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A straightforward SU(3) × U(1) model in which there is effectively one new neutral-current parameter (denoted by R) is shown to give the canonical neutrino neutral-current predictions for all values of R. For small R the 'low-energy' theory is essentially SU(2) × U(1) while for R of the order of one it has a much richer 'low-energy' gauge-boson mass spectrum. Even in the latter case, the predicted e−d asymmetry agrees with experiment. It is interesting that the atomic-physics parity violation depends sensitively on R

Canonical neutral-current predictions from the weak-electromagnetic gauge group SU(3) × U(1)