$\psi$(2S)态作为电子正电子湮灭到$D\bar D$末态中的阈下极点
The $ψ$(2S) state as a subthreshold pole in electron positron annihilation into $D\bar D$ final states
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中文总结 AI 辅助
本研究通过拟合BES 2008和BESIII 2024数据，发现$\psi(2S)$阈下极点显著影响$e^+e^-\to D\bar D$过程，统计显著性达8$\sigma$，且与七个共振态的干涉改变其形状、位置和宽度。
中文摘要 AI 辅助
通过对BES 2008和BESIII 2024合并的$e^+e^-\to D\bar D$截面数据进行拟合，我们发现$\psi(2\mathrm S)$阈下极点显著影响该过程。$\psi(2\mathrm S)$作为阈下极点的统计显著性为8$\sigma$。假设存在该极点和七个共振态的拟合优度极佳，拟合质量为$\chi^2/\mathrm{DOF}=240.4/284$，对应$p$值为97\\%。共振态与阈下极点提供的连续谱之间的干涉改变了它们的形状、位置和宽度。
英文摘要
By performing a fit to the merged BES 2008 and BESIII 2024 $e^+e^-\to D\bar D$ cross-section data, we find that the $ψ(2\mathrm S)$ subthreshold pole influences this process markedly. The statistical significance of the $ψ(2\mathrm S)$ as a subthreshold pole is 8$σ$. A fit assuming it and seven resonances excels with the fit quality characterized by $χ^2/\mathrm{DOF}=240.4/284$, which means a $p$-value of 97\%. The interference of resonances with the continuum provided by the subthreshold pole changes their shapes, positions, and widths.
发表机构
- Institute of Physics and Research Centre for Computational Physics and Data Processing, Silesian University in Opava（奥帕瓦西里西亚大学物理研究所及计算物理与数据处理研究中心）
机构由 AI 辅助整理，请以论文原文为准。
