论文标题
用核数据和儿童框架中的核数据和天文观测来限制对称能量的密度依赖性
Constraining the density dependence of the symmetry energy with nuclear data and astronomical observations in the KIDS framework
论文作者
论文摘要
儿童核方程（EOS）和能量密度功能（EDF）的儿童框架提供了探索对称性能源（SE）参数（例如J（饱和度处的值），L（斜率），L（斜率），KSYM（曲率），ksym（曲率）以及对彼此独立的以及对有效质量的假设的独立性。在这里，我们研究了EOSS在再现核特性和天文观测中具有不同SE参数的性能，以限制L and Ksym或液滴模型对应物KTAU的努力。假设具有对称物质的标准EOS，我们探索了（J，L，KSYM或KTAU）值的超平面上的几个点。对于每个点，在球形均匀核中的应用中获得相应的EDF参数和配对参数。这是孩子EDF与配对相关性的第一次应用。在逐步的消除和校正过程中，沿SN同位素链沿SN同位素链和天文观测的封闭壳核的性质进行了依次测试。确定了表现最佳参数的少量制度。结果强烈表明KSYM为负，不低于-200mev，KTAU位于-400和-300mev之间，而L则位于40至65mev之间，L <55mev的可能性更高。对称能量参数之间的相关性进行了严格的讨论。据报道，据报道了中子滴注线的位置和选定核的中子皮肤厚度的预测。它们仅受到有效质量值的选择而微弱地影响。滴水线的一部分可以对SE参数敏感。结果强调了KTAU的作用和精确的天文输入。通过与核能量相适应的拟合以及将来的天文学投入更加专业。
The KIDS framework for the nuclear equation of state (EoS) and energy density functional (EDF) offers the possibility to explore symmetry-energy (SE) parameters such as J (value at saturation density), L (slope), Ksym (curvature) and so on independently of each other and of assumptions about the effective mass. Here we examine the performance of EoSs with different SE parameters in reproducing nuclear properties and astronomical observations in an effort to constrain especially L and Ksym or the droplet-model counterpart Ktau. Assuming a standard EoS for symmetric matter, we explore several points on the hyperplane of (J,L,Ksym or Ktau) values. For each point, the corresponding EDF parameters and a pairing parameter are obtained for applications in spherical even-even nuclei. This is the first application of KIDS EDFs with pairing correlations. The EoSs are tested successively on properties of closed-shell nuclei, along the Sn isotopic chain, and on astronomical observations, in a step-by-step process of elimination and correction. A small regime of best-performing parameters is determined. The results strongly suggest that Ksym is negative and no lower than -200MeV, that Ktau lies between roughly -400 and -300MeV and that L lies between 40 and 65MeV with L<55MeV more likely. Correlations between symmetry-energy parameters are critically discussed. Predictions for the position of the neutron drip line and the neutron skin thickness of selected nuclei are reported. They are only weakly affected by the choice of effective mass values. Parts of the drip line can be sensitive to the SE parameters. The results underscore the role of Ktau and of precise astronomical input. Better constraints are possible with precise fits to nuclear energies and, in the future, more-precise input from astronomy.
