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Abstract
Nonleptonic decays of hyperons are discussed in connection with the breaking of chiral SU(3) ⊗SU(3). We assume an effective ∂µJµ7(x) interaction of nonleptonic decays, which is reduced to HW(x) = -iG[Q7(x0)+Q57(x0), m0(S0(x)+λS8(x))]. The amplitudes of the decays calculated in hard-pion limit give a good agreement with experiment both for S-waves and P-waves. In addition, it is shown that the f/d ratio of scalar spurion is -3.06, which is very close to that of mass-splitting -3.05, and λ= 2.01. Therefore one may identify m0(S0(x)+λS8(x)) as a mass operator, and then the strength of weak ∂µJµ7(x) interaction is estimated to be G = 0.232 ×10-5.
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