论文标题
$ x_0（2866）$作为$ d^*\ bar {k}^*$分子状态
$X_0(2866)$ as a $D^*\bar{K}^*$ molecular state
论文作者
论文摘要
最近，LHCB合作报告了发现两个开放式魅力Tetraquark States，$ x_ {0}（2866）$和$ x_ {1}（2904）$。在目前的工作中，我们研究了$ d^{（\ ast）} $和$ \ bar {k}^{（\ ast）} $在一验交换模型中的相互作用，并证明$ x_ {0}（2866）$可以理解为$ d^{\ ast} {\ ast} { $ i（j^{p}）= 0（0^{+}）$，或者至少具有大分子组件。另一方面，$ x_ {1}（2904）$不能解释为分子状态。受到$ x_0（2866）$的发现的启发，以及$ d^*\ bar {k}^*$相互作用足以生成绑定状态的事实，我们还讨论了其他开放式魅力分子的存在。在梅森 - 梅森行业中，$ dd^{\ ast} $的质量阈值附近的两个分子和$ d^{\ ast} d^{\ ast} $，带有$ i（j^{p}）= 0（1^{+}）$ $ \ bar {b} \ bar {b}^{\ ast} $和$ \ bar {b}^{\ ast} \ bar {b}^{\ ast {\ ast} $对应物也可以预测。在梅森 - 巴里昂（Meson-Baryon）行业中，有7个开放式魅力分子，$ i = 1/2 $接近$ d^{（\ ast）}σ_{c}^{（\ ast）} $的质量阈值，自然而然地出现，按照沉重的夸克旋转对称。
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.
