标题： 从裸两核子相互作用到相对论框架下的核物质和有限核 显示英文标题

标题： From bare two-nucleon interaction to nuclear matter and finite nuclei in a relativistic framework

摘要： 理解核力、无限核物质和有限核在统一框架内的问题，几十年来一直是核物理中的核心挑战。 虽然大多数\textit{从头计算}研究采用非相对论的薛定谔方程框架，但本文提供了一个相对论的观点。 使用一级近似（LO）的相对论手征相互作用，我们通过汤普森方程描述两核子散射，通过相对论布吕克纳-哈特里-福克理论描述对称核物质和中等质量核（Ca、Ni、Zr、Sn）。 分析了来自调节器截断和相互作用参数的系统不确定性。 再现了核物质的经验饱和区域，并且中等质量核的结合能和电荷半径与实验数据合理吻合，显著改进了“Coester线”。 这些结果表明，采用仅包含四个低能常数且没有三核子力的相对论方法可以捕捉最重要的动力学，并为解决核\textit{从头计算}研究中的长期挑战提供了补充途径。 显示英文摘要

摘要： Understanding nuclear forces, infinite nuclear matter, and finite nuclei within a unified framework has remained a central challenge in nuclear physics for decades. While most \textit{ab initio} studies employ nonrelativistic Schr\"odinger-equation frameworks, this work offers a relativistic perspective. Using a leading-order (LO) relativistic chiral interaction, we describe two-nucleon scattering via the Thompson equation, symmetric nuclear matter, and medium-mass nuclei (Ca, Ni, Zr, Sn) via the relativistic Brueckner-Hartree-Fock theory. Systematic uncertainties from regulator cutoffs and interaction parameters are analyzed. The empirical saturation region of nuclear matter is reproduced, and the binding energies and charge radii of medium-mass nuclei agree reasonably well with experimental data, significantly improving the ``Coester line". These results highlight that the relativistic approach, employing a leading-order chiral force with only four low-energy constants and no three-nucleon forces, can capture the most important dynamics and offer a complementary pathway to address longstanding challenges in nuclear \textit{ab initio} studies.