decay. An especially strong bound on the mixing angle is obtained,− 0.0006< ζ< 0.0028, when the unitarity of the KMC matrix is taken into account. This complements the muon- decay data, increasing the lower bound on M2 to 496 GeV.
The effect of manifest left-right symmetry in right-handed currents is studied in neutron beta decay. An especially strong bound on the mixing angle is obtained, − 0.0006 < ζ < 0.0028, when the unitarity of the KMC matrix is taken into account. This complements the muon-decay data, increasing the lower bound on M2 to 496 GeV.