揭示“镜像核”$^3$H 与 $^3$He 的短程结构
核实验
2022-10-11 v1 高能物理 - 实验
核理论
摘要
当质子与中子（核子）束缚于原子核内时，它们彼此足够接近，从而能感受到核子-核子相互作用中强而短程部分的显著吸引或排斥。这些强相互作用导致核子间的硬碰撞，产生被称为短程关联（SRCs）的高能核子对。SRCs 是核结构中重要但相对未被充分理解的部分，因此描绘这些虚激发的强度与同位旋结构（中子-质子对 vs 质子-质子对）是为一系列核物理、粒子物理与天体物理测量建模的关键输入。迄今的测量使用双核子敲出或“三重符合”反应，通过从 SRC 中敲出一个质子并探测其伴生核子（质子或中子）来测量 np- 与 pp-SRC 的相对贡献。这些测量表明 SRCs 几乎全为 np 对，但统计有限且需要依赖模型的大终态相互作用（FSI）修正。我们报道了首项利用镜像核 H 与 He 的inclusive散射来提取 A=3 系统中 SRC 的 np/pp 比的测量。我们获得的 np/pp SRC 比的测量精度比较早的实验提高了一个数量级，并发现与重核中观测到的近乎完全的 np 主导有显著偏离。该结果意味着 He 与 H 的高动量波函数存在出乎意料的结构。理解这些结果将增进我们对 N-N 相互作用短程部分的认识。
引用
@article{arxiv.2210.04189,
title = {Revealing the short-range structure of the "mirror nuclei" $^3$H and $^3$He},
author = {S. Li and R. Cruz-Torres and N. Santiesteban and Z. H. Ye and D. Abrams and S. Alsalmi and D. Androic and K. Aniol and J. Arrington and T. Averett and C. Ayerbe Gayoso and J. Bane and S. Barcus and J. Barrow and A. Beck and V. Bellini and H. Bhatt and D. Bhetuwal and D. Biswas and D. Bulumulla and A. Camsonne and J. Castellanos and J. Chen and J-P. Chen and D. Chrisman and M. E. Christy and C. Clarke and S. Covrig and K. Craycraft and D. Day and D. Dutta and E. Fuchey and C. Gal and F. Garibaldi and T. N. Gautam and T. Gogami and J. Gomez and P. Guèye and A. Habarakada and T. J. Hague and J. O. Hansen and F. Hauenstein and W. Henry and D. W. Higinbotham and R. J. Holt and C. Hyde and T. Itabashi and M. Kaneta and A. Karki and A. T. Katramatou and C. E. Keppel and M. Khachatryan and V. Khachatryan and P. M. King and I. Korover and L. Kurbany and T. Kutz and N. Lashley-Colthirst and W. B. Li and H. Liu and N. Liyanage and E. Long and J. Mammei and P. Markowitz and R. E. McClellan and F. Meddi and D. Meekins and S. Mey-Tal Beck and R. Michaels and M. Mihovilovič and A. Moyer and S. Nagao and V. Nelyubin and D. Nguyen and M. Nycz and M. Olson and L. Ou and V. Owen and C. Palatchi and B. Pandey and A. Papadopoulou and S. Park and S. Paul and T. Petkovic and R. Pomatsalyuk and S. Premathilake and V. Punjabi and R. D. Ransome and P. E. Reimer and J. Reinhold and S. Riordan and J. Roche and V. M. Rodriguez and A. Schmidt and B. Schmookler and E. P. Segarra and A. Shahinyan and K. Slifer and P. Solvignon and S. Širca and T. Su and R. Suleiman and H. Szumila-Vance and L. Tang and Y. Tian and W. Tireman and F. Tortorici and Y. Toyama and K. Uehara and G. M. Urciuoli and D. Votaw and J. Williamson and B. Wojtsekhowski and S. Wood and J. Zhang and X. Zheng},
journal= {arXiv preprint arXiv:2210.04189},
year = {2022}
}