Abstract
We propose a model for the K μ3 and K e3 decay modes based on the analytic properties of the invariant form factors and on the notion of a “partially conserved” strangeness-changing current. While the expressions we derive for the K μ3, K e3 branching ratio and the various spectra involve an arbitrary parameter, the observed large branching ratio of K μ3 to K e3, of the order of unity, leads to very definite predictions about the pion energy spectra in the two decay modes. If the model is successful, these decay modes present a good test of the intermediate vector boson hypothesis for weak interactions, provided the vector boson is not much heavier than the K-meson.
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