中子电磁结构中的新特征
高能物理 - 实验
2022-10-11 v4
摘要
在此我们呈现中子在质心能量 介于 2.0 与 3.08 GeV 之间的 Born 截面与有效形状因子的新结果，所用数据来自 BESIII 实验收集的 ee 湮灭反应，对应 18 个数据集、积分亮度 647.9 pb。过程 被分为三类独立分析以提高 重建效率。 的截面在 18 个质心能量处测得，其中最佳精度为 GeV 处的 8.1\%。在假设 下提取相应有效形状因子。我们的结果使中子形状因子的统计精度较 FENICE 与 DM2 实验的先前测量提高逾 60 倍，并开启一个新时代：来自湮灭的时间型区域中子形状因子数据已与电子散射实验数据比肩。此外，我们讨论了质子有效形状因子中观测到的振荡行为在中子上的表现。
引用
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journal= {arXiv preprint arXiv:2103.12486},
year = {2022}
}
备注
21 pages, 11 figures, 6 tables