Decay of Hyperons and Mesons from the Universal Fermi Interaction

The decay of the hyperon, charged pion, and $K$ meson except ${K_{\pi 3}}^{+}$ is investigated on the basis of the universal $V-A$ Fermi interaction together with the idea of the Gell-Mann tetrahedron, by treating the virtual baryon-antibaryon pair effect in a phenomenological way. It is shown that the decay rate of ${K_{\pi 2}}^{+}$ calculated by the parameters adjusted to the decay of ${\pi }^{+}$, ${K_{\mu 3}}^{+}$, and ${K_{e3\mathrm{}}}^{+}$ is in agreement with experiment, thus suggesting a possible consistent picture of the model.