Аннотация:The spectrum of q2q2 , JP = 0 +, 2 + mesons is discussed. We have shown that due to instanton-induced forces the physical states are strong mixtures of the SU_f(3) group basis states. The cross-sections for annihilation of the NN system into (q2q2)(qq) mesons are obtained. The
a0(980) meson is considered as q2q2 meson consisting of 9_f and 36_f plets. The branchings are also predicted for the cross-sections for production of the a0(980) and tensor q2q2 mesons in NN annihilation.