中文

$Z_{cs}(3985)$ 能否作为 $\bar{D}_s^*D$ 与 $\bar{D}_sD^*$ 的分子态?

高能物理 - 唯象学 2020-11-19 v2

摘要

我们在单玻色子交换模型中研究了 BESIII 合作组近期观测到的 Zcs(3985)Z_{cs}(3985) 态,假设其为 Dˉs()D()\bar{D}_s^{(*)}D^{(*)} 分子,具有夸克组分 ccˉsqˉc\bar{c}s\bar{q},其中 q=uq = udd。研究表明,单玻色子交换势太弱,无法动力学地生成 DˉsD\bar{D}_s DDˉsD\bar{D}^*_s DDˉsD\bar{D}_sD^* 态;而对于 DˉsD\bar{D}^*_s D^* 情形,则很可能形成极松散的束缚态,其结合能约为几 MeV 量级。我们得出结论:若观测到的 Zcs(3985)Z_{cs}(3985) 态被进一步实验确认,它不可能是一个纯的 DˉsD\bar{D}_s D^*DˉsD\bar{D}_s^*D 强子分子态,而可能含有很大比例的紧致组分。

关键词

引用

@article{arxiv.2011.08720,
  title  = {Can $Z_{cs}(3985)$ be a molecular state of $\bar{D}_s^*D$ and $\bar{D}_sD^*$ ?},
  author = {Ming-Zhu Liu and Jun-Xu Lu and Tian-Wei Wu and Ju-Jun Xie and Li-Sheng Geng},
  journal= {arXiv preprint arXiv:2011.08720},
  year   = {2020}
}

备注

During the numerical calculation, an unfortunate coding error occurred which mis-identified the exchange of $K$ and $K^*$ mesons, which could not happen. As a result, the OBE potential could not provide a relevant binding mechanism for the $\bar{D}_s^{(*)}D^{(*)}$ systems studied in the present work