How to AvoidΔY=1Neutral Currents

The problem is posed of exhibiting a mechanism that avoids $\Delta Y=1\mathrm{}$ neutral currents without invoking experimentally unknown types of particles. The proposed solution rejects the Cabibbo rotation in favor of a mixing, between two types of unit-spin mesons, that is produced by the S${\mathrm{U}}_3$-symmetry-breaking interaction. One quantitative prediction that is well satisfied is the identity of the strong-interaction coupling constants appearing in ${\pi }^{\pm }$ decay and in ${\rho }^0\to e^{+}+e^{-}$.