Study of the radiative decay $J/\psi\rightarrow\eta_{c}+\gamma$ in light cone sum rules

At present, there are many experimental and theoretical results for $J/\psi\rightarrow\eta_{c}+\gamma$ process, while the results are inconsistent based on different methods and considerations. In this paper, the light cone sum rule method is used in studying the radiative decay $J/\psi\rightarrow\eta_{c}+\gamma$. We give the transition form factor of this process based on the leading twist distribution amplitude of $\eta_{c}$ meson, with this form factor further obtain the decay width. Our result is compatible with recent experimental date within errors, and it is consistent with the results of previous sum rule method. A comparison of our result with others' about the decay width is also presented.