论文标题
重新访问$ω（2012）$作为望子分子及其强烈的衰减
Revisiting the $Ω(2012)$ as a hadronic molecule and its strong decays
论文作者
论文摘要
最近，Belle协作测量了新观察到的$ω（2012）$兴奋状态的分支分数的比率。他们没有观察到$ω（2012）\ to \ bar {k}ξ^*（1530）\ to \ bar {k}πξ$衰减的显着信号，并报告了三个身体衰减与$ω（2012）\ bar \ bar \ bar {k} e {k}的两个身体衰减模式的比率的上限。在这项工作中，我们从分子的角度重新审视了新观察到的$ω（2012）$，从而从$ \ bar {k}ξ^*（1530）的$ \ bar {k} $ $ $ $ $ npy的$ 3/2^ - $ par的$ -Wave和K $ wave和k $ npas $ npy的$ \ bar {k} enpy and $ 3/2^y和k $ npuck $ d的contermenty spine and spin-parity $ 3/2^ - $中的动态产生的状态。借助$ d $ - 波互动的模型参数，我们表明，Belle协作最近报道的这些衰减分数的比率很容易容纳。
Recently, the Belle collaboration measured the ratios of the branching fractions of the newly observed $Ω(2012)$ excited state. They did not observe significant signals for the $Ω(2012) \to \bar{K} Ξ^*(1530) \to \bar{K} πΞ$ decay, and reported an upper limit for the ratio of the three body decay to the two body decay mode of $Ω(2012) \to \bar{K} Ξ$. In this work, we revisit the newly observed $Ω(2012)$ from the molecular perspective where this resonance appears to be a dynamically generated state with spin-parity $3/2^-$ from the coupled channels interactions of the $\bar{K} Ξ^*(1530)$ and $ηΩ$ in $s$-wave and $\bar{K} Ξ$ in $d$-wave. With the model parameters for the $d$-wave interaction, we show that the ratio of these decay fractions reported recently by the Belle collaboration can be easily accommodated.
