Spin and pseudospin symmetries in the single-Lambda spectrum
Spin and pseudospin symmetries in the single-Lambda spectrum
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单 Lambda 谱中的自旋和赝自旋对称性
DOI：
10.1103/physrevc.96.044312
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发表时间：
2017
影响因子：
3.1
通讯作者：
Sun TT
中科院分区：
文献类型：
--
作者：
Sun Ting-Ting;Lu Wan-Li;Sun Ting-Ting;Lu Wan-Li;Zhang Shi-Sheng;Sun TT;Sun TT
我们在相对论平均场理论的框架内探索单谱中的自旋和赝自旋对称性。我们发现单谱的自旋对称性保持不变，这与小自旋轨道分裂的实验结果一致，而近似的赝自旋对称性与核子的近似赝自旋对称性非常相似。更有趣的是，张量耦合对这些对称性具有相反的影响，这使得自旋对称性更好，但赝自旋对称性更差。这可以通过张量势的负值来理解，它降低了自旋轨道势，同时增加了赝自旋轨道势。
We explore spin and pseudospin symmetries in the single-spectrum within the framework of relativistic mean-field theory. We find that the spin symmetry of the single-spectrum maintains, which is consistent with experimental results of small spin-orbit splitting, whereas the approximate pseudospin symmetry is quite similar to that of nucleons. More interestingly, thetensor coupling has opposite effects on these symmetries which makes the spin symmetry better but the pseudospin symmetry worse. This can be understood by the negative value of thetensor potential, which reduces the spin-orbit potential while increasing the pseudospin-orbit potential.