Test of Cabibbo's model in hyperon semileptonic decays

Abstract

The experimental rates and angular correlation and symmetry coefficients are used to test Cabibbo's model in semileptonic hyperon decays. The data indicate that the one-angle model should be relaxed. We consider the possibility that ${\theta }_V\ne {\theta }_A$, and we investigate the influence of the $q^2$ dependence of the form factors. We find that the present data are sufficiently accurate to detect symmetry-breaking effects.