包含$p$波散射贡献的李杨能量密度泛函
Lee-Yang-inspired energy-density functional including contributions from $p$-wave scattering
摘要：
[M. Grasso，D. Lacroix和C. J. Yang，Phys. Rev. C \textbf{95}，054327（2017）]属于受有效场论（EFT）启发并受\textit{ab--initio}伪数据约束的能量密度泛函（EDF）家族。我们在这里提出了一个扩展的EDF，这也占了第一个$p$波长期出现在低密度膨胀，它来自。它示出，这种丰富的的ananonymous上的功能是基于导致显着改善的中子系统的描述，特别是在制度，除了伪数据集用于调整参数。作为一个示例性的应用，考虑了中子星的质量-半径关系。与其初始版本相比，新的功能预测值与最近的观测定性一致。
英文摘要：
The ELYO functional proposed in [M. Grasso, D. Lacroix, and C. J. Yang, Phys. Rev. C \textbf{95}, 054327 (2017)] belongs to the family of energy-density functionals (EDFs) inspired by effective-field theories (EFTs) and constrained by \textit{ab--initio} pseudo-data. We present here an extension of this EDF which also accounts for the first $p$-wave term appearing in the low-density expansion from which it derives. It is shown that this enrichment of the ansatz on which the functional is based leads to a significant improvement of the description of neutronic systems, especially in regimes besides the pseudo--data set employed to adjust the parameters. As an illustrative application, the mass-radius relation of neutron stars is considered. In contrast to its initial version, the new functional predicts values which are qualitatively consistent with recent observations.
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