at large separations, it is energetically profitable for the KNN system to exist in the N $\Sigma(1385)$ configuration, with the nucleon and $\Sigma(1385)$ weakly repelling each other. At shorter distances the condition $ 1 + G^{ss} f ^s \approx 0 $ determines the attraction generated by $\Lambda(1405)$. Despite repulsive effects of the $P$ wave interaction such a solution yields the strongest binding, since a large piece of the binding energy is hidden within the structure of $\Sigma(1385)$.

The KNN system is built on short range KN and NN correlations and the $ \Psi(\bf{r},\bf{x})$ contains a large number of partial waves coupled to zero total angular momentum. In Jacobi coordinates $(r,s)$ the $L_r \otimes L_s $ decomposition of the first term of $ \Psi(\bf{r},\bf{x})$ is mainly $ S \otimes S $. Both terms involve even values of $L_r $ and the spin-isospin structure of the NN pair is either $ I_{NN}=0 , S_{NN}=1$ or $ I_{NN}=1 , S_{NN}=0$. Both types of states may be formed.

Other solutions are determined by $D_P=0$. This condition allows amplitudes of different symmetry $\psi^s = \psi^s_1 =- \psi^s_2$ and $ \psi^p =\psi^p_1 =  \psi^p_2 $. In comparison with Eq. \[I6\], the wave functions for the KNN 