CHIRAL ANOMALIES IN NONLEPTONIC DECAYS WITHIN CHIRAL PERTURBATION-THEORY AT THE QUARK LEVEL

By the example of the K+ --> pi+pi0gamma decay the contribution of chi ral anomalies to non-leptonic weak decays of K-mesons has been investi gated at the quark level. The theoretical prediction for the probabili ty of the K+ --> pi+pi0gamma decay with the direct emission of a photo n is B(K+ --> pi+pi0gamma(DE))anom less-than-or-equal-to (1.1 +/- 0.2) x 10(-5). It is stressed that the mechanism of the DELTA(I) = 1/2 tra nsition in the K+ --> pi+pi0gamma decay differs from that governing th e enhancement of the DELTAI = 1/2 transitions in the K0 --> pi+pi-deca y.