Determination of the Weak Neutral-Current Couplings of the Electron

A model-independent analysis of new data provides, for the first time, a unique determination of the weak neutral-current couplings of the electron, if we disregard the parity violation in atomicf transitions and the neutrino electron scattering reported by the Gargamelle collaboration at CERN-SPS. The recent result at SLAC for inelastic scattering of longitudinally polarized electrons from deuterium is a crucial new input in this analysis. The solution is consistent with the Weinberg-Salam model, but disagrees with the vectorlike gauge model of the electron.