MEASUREMENT OF RATIO OF AXIAL-VECTOR TO VECTOR CURRENT IN DECAY SIGMA-]NE-V

From approximately 550 I-electronic decays produced by stopping K- in liquid hydrogen we have selected a sample of 49 events in which the neutron from the I- leptonic decay is detected by a subsequent n-p scatter. A maximum-likelihood analysis, including the effect of about 20% background, indicates that the magnitude of the ratio of the coupling constants is |GaGV|=0.23±0.16, in excellent agreement with the prediction of the Cabibbo theory. © 1969 The American Physical Society.