发表机构
Nishina Center for Accelerator-Based Science, RIKEN; Research Center for Nuclear Physics, The University of Osaka（理化学研究所仁科加速器科学研究中心; 大阪大学核物理研究中心）
机构由 AI 辅助整理，请以论文原文为准。AI 中文总结
本文通过非相对论有效场论，研究库仑加短程相互作用系统中近阈值s波态的复合性，发现弱库仑时保留短程低能普适性导致复合态主导，强库仑时该普适性消失。
AI 中文摘要
我们通过分析复合性，研究了具有库仑加短程相互作用的系统中近阈值s波本征态的普适性质。利用非相对论有效场论，我们推导出近阈值态的复合性与库仑散射长度、库仑有效范围及玻尔半径之间的关系。我们发现，长程库仑相互作用改变了纯短程系统低能普适性所预期的阈值行为。当库仑相互作用相对于短程相互作用较弱时，与短程相互作用相关的低能普适性残余得以保留，导致近阈值本征态以复合态为主。相反，在强库仑区域，这种残余消失。
英文摘要
We study the universal properties of near-threshold $s$-wave eigenstates in systems with Coulomb plus short-range interactions by analyzing their compositeness. Using a nonrelativistic effective field theory, we derive a relation between the compositeness of near-threshold states and the Coulomb scattering length, the Coulomb effective range, and the Bohr radius. We find that the long-range Coulomb interaction modifies the threshold behavior expected from the low-energy universality of purely short-range systems. When the Coulomb interaction is relatively weak compared with the short-range interaction, a remnant of the low-energy universality associated with the short-range interaction survives, leading to composite-dominant near-threshold eigenstates. In contrast, in the strong-Coulomb regime, this remnant disappears.
Comments5 pages, Proceedings of the 18th International Workshop on Meson Physics (MESON 2026), 25-30 June 2026
