论文标题
进一步了解手性夸克模型中$ω（2012）$的性质
Further understanding the nature of $Ω(2012)$ within a chiral quark model
论文作者
论文摘要
在我们以前的作品中，我们分析了手性夸克模型中低洼$ω$ baryon状态的两体强衰变。结果表明，$ω（2012）$共振有利于$ j^p = 3/2^ - $分类的三夸克状态。通过这项任务，在目前的工作中，我们进一步研究了三体强衰变$ω（2012）\ toξ^*（1530）\ bar {k} \ toξπ\ bar {k} $ and coupled-channel-channel-channel frompts of $ω（2012）$来自附近的通道$ $ξ^*（1530）\ bar {k} $也在手性夸克模型中。发现$ω（2012）$共振在三体最终状态$ξπ\ bar {k} $中具有相当大的衰减率。预测比率$ r_ {ξ\ bar {k}}^{ξπ\ bar {k}} = \ Mathcal {b} [b} [ω（2012）\至ξ^*（1530）\ bar {k} ξ\ bar {k}] \ simeq 12 \％$接近UP限制$ 11 \％$，由Belle协作在2019年衡量，但是，我们的预测比率太小，无法与最近的数据$ 0.97 \ pm 0.31 $相提并论。此外，我们的结果表明，对$ω（2012）$的耦合通道影响不大，其组件应由裸露的三夸克状态主导，而分子组件的比例仅为$ \ sim 16 \％$。为了澄清$ω（2012）$的性质，比率$ r_ {ξ\ bar {k}}}^{ξπ\ bar {k}} $预计将通过其他实验测试。
In our previous works, we have analyzed the two-body strong decays of the low-lying $Ω$ baryon states within a chiral quark model. The results show that the $Ω(2012)$ resonance favors the three-quark state with $J^P=3/2^-$ classified in the quark model. With this assignment, in the present work we further study the three-body strong decay $Ω(2012)\to Ξ^*(1530)\bar{K} \to Ξπ\bar{K}$ and coupled-channel effects on $Ω(2012)$ from nearby channels $Ξ\bar{K}$, $Ωη$ and $Ξ^*(1530)\bar{K}$ within the chiral quark model as well. It is found that the $Ω(2012)$ resonance has a sizeable decay rate into the three-body final state $Ξπ\bar{K}$. The predicted ratio $R_{Ξ\bar{K}}^{Ξπ\bar{K}}=\mathcal{B}[Ω(2012)\to Ξ^*(1530)\bar{K}\to Ξπ\bar{K}]/\mathcal{B}[Ω(2012)\to Ξ\bar{K}]\simeq 12\%$ is close to the up limit $11\%$ measured by the Belle Collaboration in 2019, however, our predicted ratio is too small to be comparable with the recent data $0.97\pm 0.31$. Furthermore, our results show that the coupled-channel effects on the $Ω(2012)$ is not large, its components should be dominated by the bare three-quark state, while the proportion of the molecular components is only $\sim 16\%$. To clarify the nature of $Ω(2012)$, the ratio $R_{Ξ\bar{K}}^{Ξπ\bar{K}}$ is expected to be tested by other experiments.
