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arXiv 2301.07884nucl-thnucl-ex
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原子核共振与中子皮的贝叶斯推断

Bayesian inference of nucleus resonance and neutron skin

Jun Xu

AI总结:

本研究基于Skyrme-Hartree-Fock模型及其扩展,用贝叶斯方法通过原子核共振与中子皮厚度数据约束核物质状态方程,分析参数关联,为相关难题提供折中方案,验证了该方法在多变量多信使分析中的效用。

摘要:

在本会议论文中,我们展示了利用原子核共振和中子皮厚度数据,基于Skyrme-Hartree-Fock模型及其扩展,采用贝叶斯方法约束核物质状态方程(EOS)的若干亮点结果。通常而言,我们分别讨论了在中子皮厚度和同位旋矢量巨偶极共振约束下,饱和密度处对称能的斜率参数与对称能值之间的反相关和正相关关系。我们表明,贝叶斯分析有助于为“PREXII难题”和“软锡难题”找到折中方案。我们进一步阐明了当高阶EOS参数作为独立变量被纳入时,对低阶EOS参数约束及相关关联可能产生的修正。对于给定的模型和参数空间,贝叶斯方法是适用于多信使与多变量分析的良好工具,有助于定量约束模型参数及其相关性。

英文摘要:

In this proceeding, we have presented some highlight results on the constraints of the nuclear matter equation of state (EOS) from the data of nucleus resonance and neutron-skin thickness using the Bayesian approach based on the Skyrme-Hartree-Fock model and its extension. Typically, we have discussed the anti-correlation and positive correlation between the slope parameter and the value of the symmetry energy at the saturation density under the constraint of, respectively, the neutron-skin thickness and the isovector giant dipole resonance. We have shown that the Bayesian analysis can help to find a compromise for the ``PREXII puzzle'' and the ``soft Tin puzzle". We have further illustrated the possible modifications on the constraints of lower-order EOS parameters as well as the relevant correlation when higher-order EOS parameters are incorporated as independent variables. For a given model and parameter space, the Bayesian approach serves as a good analysis tool suitable for multi-messengers versus multi-variables, and is helpful for constraining quantitatively the model parameters as well as their correlations.

机构、总结、中文摘要均由AI分析而来,可能存在错误,请以论文正文为准。

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