Leptonic decays of baryons

Formulae are obtained for the differential decay rate, lepton spectrum, and partial lifetime for the leptonic decays of baryons, which cover effects down to the order of one percent. A weak, linearq ²-dependence of the form factors is included, which should be a sufficiently good approximation in the physicalq ²-range allowed in the decays. The one percent discrepancy arises as a consequence of the above-mentioned approximation to the form factors, whose value and slope atq ²=0 are left open in the formulae;SU(3) symmetry, CVC, and PCAC yield an estimate for these parameters.