论文标题
由于三角奇异机制在光轴向矢量介孔耦合到$ k^*\ bar {k}+c.c. $中的顶点校正
The vertex corrections due to the triangle singularity mechanism in the light axial vector meson couplings to $K^*\bar{K}+c.c.$
论文作者
论文摘要
光轴向矢量介子可以将$ k^*\ bar {k}+c.c. $在树级别的$ s $ wave中进行。由于接近阈值$ s $ wave的交互，耦合可能会受到最终状态互动的影响。 $ k^*\ bar {k}+c.c. $之间的Pion交换可以通过三角图（TS）的运动学（TS）的三角图。该机制将引入能量依赖性，并向顶点耦合引入$ d $波振幅。因此，必须研究$ k^*\ bar {k}+c.c. $阈值所起的作用，以便更好地了解光轴向向量频谱。
The light axial vector mesons can couple to $K^*\bar{K}+c.c.$ in an $S$ wave at the tree level. Due to the near-threshold $S$-wave interactions the couplings can be affected by the final state interactions. It is of peculiar interest that the pion exchange between $K^*\bar{K}+c.c.$ can go through a triangle diagram which is within the kinematics of the triangle singularity (TS). This mechanism will introduce energy dependence and a $D$-wave amplitude to the vertex couplings. Hence, it should be necessary to investigate the role played by the $K^*\bar{K}+c.c.$ threshold in order to have a better understanding of the light axial vector spectrum.
