论文标题
建立低洼$ p $ - 波$σ_b$状态
Toward establishing the low-lying $P$-wave $Σ_b$ states
论文作者
论文摘要
In the present work, we analyze the $P$-wave singly-heavy baryon spectrum belonging to $\mathbf{6}_F$ by combining the observations of the heavy baryon states, and restudy the strong decays of the $1P$ wave $Σ_b$ states within the $j$-$j$ coupling scheme using the chiral quark model.我们获得了：（i）在$λ_bπ$最终状态中观察到的结构$σ_b（6097）$可能是由于$σ_b| j^p = \ frac {3} {3} {2}^ - ，2 \ rangle $ and $ frac $ and $σ_b| （ii）在$λ_bππ$最终状态下观察到的宽结构$σ_b（6072）$可能是由于$σ_b| j^p = \ frac {1} {1} {2}^ - ，1 \ rangle $和$σ_b| （iii）缺失状态$σ_b| j^p = \ frac {1} {2}^ - ，0 \ rangle $最有可能是狭窄状态，宽度为$γ\ sim10 $ mev，并且主要衰减到$λ_bπ$通道中。
In the present work, we analyze the $P$-wave singly-heavy baryon spectrum belonging to $\mathbf{6}_F$ by combining the observations of the heavy baryon states, and restudy the strong decays of the $1P$ wave $Σ_b$ states within the $j$-$j$ coupling scheme using the chiral quark model. We obtain that: (i) the structure $Σ_b(6097)$ observed in the $Λ_bπ$ final state may arise from the overlapping of $Σ_b|J^P=\frac{3}{2}^-,2\rangle$ and $Σ_b|J^P=\frac{5}{2}^-,2\rangle$. (ii) The broad structure $Σ_b(6072)$ observed in the $Λ_bππ$ final state may arise from the overlapping of $Σ_b|J^P=\frac{1}{2}^-,1\rangle$ and $Σ_b|J^P=\frac{3}{2}^-,1\rangle$. (iii) The missing state $Σ_b|J^P=\frac{1}{2}^-,0\rangle$ is most likely to be a narrow state with a width of $Γ\sim10$ MeV, and mainly decays into $Λ_bπ$ channel.
