arXivDaily arXiv每日学术速递 周一至周五更新
北美退伍军人节(Veterans Day),12 日无更新
arXiv 2008.07389hep-phhep-ex
收藏

作为$D^*\bar{K}^*$分子状态的$X_0(2866)$

$X_0(2866)$ as a $D^*\bar{K}^*$ molecular state

Ming-Zhu Liu, Ju-Jun Xie, Li-Sheng Geng

摘要:

最近LHCb合作组报告发现了两个开粲四夸克态,$X_{0}(2866)$和$X_{1}(2904)$。本文在单玻色子交换模型下研究了$D^{(\ast)}$和$\bar{K}^{(\ast)}$的相互作用,证明了$X_{0}(2866)$可以被理解为一个含有$I(J^{P})=0(0^{+})$的$D^{\ast}\bar{K}^{\ast}$分子,或者至少它有一个大分子组分.另一方面,$X_{1}(2904)$不能被解释为分子状态。受$X_0(2866)$发现的启发,以及PDMATHAMT相互作用强到足以产生束缚态的事实,我们还讨论了其他开放魅力分子的可能存在。在介子-介子区,得到了两个质量阈值附近的分子$DD^{\ast}$和$I(J^{P})=0(1^{+})$,并利用重夸克味对称性预言了它们的对应分子$\bar{B}\bar{B}^{\ast}$和$\bar{B}^{\ast}\bar{B}^{\ast}$.在介子-重子区,7个$I=1/2$接近$D^{(\ast)}Σ_{c}^{(\ast)}$质量阈值的开粲分子自然出现,这是由重夸克自旋对称性决定的。

英文摘要:

Very recently the LHCb Collaboration reported the discovery of two open charm tetraquark states, $X_{0}(2866)$ and $X_{1}(2904)$. In the present work, we study the $D^{(\ast)}$ and $\bar{K}^{(\ast)}$ interaction in the one-boson exchange model and show that the $X_{0}(2866)$ can be understood as a $D^{\ast}\bar{K}^{\ast}$ molecule with $I(J^{P})=0(0^{+})$, or at least it has a large molecular component. On the other hand, the $X_{1}(2904)$ can not be interpreted as a molecular state. Inspired by the discovery of the $X_0(2866)$ and the fact that the $D^*\bar{K}^*$ interaction is strong enough to generate a bound state, we also discuss likely existence of other open charm molecules. In the meson-meson sector, two molecules near the mass thresholds of $DD^{\ast}$ and $D^{\ast}D^{\ast}$ with $I(J^{P})=0(1^{+})$ are obtained, and using the heavy quark flavor symmetry their $\bar{B}\bar{B}^{\ast}$ and $\bar{B}^{\ast}\bar{B}^{\ast}$ counterparts are also predicted. In the meson-baryon sector, 7 open charm molecules with $I=1/2$ near the mass thresholds of $D^{(\ast)}Σ_{c}^{(\ast)}$ naturally appear, as dictated by the heavy quark spin symmetry.

机构、总结、中文摘要均由AI分析而来,可能存在错误,请以论文正文为准。

↑