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Footprints of a Broad σ(600) in Weak-Interaction Processes

V. Elias, A. D. Polosa, M. D. Scadron, N. A. Törnqvist

hep-pharXiv:hep-ph/0005106

Abstract

We explore how chiral-symmetry constraints on weak-interaction matrix elements suggest the existence of an intermediate state sigma in several different weak-interaction processes. Particular attention is directed toward recent evidence for a sigma within three-body nonleptonic weak decays.

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