近期地面实验与天体物理观测约束模型中中子星的反中微子不透明度
Antineutrino Opacity in Neutron Stars in the Models Constrained by Recent Terrestrial Experiments and Astrophysical Observations
AI总结：
本文利用受 PREX II、地面实验及天体观测约束的 E-RMF 与 KIDS-EDF 模型，基于线性响应理论计算中子星物质中反中微子微分截面和平均自由程，并比较不同模型预测。
摘要：
在本文中，我们研究了零温度下中性流（NC）反中微子与中子星（NS）物质组分的散射。中子星标准物质的建模是在扩展相对论平均场（E-RMF）模型和非相对论 Korea-IBS-Daegu-SKKU 能量密度泛函（KIDS-EDF）模型这两个框架内构建的。在 E-RMF 模型中，我们采用了新参数 G3(M)，该参数受到近期 PREX II 实验对 ^208Pb 中子分布测量结果的约束；而 KIDS-EDF 模型则受到地面实验、引力波信号和天体物理观测的约束。随后，利用这些既符合实际又受到良好约束的物质模型，我们采用线性响应理论计算了反中微子与中子星物质组分相互作用的反中微子微分截面（ADCS）和反中微子平均自由程（AMFP）。结果发现，与 SLy4 模型以及采用 G3(M) 参数的 E-RMF 模型相比，KIDS0 和 KIDSA 模型给出的 AMFP 更小。采用 SLy4 参数集的 Skyrme 模型的 AMFP 结果被发现与采用 G3(M) 参数的 E-RMF 模型的预测几乎相似。文中还给出了 G3(M) 模型中每种核子对总 AMFP 的贡献。
英文摘要：
In the present paper, we investigate neutral current (NC) antineutrino scattering with the constituents of neutron star (NS) matter at zero temperature. The modeling of standard matter in NS is constructed within the framework of both extended relativistic mean-field (E-RMF) and nonrelativistic Korea-IBS-Daegu-SKKU energy density functional (KIDS-EDF) models. In the E-RMF model, we use a new parameter, G3(M), which was constrained by the recent PREX II experiment measurement of neutron distribution in $^{208}\rm{Pb}$, while the KIDS-EDF models are constrained by terrestrial experiments, gravitational-wave signals, and astrophysical observations. Using both realistic and well-constrained matter models, we then calculate the antineutrino differential cross-section (ADCS) and antineutrino mean free path (AMFP) for the interaction between antineutrinos and neutron star (NS) matter constituents using linear response theory. It is found that the AMFP for the KIDS0 and KIDSA models are smaller compared to the SLy4 model and the E-RMF model with the G3(M) parameter. The AMFP result of the Skyrme model with the SLy4 parameter set is found to have a prediction almost similar to that of the E-RMF model with the G3(M) parameter. Contributions of each nucleon to the total AMFP are also presented for the G3(M) model.
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