The nonleptonic decay amplitudes of the K mesons are calculated using current algebra and the spectral-function sum rules. The result is convergent in the intermediate-boson model, but not for a direct current-current interaction. Comparison with the observed rate for K₁⁰ decay shows that the intermediate-boson mass is about 8 BeV.
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Glashow et al. (1967) studied this question.
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