论文标题
新观察到的$ξ_c（2923）^0 $，$ξ_c（2939）^0 $和$ξ_c（2965）^0 $ resonances的规范解释
Canonical interpretations of the newly observed $Ξ_c(2923)^0$, $Ξ_c(2939)^0$ and $Ξ_c(2965)^0$ resonances
论文作者
论文摘要
在$λ_c^+ k^ - $ spectrum中观察到了三个中性共振$ξ_c（2923）^0 $，$ξ_c（2939）^0 $和$ξ_c（2965）^0 $。给定$ξ_c$和$ξ_c^\ prime $ $质量光谱由组成夸克模型预测，这三个共振被暂时视为$λ-$模式$ mode $ mode $ξ_c（2s）$，$ξ_c^\ prime（2s）强烈的衰减行为是在$^3P_0 $模型中计算出来的。我们的结果表明，可以将$ξ_c（2923）^0 $和$ξ_c（2939）^0 $澄清到$ j^p = 3/2^ - $和$ 5/2^ - $ 5/2^ - $ $ $ $ $ chc^\ prime（1p）$，以及$ eCC（2965）$ $ jc（2965） $ξ_c^\ prime（2s）$状态。另外，我们建议先前观察到的$ξ_c（2930）$可能是两个结构$ξ_c（2923）$和$ξ_c（2939）$的重叠，而$ξ_c（2970）$应与$ξ_c（2965）$相同的状态。有关丢失$ξ_c（2s）$，$ξ_c^{\ prime *}（2s）$的其他理论信息，$ξ_c^\ prime（1p）$状态可能有助于将来的实验搜索。
Three neutral resonances $Ξ_c(2923)^0$, $Ξ_c(2939)^0$ and $Ξ_c(2965)^0$ have been observed in the $Λ_c^+ K^-$ mass spectrum by the LHCb Collaboration. Given the $Ξ_c$ and $Ξ_c^\prime$ mass spectra predicted by the constituent quark models, these three resonances are tentatively treated as the $λ-$mode $Ξ_c(2S)$, $Ξ_c^\prime(2S)$, $Ξ_c^{\prime *}(2S)$, and $Ξ_c^\prime(1P)$ states, and their strong decay behaviors are calculated within the $^3P_0$ model. Our results indicate that the $Ξ_c(2923)^0$ and $Ξ_c(2939)^0$ can be clarified into the $J^P=3/2^-$ and $5/2^-$ $Ξ_c^\prime(1P)$ states respectively, and the $Ξ_c(2965)^0$ can be regarded as the $J^P=1/2^+$ $Ξ_c^\prime(2S)$ state. Also, we suggest that the previous observed $Ξ_c(2930)$ may be the overlap of two structures $Ξ_c(2923)$ and $Ξ_c(2939)$, and the $Ξ_c(2970)$ should be the same state as $Ξ_c(2965)$. Other theoretical information on the missing $Ξ_c(2S)$, $Ξ_c^{\prime *}(2S)$, and $Ξ_c^\prime(1P)$ states may be helpful for future experimental searches.
