The parity-violating asymmetry $A_{\mathrm{PV}}$ in ${}^{208}\mathrm{Pb}$, recently measured by the PREX-2 Collaboration, is studied using modern relativistic (covariant) and nonrelativistic energy density functionals. We first assess the theoretical uncertainty on $A_{\mathrm{PV}}$ which is intrinsic to the adopted approach. To this end, we use quantified functionals that are able to accommodate our previous knowledge on nuclear observables such as binding energies, charge radii, and the dipole polarizability ${\alpha }_D$ of ${}^{208}\mathrm{Pb}$. We then add the quantified value of $A_{\mathrm{PV}}$ together with ${\alpha }_D$ to our calibration dataset to optimize new functionals. Based on these results, we predict a neutron skin thickness in ${}^{208}\mathrm{Pb}$ $r_{\mathrm{skin}}=0.19\pm 0.02\mathrm{fm}$ and the symmetry-energy slope $L=54\pm 8\mathrm{MeV}$. These values are consistent with other estimates based on astrophysical data and are significantly lower than those recently reported using a particular set of relativistic energy density functionals. We also make a prediction for the $A_{\mathrm{PV}}$ value in ${}^{48}\mathrm{Ca}$ that will be soon available from the CREX measurement.

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Pb208 中违反奇偶校验的不对称信息内容

违反奇偶校验的不对称 ${\mathrm{一个}}_{\mathrm{光伏}}$ 在 ${}^{208}铅$最近由 PREX-2 Collaboration 测量的 ，使用现代相对论（协变）和非相对论能量密度泛函进行研究。我们首先评估理论的不确定性${\mathrm{一个}}_{\mathrm{光伏}}$这是所采用的方法所固有的。为此，我们使用了量化泛函，这些泛函能够适应我们之前对核可观测值的了解，例如结合能、电荷半径和偶极极化率${\alpha }_D$ 的 ${}^{208}铅$. 然后我们加上量化的值${\mathrm{一个}}_{\mathrm{光伏}}$ 和...一起 ${\alpha }_D$到我们的校准数据集以优化新功能。基于这些结果，我们预测了中子皮肤厚度${}^{208}铅$ $r_{\mathrm{皮肤}}=0.19\pm 0.02\mathrm{调频}$ 和对称能量斜率 $升=54\pm 8\mathrm{兆电子伏}$. 这些值与基于天体物理数据的其他估计值一致，并且明显低于最近使用一组特定的相对论能量密度函数报告的值。我们还预测了${\mathrm{一个}}_{\mathrm{光伏}}$ 值 ${}^{48}钙$ 这将很快从 CREX 测量中获得。