论文标题
在耦合通道方法中了解$ω（2012）$的性质
Understanding the nature of $Ω(2012)$ in a coupled-channel approach
论文作者
论文摘要
我们对$ω（2012）$共振的质量和强衰变进行系统分析，该元素是裸露的三夸克状态和复合梅森 - 巴里昂州的耦合通道方法。除了裸露状态和$ξ^* \ bar k $通道的耦合外，还包括有效的梅森 - 巴里昂互动。我们通过解决伯特 - 盐分方程式找到了一根质量为2008美元MEV的杆子。计算出的衰减宽度及其分支分数的比率$ \ MATHCAL {r} _ {ξ\ bar k}^{ξπ\ bar k} $与Belle协作的新实验测量非常吻合。我们的结果表明，三夸克核心和$ξ^* \ bar k $通道对于$ω（2012）$共振至关重要。我们希望目前的计算可以帮助我们更好地了解$ω（2012）$共振的性质。
We perform a systematic analysis of the mass and strong decays of the $Ω(2012)$ resonance in a coupled-channel approach of a bare three-quark state and a composite meson-baryon state. Besides the coupling of the bare state and $Ξ^* \bar K$ channel, the effective meson-baryon interactions are also included. We find a pole with mass of $2008$ MeV by solving the Bethe-Salpeter equation. The calculated decay widths and its ratios of branching fractions $\mathcal {R}_{Ξ\bar K}^{Ξπ\bar K}$ agree well with the new experimental measurement by Belle Collaboration. Our results suggest that both three-quark core and $Ξ^* \bar K$ channel are essential for the description of the $Ω(2012)$ resonance. We expect that present calculations can help us to better understand the nature of $Ω(2012)$ resonance.
