CURRENT-ALGEBRA MODEL OF DELTAI=3/2 EFFECTS IN NONLEPTONIC KAON DECAY

We construct a two-parameter semiphenomenological model for nonleptonic kaon decay under the following assumptions: (i) All single soft-π limits are satisfied; (ii) aside from pole terms, amplitudes can be expanded as a power series in the pion momenta q; and (iii) in particular, we include in πq|Hw|Kk only first-and zeroth-order terms in q. Our ΔI=12 results are then identical to the recent work of McNamee. Because of our inclusion of q dependence, nonzero ΔI=32 effects are also permitted and are found to be in agreement with the model of Bouchiat and Meyer to order mπ2MK2. A theoretical estimate of the size of the first-order terms is found to agree with experiment. Uncertainties inherent in our method are discussed. © 1969 The American Physical Society.