RENORMALIZATION OF STRANGENESS-CHANGING AXIAL-VECTOR COUPLING CONSTANTS

Using the recently determined KNΛ coupling constant and the multichannel effective-range analysis of the K̄N system, the renormalized axial-vector coupling constants gAΛ for the decay Λ→p+e- +v̄ and gA for the decay -→n+e-+v̄ are recalculated, using the method of Adler and Weisberger. The results |gAΛ|=0.77±0.1 and |gA-|=0.55±0.2 agree well with the best-fit solution to all leptonic baryon decays based on the Cabibbo theory, but disagree with the recent experimental results from the decay angular distribution of polarized baryons. The mass-continuation problem is investigated in detail, and its effect is shown to be non-negligible. © 1968 The American Physical Society.