标题： 带电类 charm 介子态$Z_c(3900)$及其奇异伙伴$Z_{cs}(3982)$的性质 显示英文标题

标题： The nature of charged charmonium-like states $Z_c(3900)$ and its strange partner $Z_{cs}(3982)$

摘要： BESIII在$D_s^{*-}D^0$和$D_s^{-}D^{*0}$通道中观察到的$Z_{cs}(3985)$为在重夸克自旋对称性的基础上，对$Z_c(3900)$和$Z_c(4020)$以及它们的奇异伙伴$Z_{cs}(3985)$和$Z_{cs}(4120)$的统一理解提供了重要的动态信息。在SU(3)味对称性中的整体短程接触势下，我们表明可以从实验数据中提取极点结构。 同时，我们展示了$S$波开放阈值在$e^+e^-$粒子湮灭中的关键作用，这些湮灭与这些$Z$状态的产生相关，在强子分子图象中。还获得了它们标量重夸克自旋伙伴$W_{c0,1,2}$和$W_{cs0,1,2}$的含义。 显示英文摘要

摘要： The observation of $Z_{cs}(3985)$ by BESIII in the $D_s^{*-}D^0$ and $D_s^{-}D^{*0}$ channel adds important dynamic information for a coherent understanding of both $Z_c(3900)$ and $Z_c(4020)$, as well as their strange partners $Z_{cs}(3985)$ and $Z_{cs}(4120)$, on the basis of heavy quark spin symmetry. With an overall short-ranged contact potential in SU(3) flavor symmetry we show that the pole structures can be extracted from the experimental data. Meanwhile, we show the key role played by the $S$-wave open thresholds in $e^+e^-$ annihilations which are correlated with the production of these $Z$ states in a hadronic molecule picture. Implications of their scalar heavy quark spin partners $W_{c0,1,2}$ and $W_{cs0,1,2}$ are also gained.