论文标题
低洼$ρ$ -mode $ 1p $ - 波$ -Wave单一重型重男baryons的强烈衰减
The strong decays of the low-lying $ρ$-mode $1P$-wave singly heavy baryons
论文作者
论文摘要
我们已经系统地计算了低洼的$ρ$ -mode $ 1p $ -mode $λ_{c（b）} $，$σ_{c（b）} $，$ξ_{c（b）} $，$σ_{c（b）} $，$σ_在$ J $ - $ J $耦合方案中。对于有争议的状态，我们的结果表明：（i）对于单一迷人的重型重子，新观察到的$λ_{c}（2910）^+$是$ j^p = 5/2^ - $ j^p = 5/2^ - $ state $ state $ state $ c |λ_c| j^{p} p} （ii）对于单一的底部沉重的baryons，$ξ_{b}（6227）^ - $倾向于$ j^{p} = 5/2^{ - } $ state $ state $ξ_{b} | j^{p} = \ frac {p} (iii) The other missing $ρ$-mode $1P$-wave excitations in $Λ_{b}$, $Σ_{c(b)}$ and $Ξ^{'}_{c(b)}$ families appear to be broad structures with $Γ$$\sim$(100-200) MeV, and their strong decay widths are sensitive to their masses. （iv）$ρ$ -Mode $ 1p $ -wave $ξ_{c（b）} $和$ω_________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________-
We have systematically calculated the strong decays of the low-lying $ρ$-mode $1P$-wave $Λ_{c(b)}$, $Σ_{c(b)}$, $Ξ_{c(b)}$, $Ξ^{'}_{c(b)}$, $Ω_{c(b)}$ baryons using the chiral quark model within the $j$-$j$ coupling scheme. For the controversial states, our results indicate: (i) For the singly charmed heavy baryons, the newly observed $Λ_{c}(2910)^+$ is a good candidate of the $J^P=5/2^-$ state $Λ_c|J^{P}=\frac{5}{2}^{-},2\rangle_ρ$. (ii) For the singly bottom heavy baryons, the $Ξ_{b}(6227)^-$ favors the $J^{P}=5/2^{-}$ state $Ξ_{b}|J^{P}=\frac{5}{2}^{-},2\rangle_ρ$. (iii) The other missing $ρ$-mode $1P$-wave excitations in $Λ_{b}$, $Σ_{c(b)}$ and $Ξ^{'}_{c(b)}$ families appear to be broad structures with $Γ$$\sim$(100-200) MeV, and their strong decay widths are sensitive to their masses. (iv) The $ρ$-mode $1P$-wave $Ξ_{c(b)}$ and $Ω_{c(b)}$ baryons have a relatively narrow decay width of a few MeV or a few tens of MeV, and have a good potential to be observed in forthcoming experiments.
