Relations among neutral current couplings to test the SU(2) ⊗ U(1) gauge group structure

The experimental implications of neutral heavy leptons N in e⁺e^? annihilation are examined. We calculate the production rate of both right-handed and left-handed N's at SPEAR and PEP/PETRA energies and show that observation of the process $\text{e}{}^{\mathrm{+}}\text{e}{}^{\mathrm{?}}\text{→}\text{ν}\text{?}\text{N}\text{,}\text{N}\text{→}\text{e}$ (or μ)π allows the determination of both the mass and handedness of N.