Strong decay of in light cone sum rules* *Hao Sun is supported by the National Natural Science Foundation of China (12075043)

Abstract

In this study, we assign the tetraquark state for the resonance and investigate the mass and decay constant of in the framework of SVZ sum rules through a different calculation technique. Then, we calculate the strong coupling by considering soft-meson approximation techniques within the framework of light cone sum rules, and we use the strong coupling to obtain the width of the decay . Our prediction for the mass agrees with the experimental measurement, and that for the decay width of is within the upper limit.