近日，北京大学的裴俊琛及其研究团队取得一项新进展。经过不懈努力，他们揭示中子皮测量对Skyrme状态方程的影响。相关研究成果已于2024年6月15日在国际知名学术期刊《中国物理C》上发表。

在本研究中，研究人员通过包括PREX-II和CREX实验的中子皮厚度，以一致的方式对扩展的Skyrme力进行了优化，并研究了GW170817事件中的核状态方程和中子星。通过改变中子皮的拟合权值，得到了几个新的Skyrme参数化。

这项研究结果表明，在同时描述中子皮、有限核的其他性质和中子星观测的拟合过程中存在竞争。此外，他们还讨论了解决中子皮问题的前景。

据悉，最近通过电子散射宇称破缺对²⁰⁸Pb中子皮的测量，发现了异常厚的中子皮，这对核状态方程和中子星观测具有重要意义。

附：英文原文

Title: Implications of neutron skin measurements on Skyrme equations of state

Author: Da Wei Guan, Jun Chen Pei, Chong Ji Jiang

Issue&Volume: 2024-06-15

Abstract: The recent measurements of neutron skins via parity violation in electron scattering have extracted an abnormally thick neutron skin for ²⁰⁸Pb, which has significant consequences in nuclear equation of state (EoS) and neutron star observations. In this study, we perform optimizations of extended Skyrme forces in a consistent manner by including neutron skin thicknesses from PREX-II and CREX experiments and investigate nuclear EoSs and neutron stars in the GW170817 event. By varying the fitting weights of neutron skins, several new Skyrme parameterizations are obtained. Our results show the competition in the fitting procedure to simultaneously describe neutron skins, other properties of finite nuclei, and neutron star observations. The prospects of resolving neutron skin issues are also discussed.

DOI: 10.1088/1674-1137/ad3814

Source: http://hepnp.ihep.ac.cn/article/doi/10.1088/1674-1137/ad3814