The primary objective of this study is to investigate hadronic molecules of using a one-boson-exchange model, which incorporates exchanges of vector and pseudoscalar mesons in the -channel, as well as the pion exchange in the -channel. Additionally, careful consideration is given to the three-body effects resulting from the on-shell pion originating from . Then the BESIII data of the process is fitted using the scattering amplitude with or . The analysis reveals that both the and assumptions for scattering provide good descriptions of the data, with similar fit qualities. Notably, the parameters obtained from the best fits indicate the existence of bound states, denoted by and for the and states, respectively. The current experimental data, including the polar angular distribution, cannot distinguish which bound state contributes to the process, or if both are involved. Therefore, we propose further explorations of this process, as well as other processes, in upcoming experiments with many more events to disentangle the different possibilities.

中文翻译：

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J/ψ→ψηη′ 衰变中 JPC=0−− 和 1−−[公式省略]分子的提示


这项研究的主要目的是研究使用单玻色子交换模型的强子分子，该模型结合了 - 通道中矢量和赝标量介子的交换，以及 - 通道中的π介子交换。此外，还仔细考虑了源自 的壳上π介子产生的三体效应。然后使用带有 或 的散射幅度来拟合该过程的 BESIII 数据。分析表明，散射的 和 假设都提供了对数据的良好描述，具有相似的拟合质量。值得注意的是，从最佳拟合获得的参数表明束缚态的存在，分别用 和 表示 和 状态。当前的实验数据，包括极角分布，无法区分哪种束缚态对该过程有贡献，或者是否两者都参与。因此，我们建议在即将进行的更多事件实验中进一步探索这个过程以及其他过程，以理清不同的可能性。