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arXiv 1004.0823nucl-thhep-ph
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原子核反核子谱中的自旋和赝自旋对称性

Spin and pseudospin symmetries in the antinucleon spectrum of nuclei

R. Lisboa, M. Malheiro, P. Alberto, M. Fiolhais, A. S. de Castro

摘要:

本文用相对论平均场论研究核子和反核子能谱中的自旋和赝自旋对称性。我们观察到,对于核子和反核子,自旋对称性是微扰性质的,对于反核子,它几乎是物理区域内的精确对称。在赝自旋对称性的情况下,情况正好相反,这种情况在核子中比在反核子中实现得更好,但它是动力学性质的,不能用微扰的方式来看待核子和反核子。这是通过计算自旋轨道和赝自旋轨道耦合选定的自旋和赝自旋合作伙伴在这两个光谱。

英文摘要:

Spin and pseudospin symmetries in the spectra of nucleons and antinucleons are studied in a relativistic mean-field theory with scalar and vector Woods-Saxon potentials, in which the strength of the latter is allowed to change. We observe that, for nucleons and antinucleons, the spin symmetry is of perturbative nature and it is almost an exact symmetry in the physical region for antinucleons. The opposite situation is found in the pseudospin symmetry case, which is better realized for nucleons than for antinucleons, but is of dynamical nature and cannot be viewed in a perturbative way both for nucleons and antinucleons. This is shown by computing the spin-orbit and pseudospin-orbit couplings for selected spin and pseudospin partners in both spectra.

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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