标题： 重夸克onia在瞬时Bethe-Salpeter模型中 显示英文标题

标题： Heavy Quarkonia in the Instantaneous Bethe-Salpeter Model

摘要： 重夸克onia（Charmonium \(c\bar{c}\) 和 Bottomonium \(b\bar{b}\)）在瞬时BS方程（Salpeter方程）的框架下进行研究。 我们通过线性上升的标量或矢量相互作用核来替代地参数化禁闭，并考虑瞬时近似下的单胶子交换（OGE）相互作用。 计算了质量谱以及轻子、双光子、E1和M1衰变宽度。 我们的结果表明，对于禁闭核的两种自旋结构都可以得到对实验数据的合理描述。 相对论处理相比于非相对论结果，对 \(\eta_c\) 的双光子宽度有所改进，对E1跃迁宽度也有一定程度的改善。 然而，特征偏差表明，在相对论框架下，禁闭不能通过势来充分描述。 显示英文摘要

摘要： The heavy quarkonia (Charmonium \(c\bar{c}\) and Bottomonium \(b\bar{b}\)) are investigated in the framework of the instantaneous BS-equation (Salpeter equation). We parametrize confinement alternatively by a linearly rising scalar or a vector interaction kernel and take into account the one-gluon-exchange (OGE) interaction in the instantaneous approximation. Mass spectra as well as leptonic, two-photon, E1 and M1 decay widths are calculated. Our results show that a reasonable description of the experimental data can be obtained with both spin structures for the confining kernel. The relativistic treatment leads to an improved description compared to nonrelativistic results for the two-photon width of the \(\eta_c\) and to some extent for the E1-transition widths. However, characteristic deviations indicate that within a relativistic framework confinement is not described adequately by a potential.