论文标题
部分可观测时空混沌系统的无模型预测
The interplay of single-particle and collective motions in the low-lying states of $^{21}_Λ$Ne with quadrupole-octupole correlations
论文作者
论文摘要
通过将与基于协变量密度功能理论的发电机坐标方法中的单粒子和四极杆 - octupole集体激发相关的配置，可以扩展低较低的高核状态的超平均场方法。该方法在应用到$^{21}_λ$ ne的低洼状态中进行了证明，其中考虑了$λ$ hyperon的配置，占据了第一个（$λ_s$）和第二（$λ_p$）最低能量状态。结果表明，正值状态由$α+^{12} $ c+$ $ $ a+λ_s$结构主导。相比之下，低洼的负态状态由$α+^{16} $ o+$ o+$λ_s$结构和$α+^{12} $ c+$ c+$ c+$ c+$α+λ_p$结构的强大混合主导。结果，低较低的负态状态远低于没有混合的研究所期望的，并且电力多极过渡强度显着淬灭。
The beyond mean-field approach for low-lying hypernuclear states is extended by mixing the configurations associated with both single-particle and quadrupole-octupole collective excitations within the generator coordinate method based on a covariant density functional theory. The method is demonstrated in the application to the low-lying states of $^{21}_Λ$Ne, where the configurations with the $Λ$ hyperon occupying the first ($Λ_s$) and second ($Λ_p$) lowest-energy states are considered. The results indicate that the positive-parity states are dominated by the $α+^{12}$C+$α+Λ_s$ structure. In contrast, the low-lying negative-parity states are dominated by a strong admixture of $α+^{16}$O+$Λ_s$ structure and $α+^{12}$C+$α+Λ_p$ structure due to the inclusion of octupole correlations. As a result, the low-lying negative-parity states become much lower than what is expected from the previous studies without the mixing, and the electric multipole transition strengths are significantly quenched.
