论文标题
tetraquarks以开放的魅力青睐
Tetraquarks with open charm favor
论文作者
论文摘要
受外来状态$ x_ {0}（2900）$和$ x_ {1}（2900）$的最新报告的启发协作，我们系统地研究了由Quark Dellocalization Color筛选模型中的Meson-Meson和Diquark-Antidiquark结构组成的$ ud \ bar {s} \ bar {c} $组成的tetraquarks。我们发现$ x_ {0}（2900）$可以解释为分子状态$ \ bar {d^{*}} k^{*} $，带有$ ij^{p} = 00^{+} $。此外，通过频道耦合计算获得了两个绑定状态，Energies $ 2341.2 $ MEV分别为$ IJ^{p} = 00^{+} $和$ 2489.7 $ MEV，分别为$ IJ^{p} = 01^{+} $。我们还将研究扩展到$ uc \ bar {d} \ bar {s} $系统，发现没有任何界限状态，因此在当前计算中$ d_ {s0}（2317）$无法识别为$ dk $分子状态。此外，在$ ud \ bar {s} \ bar {c} $和$ uc \ uc \ bar {d} \ bar {s} $ systems中，都可以在$ ud \ bar {s} \ bar {c} $中两种带有diquark-antidiquark配置的共振状态。所有这些开放式魅力的状态和共鸣都值得在将来的实验中进行搜索。
Inspired by the recent report of the exotic states $X_{0}(2900)$ and $X_{1}(2900)$ with four different quark flavors in the $D^{-}K^{+}$ invariant mass distributions of the decay process $B^{+}\rightarrow D^{+}D^{-}K^{+}$ by the LHCb collaboration, we systematically investigate the tetraquarks composed of $ud\bar{s}\bar{c}$ with meson-meson and diquark-antidiquark structures in the quark delocalization color screening model. We find that the $X_{0}(2900)$ can be interpreted as the molecular state $\bar{D^{*}}K^{*}$ with $IJ^{P}=00^{+}$. Moreover, two bound states are obtained by the channel coupling calculation, with energies $2341.2$ MeV for $IJ^{P}=00^{+}$ and $2489.7$ MeV for $IJ^{P}=01^{+}$, respectively. We also extend our study to the $uc\bar{d}\bar{s}$ systems and find that there is no any bound state, so the $D_{s0}(2317)$ cannot be identified as the $DK$ molecular state in present calculation. Besides, several resonance states with the diquark-antidiquark configuration are possible in both $ud\bar{s}\bar{c}$ and $uc\bar{d}\bar{s}$ systems. All these open charm bound states and resonances are worth searching in the future experiments.
