标题： 新观察到的$Z_{cs}^-(3985)$作为$D_s^{(*)-}D^{(*)0}$分子态的解释 显示英文标题

标题： Explanation of the newly obseaved $Z_{cs}^-(3985)$ as a $D_s^{(*)-}D^{(*)0}$ molecular state

摘要： 受BESIII合作组新观察到的$Z_{cs}^-(3985)$的启发，我们在$D_s^{(*)-}D^{(*)0}$分子态的框架下研究该粒子的结构。 首先，我们系统地构建描述底夸克介子相互作用的拉格朗日量，考虑了手征对称性和隐藏局部对称性。 通过从构建的拉格朗日量中获得的有效势能，我们使用在壳近似求解耦合通道Bethe-Salpeter方程。 在第三黎曼面上，得到一个大约$3982.34-i0.53$MeV 的极点位置，这可以与$Z_{cs}^-(3985)$相关联，并解释为$D_s^*\bar{D}^*$的松散束缚态。 显示英文摘要

摘要： Inspired by the newly observed $Z_{cs}^-(3985)$ by BESIII collaboration, we study the structure of this particle in the picture of $D_s^{(*)-}D^{(*)0}$ molecular state. Firstly we systematically construct the Lagrangians which describing the interaction of charmed mesons, taking into account the chiral and hidden local symmetries. With the obtained effective potentials from the Lagrangians constructed, we solve the coupled channel Bethe-Salpeter equation with the on-shell approximation. On the third Reimann sheet, a pole position of around $3982.34-i0.53$ MeV is obtained, which can be associated to the $Z_{cs}^-(3985)$ and explained as a loose bound state of $D_s^*\bar{D}^*$.