Covalent hadronic molecules via QCD sum rules
DOI:
https://doi.org/10.31349/SuplRevMexFis.3.0308036Keywords:
hadronic molecule, covalent bond, QCD sum rulesAbstract
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.
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Copyright (c) 2022 Rui-Rui Dong, Hua-Xing Chen, Niu Su, Hong-Zhou Xi, Yi-Xin Yan (Author)
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