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Using of collision data at center-of-mass energies from 4.661 to 4.951 GeV collected by the BESIII detector at the BEPCII collider, we observe the production process for the first time. The significance is , including both the statistical and systematic uncertainties. The Born cross section and the corresponding upper limit at 90% confidence level at each energy point are reported. The line shape of the cross section indicates that the signals may be from the decays of some non-trivial structures.

生成讲解博客的中文版本

生成AI智能校验的中文版本