R. Dong, Hua-Xing Chen, Niu Su, Hong-Zhou Xi, Yi-Xin Yan
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引用次数: 0
摘要
在仔细研究了$\bar D \Sigma_c$强子分子态对应的费曼图后,我们提出了一种可能的由共享光夸克诱导的结合机制。我们用QCD求和规则的方法系统地研究了其对应的光-夸克交换相互作用,得到的结果表明$I=1/2$可能存在$\bar D \Sigma_c$共价分子。我们的QCD和规则分析进一步表明了一个模型无关的假设:当共享的轻夸克完全反对称从而服从泡利原理时,光-夸克交换相互作用是吸引的。
After carefully examining Feynman diagrams corresponding to the $\bar D \Sigma_c$ hadronic molecular state, we propose a possible binding mechanism induced by shared light quarks. We systematically study its corresponding light-quark-exchange interaction using the method of QCD sum rules, and the obtained results suggest that there can be the $\bar D \Sigma_c$ covalent molecule of $I=1/2$. Our QCD sum rule analyses further indicate a model-independent hypothesis: the light-quark-exchange interaction is attractive when the shared light quarks are totally antisymmetric so that obey the Pauli principle.