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arXiv · 1912.00836

Study of the radiative decay $J/ψ\rightarrowη_{c}+γ$ in light cone sum rules

Song-Pei Guo·Yan-Jun Sun·Wei Hong·Qi Huang·Guo-Hua Zhao
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Abstract

At present, there are many experimental and theoretical results for $J/ψ\rightarrowη_{c}+γ$ process, while the results are inconsistent based on different methods and considerations. In this paper, the light cone sum rules method is used in studying the radiative decay $J/ψ\rightarrowη_{c}+γ$. We give the transition form factor of this process based on the leading twist distribution amplitude of $η_{c}$ meson, with this form factor further obtain the decay width. Our result is consistent with those of other sum rules. A comparison of our result with others' about the decay width is also presented.

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Song-Pei Guo, Yan-Jun Sun, Wei Hong, Qi Huang, Guo-Hua Zhao. 2019-12-11. Study of the radiative decay $J/ψ\rightarrowη_{c}+γ$ in light cone sum rules. https://doi.org/10.1016/j.nuclphysb.2020.115053

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