论文标题
Tetraquark状态的调查$ qq \ bar {q} \ bar {q} $在改进的铬磁相互作用模型中
Investigation of the tetraquark states $Qq\bar{Q} \bar{q}$ in the improved chromomagnetic interaction model
论文作者
论文摘要
在改进的铬磁相互作用模型的框架内，我们完成了一项系统的研究，对$ s $ - 波特拉夸克（Tetraquark $ 1^{+（\ pm）} $，$ 2^{+（+）} $。预测四夸克状态的质谱是通过考虑角动量和$ \ MATHCAL {C} $ - 平等保护来分析可能的衰减通道。最近观察到的具有陌生性的隐藏障碍的tetraquark状态，例如$ z_ {cs}（3985）^ - $，$ x（3960）$和$ z_ {cs}（4220）^+$，在我们的模型中可以很好地解释。此外，根据每个Tetraquark州的波浪函数，我们发现每个$ qq \ bar {q} \ bar {q} $配置的低洼状态与$ q \ bar q $和$ q \ bar q $中的基础相关，而不是$ q $ q $ q $ q $ q $ q $ q $ q $ q $和q $ q $ b b b b q $ meson。这表明人们可以通过$ q \ bar q $和$ q \ bar q $梅森的渠道在将来的实验中搜索这些四夸克状态。
In the framework of the improved chromomagnetic interaction model, we complete a systematic study of the $S$-wave tetraquark states $Qq\bar{Q}\bar{q}$ ($Q=c,b$, and $q=u,d,s$) with different quantum numbers, $J^{PC}=0^{+(+)}$, $1^{+(\pm)}$, and $2^{+(+)}$. The mass spectra of tetraquark states are predicted and the possible decay channels are analyzed by considering both the angular momentum and $\mathcal{C}$-parity conservation. The recently observed hidden-charm tetraquark states with strangeness, such as $Z_{cs}(3985)^-$, $X(3960)$, and $Z_{cs}(4220)^+$, can be well explained in our model. Besides, based on the wave function of each tetraquark state, we find that the low-lying states of each $Qq\bar{Q}\bar{q}$ configuration have a large overlap to the $Q\bar Q$ and $q\bar q$ meson basis, instead of $Q\bar q$ and $q\bar Q$ meson basis. This indicates one can search these tetraquark states in future experiments via the channel of $Q\bar Q$ and $q\bar q$ mesons.
