论文标题
$ x_0（2900）$和$ x_1（2900）$：hadronic分子或紧凑的四夸克
$X_0(2900)$ and $X_1(2900)$: hadronic molecules or compact tetraquarks
论文作者
论文摘要
最近，LHCB合作报告了他们对前两个完全开放风味的Tetraquark指出的观察，即$ x_0（2900）$ $ j^p = 0^+$和$ x_1（2900）$ j^p = 1^ - $。我们使用QCD和规则的方法研究了他们的可能解释，特别注意该实验的有趣特征，即较高的共振$ x_1（2900）$的宽度明显大于下一个$ x_0（2900）$。 Our results suggest that the $X_0(2900)$ can be interpreted as the $S$-wave $D^{*-}K^{*+}$ molecule state of $J^P = 0^+$, and the $X_1(2900)$ can be interpreted as the $P$-wave $\bar c \bar s u d$ compact tetraquark state of $J^P = 1^-$.还给出了其最低伙伴的大规模预测。
Very recently the LHCb Collaboration reported their observation of the first two fully open-flavor tetraquark states, the $X_0(2900)$ of $J^P = 0^+$ and the $X_1(2900)$ of $J^P = 1^-$. We study their possible interpretations using the method of QCD sum rules, paying special attention to an interesting feature of this experiment that the higher resonance $X_1(2900)$ has a width significantly larger than the lower one $X_0(2900)$. Our results suggest that the $X_0(2900)$ can be interpreted as the $S$-wave $D^{*-}K^{*+}$ molecule state of $J^P = 0^+$, and the $X_1(2900)$ can be interpreted as the $P$-wave $\bar c \bar s u d$ compact tetraquark state of $J^P = 1^-$. Mass predictions of their bottom partners are also given.
