Hadrons in nuclei and chiral symmetry in quantum chromodynamics

从核介质中手征对称性部分恢复的角度，研究了QCD真空中手征对称性的自发破缺现象。为了研究部分修复，发展了一种媒质手性效应理论。超线性密度近似计算了核介质中的夸克凝聚态和介子性质。从手征对称性部分恢复的观点讨论了核介质中的η介子。结果表明，η介子在原子核中具有很强的引力势能。

The phenomenon of the spontaneous breakdown of chiral symmetry in the QCD vacuum was studied in the aspect of partial restoration of chiral symmetry in nuclear medium. To study the partial restoration, an in-medium chiral effective theory wasdeveloped. The quark condensate and the pion properties in the nuclear medium werecalculated beyond the linear density approximation. The η’ meson in nuclear medium was discussed in the viewpoint of partial restoration of chiral symmetry. It was shown that the η’ meson could have a strong attractive potential in nucleus.