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We explore how chiral-symmetry constraints on weak-interaction matrixelements suggest the existence of an intermediate state sigma in severaldifferent weak-interaction processes. Particular attention is directed towardrecent evidence for a sigma within three-body nonleptonic weak decays.Comment: 14 pages, minor typos corrected, improved presentatio

FOOTPRINTS OF A BROAD σ(600) IN WEAK-INTERACTION PROCESSES