$D^{(*)}Δ$ 相互作用与 $Σ_c(3200)^0$ 的分子态解释
$D^{(*)}Δ$ interactions and the molecular interpretation of $Σ_c(3200)^0$
- Hunan Normal University（湖南师范大学）
- Lanzhou University（兰州大学）
机构由 AI 辅助整理，请以论文原文为准。
AI总结：
基于LHCb观测到的$\Sigma_c(3200)^0$，在单玻色子交换框架下研究$D^{(*)}Δ$相互作用，提出$D^*Δ$分子态是其最自然候选，并预言多个分子伙伴态，为奇异粲重子提供统一解释。
AI中文摘要：
受LHCb合作组最近在$\Lambda_c^+\pi^-$不变质量谱中观测到$\Sigma_c(3200)^0$重子的启发，我们在单玻色子交换框架内对$D^{(*)}Δ$相互作用进行了全面研究。我们的结果表明，具有$I(J^P)=1(1/2^-)$量子数的$D^*Δ$分子态可以被视为$\Sigma_c(3200)$最自然的候选者，并预言了若干具有$I(J^P)=1(3/2^-, 5/2^-)$和$2(1/2^{\pm}, 3/2^{\pm}, 5/2^-)$量子数的$D^*Δ$分子伙伴态的存在。在考虑$DΔ$与$D^*Δ$之间的耦合道效应后，还出现了若干浅束缚的$DΔ$主导的分子候选态，特别是$I(J^P)=1,2(3/2^-)$和$2(1/2^+,3/2^+)$系统。这些结果为新观测到的$\Sigma_c(3200)^0$提供了统一的分子态解释，并为未来寻找奇异粲重子态的实验提供了有用指导。我们期望LHCb升级和Belle~II运行的高统计量数据将直接检验这些预言。
英文摘要：
Inspired by the recent observation of the $Σ_c(3200)^0$ baryon in the $Λ_c^+π^-$ invariant mass spectrum by the LHCb Collaboration, we perform a comprehensive investigation of the $D^{(*)}Δ$ interactions within the one-boson-exchange framework. Our results show that the $D^*Δ$ molecule with $I(J^P)=1(1/2^-)$ can be regarded as the most natural candidate for the $Σ_c(3200)$, and predict the existence of several $D^*Δ$ molecular partners with $I(J^P)=1(3/2^-, 5/2^-)$ and $2(1/2^{\pm}, 3/2^{\pm}, 5/2^-)$. After including the coupled channel effects between $DΔ$ and $D^*Δ$, several shallowly bound $DΔ$-dominated molecular candidates also emerge, especially for the $I(J^P)=1,2(3/2^-)$ and the $2(1/2^+,3/2^+)$ systems. These results provide a unified molecular interpretation of the newly observed $Σ_c(3200)^0$ and useful guidance for future experimental searches for exotic charmed-baryon states. We expect the high-statistics data from the LHCb Upgrade and Belle~II runs will directly test these predictions.
