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在手征夸克模型的框架下,研究了五夸克态 uudd的结构.分别考虑了 Jπ=(1/2)-和 Jπ=(1/2)+的各四个组态.结果表明对于不同的模型,不论 Jπ=(1/2)-和 Jπ=(1/2)+,T=0 的态的能量总是最低的.但是最低态的能量的理论计算值仍比Θ质量的实验值高250-300 MeV.

The structure of the pentaquark state uudd- is studied in the chiral quark model.Four configurations of Jπ=(1/2)- and four of Jπ=(1/2)+ are considered.The results show that the isospin T=0 state is always the lowest one for both Jπ=(1/2)- and Jπ=(1/2)+ cases in various models.But the theoretical value of the lowest one is still about 250 - 300 MeV higher than the experimental mass of Θ.

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