Study of the rare decay $J/\psi \to 2\gamma+hadrons$ at the BESIII

Feng Zhang; Jian-Xiong Wang

doi:10.1088/1674-1137/ac7299

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arXiv · 2204.02331

Study of the rare decay $J/\psi \to 2\gamma+hadrons$ at the BESIII

Feng Zhang·Jian-Xiong Wang

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Abstract

Two-photon radiative decay process $J/\psi \to 2\gamma+hadrons$ is studied, and the main contribution processes $J/\psi \to 2\gamma + g g g$ and $J/\psi \to 2\gamma + q \bar{q}$ are calculated. With the specific condition at the BESIII, this rare decay process and the main background process $e^{+} e^{-} \to \gamma \gamma + hadrons (q \bar{q})$ are investigated. The results show that the ratio of signal to background can reach 1.24 with the optimized selection criteria at the BESIII. In addition, a few distributions of the signal and background are presented. All the results show that the signal is large enough to be measured in the experiment.

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Feng Zhang, Jian-Xiong Wang. 2022-04-05. Study of the rare decay $J/\psi \to 2\gamma+hadrons$ at the BESIII. https://doi.org/10.1088/1674-1137%2Fac7299

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