parity violation

As mentioned before, experiments with polarized nuclei demonstrate unmistakably that parity is not conserved. The fact that electrons and positrons emitted in beta-decay possess a high degree of longitudinal polarization provides a new tool for the determination of the fundamental beta-interaction. If the 2-state theory with lepton conservation is assumed, the experimental result that positrons are right-polarized implies that positrons are always emitted together with vR-neutrinos. This would mean that the beta-interaction is A and V.