| QQqq Four-Quark Bound States in Chiral SU（3） Quark Model |
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| 作者姓名： | ZHANG Ming ;ZHANG Hai-Xia ;ZHANG Zong-Ye |
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| 作者单位： | [1]Institute of High Energy Physics, the Chinese Academy of Sciences, P.O. Box 918-4, Beijing 100049, China; [2]Graduate School of the Chinese Academy of Sciences, Beijing 100049, China; [3]School of Biomedical Engineering, Capital Medical University, Beijing 100069, China |
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| 基金项目： | The project supported in part by the National Natural Science Foundation of China under Grant Nos. 10475087 and 10775146 |
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| 摘 要： | Abstract The possibility of QQqq heavy-light four-quark bound states has been analyzed by means of the chiral SU（3） quark model, where Q is the heavy quark （c or b） and q is the light quark （u, d, or s）. We obtain a bound state for the bbnn configuration with quantum number JR=1^＋, I = 0 and for the ccnn （JR=1^＋, I=O） configuration, which is not bound but slightly above the D^＊ D^＊ threshold （n is u or d quark）. Meanwhile, we also conclude that a weakly bound state in bbnn system can also be found without considering the ehiral quark interactions between the two light quarks, yet its binding energy is weaker than that with the chiral quark interactions.
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| 关 键 词： | 夸克模型 手性对称模型 边界状态 物理 |
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