标题： $Z_{cs}(3985)$可以是$\bar{D}_s^*D$和$\bar{D}_sD^*$的分子态吗？ 显示英文标题

标题： Can $Z_{cs}(3985)$ be a molecular state of $\bar{D}_s^*D$ and $\bar{D}_sD^*$ ?

摘要： 我们研究了BESIII合作组最近在单玻色子交换模型中观察到的$Z_{cs}(3985)$状态，假设它是一个$\bar{D}_s^{(*)}D^{(*)}$分子，具有夸克内容$c\bar{c}s\bar{q}$，包括$q = u$，$d$。 结果显示，单玻色子交换势太弱，无法动态生成$\bar{D}_s D$、$\bar{D}^*_s D$和$\bar{D}_sD^*$状态，而对于$\bar{D}^*_s D^*$的情况，非常松散结合的状态可能是存在的，结合能的量级为几 MeV。 我们得出结论，如果进一步实验确认了观测到的$Z_{cs}(3985)$状态，则它不能是$\bar{D}_s D^*$和$\bar{D}_s^*D$的纯强子分子态，可能包含大量紧凑性质的成分。 显示英文摘要

摘要： We study the $Z_{cs}(3985)$ state recently observed by the BESIII Collaboration in the one-boson-exchange model, assuming that it is a $\bar{D}_s^{(*)}D^{(*)}$ molecule, which has the quark content $c\bar{c}s\bar{q}$ with $q = u$, $d$. It is shown that the one-boson-exchange potential is too weak to generate dynamcally $\bar{D}_s D$, $\bar{D}^*_s D$, and $\bar{D}_sD^*$ states, while for the case of $\bar{D}^*_s D^*$, very loosely bound states are likely, with binding energies of the order of several MeV. We conclude that, the observed $Z_{cs}(3985)$ state, if confirmed by further experiments, cannot be a pure hadronic molecular state of $\bar{D}_s D^*$ and $\bar{D}_s^*D$ and could consist of large components of compact nature.