论文标题
完全开放式的tetraquark状态$ bc \ bar {q} \ bar {s} $和$ sc \ bar {q} \ bar {b} $ at $ j^{p} = 0^{+}，1^{+} $
Fully open-flavor tetraquark states $bc\bar{q}\bar{s}$ and $sc\bar{q}\bar{b}$ with $J^{P}=0^{+},1^{+}$
论文作者
论文摘要
我们已经研究了完全开放式的tetraquark状态$ bc \ bar {q} \ bar {s} $和$ sc \ bar {q} \ bar {b} $，带量子数字$ j^{p} = 0^{+}，1^{+} $。我们系统地构建了所有diquark-antiquark插值电流，并计算QCD总规则方法框架中的两点相关函数和光谱密度。我们的计算表明，对于$ bc \ bar {q} \ bar {s} $ tetraquark States和$ 7.0-7.1 $ gev的$ bc \ bar {q} \ bar {q} \ bar {q} \ bar {b} $ tetraraquarks的$ 7.1-7.2 $ GEV。 $ bc \ bar {q} \ bar {s} $ tetraquarks的质量低于$ \ bar {b} _ {s} _ {s} d $和$ \ bar {b} _ {s} _ {s}^{*}^{*} d $最终状态的标量和轴向通道的最终状态。 $ sc \ bar {q} \ bar {b} $ tetraquark带有$ j^{p} = 1^{+} $位于$ b_ {c}^{+}^{+} k^{*} $和$ b_ {*} $ and $ b_ {s}^}^{*} d $ theSholds。对于这些可能的四夸克国家来说，如此低的质量表明，它们只能通过弱相互作用衰减，因此非常狭窄和稳定。
We have studied the masses for fully open-flavor tetraquark states $bc\bar{q}\bar{s}$ and $sc\bar{q}\bar{b}$ with quantum numbers $J^{P}=0^{+},1^{+}$. We systematically construct all diquark-antiquark interpolating currents and calculate the two-point correlation functions and spectral densities in the framework of QCD sum rule method. Our calculations show that the masses are about $7.1-7.2$ GeV for the $bc\bar{q}\bar{s}$ tetraquark states and $7.0-7.1$ GeV for the $sc\bar{q}\bar{b}$ tetraquarks. The masses of $bc\bar{q}\bar{s}$ tetraquarks are below the thresholds of $\bar{B}_{s}D$ and $\bar{B}_{s}^{*}D$ final states for the scalar and axial-vector channels respectively. The $sc\bar{q}\bar{b}$ tetraquark states with $J^{P}=1^{+}$ lie below the $B_{c}^{+}K^{*}$ and $B_{s}^{*}D$ thresholds. Such low masses for these possible tetraquark states indicate that they can only decay via weak interaction and thus are very narrow and stable.
