Abstract

Abstract Theorists have given various explanations for the discovery of Y(4630). We find that if Y(4630) is interpreted as the D-wave resonant state of the system, the particle mass, decay width, and all quantum numbers are consistent with experimental observations. We use the Bonn approximation to obtain the interaction potential of the one boson exchange model. Then, we extend the complex scaling method to calculate the bound and resonant states. The results indicate that the system can form not only the bound state of the S wave but also the resonant state of the high angular momentum, and the wave resonant state can explain the structure of Y(4630) very well.