发表机构
Washington University; Haverford College（华盛顿大学; 哈弗福德学院）
机构由 AI 辅助整理，请以论文原文为准。AI 中文总结
该研究扩展了色散光学模型，通过放弃自能的能量与几何因子化处理，成功解释了A-1系统谱函数峰随动量增大向高激发能移动的特征，改进了48Ca的DOM结果，明确小中子皮可对应质子高动量尾大于中子的情况。
AI 中文摘要
本文在色散光学模型（DOM）框架下，引入了对原子核内高动量分量的改进处理。目前，随着动量增大，A-1系统中谱函数的峰出现在更高激发能这一成熟特征，尚未在DOM中得到成功解释。为实现该特征，需放弃DOM自能的能量依赖性与几何形状的因子化，因此费米能以下的体吸收由更大缺失能量下减小的半径表示，这意味着需要对色散关系进行数值处理。该方法也改进了之前48Ca的DOM结果，表明小中子皮仍可伴随质子拥有比中子更大的高动量尾。
英文摘要
An improved treatment of high-momentum components in nuclei is introduced in the framework of the dispersive optical model (DOM). The well-established feature that the peak of the spectral function appears at higher excitation energy in the $A$-1 system with increasing momentum has so far not been successfully accounted for in the DOM. To achieve this feature, it is necessary to abandon the factorization of energy dependence and geometry of the DOM self-energy. The volume absorption below the Fermi energy has thus been represented by a decreasing radius at larger missing energy implying that a numerical treatment of the dispersion relations is necessitated. Earlier DOM results for ${}^{48}$Ca are also improved with this approach, demonstrating that a small neutron skin can still be accompanied by protons having a larger high-momentum tail than neutrons.
Comments18 Pages, 24 figures. The supplemental material is now added as Appendices
