摘要
We take the model space of the two-baryon system as |NN】+|N△】|πNN】. The model space is separated into P（P<sub>N</sub>+P<sub>△</sub>） space |NN】+|N△】, and Q space|πNN】, and these two spaces are coupled by the vertex V<sub>(</sub>z.N△.By eliminating the Q space, the effective interaction in the P space is given
基金
Project supported by the National Natural Science Foundation of China.
