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Effects of S-wave thresholds

Jonathan L. Rosner
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Abstract

The opening of a new S-wave threshold is frequently accompanied by an abrupt dip in the magnitude of an amplitude for an already-open channel. One familiar example is the behavior of the I=0 S-wave $ππ$ scattering amplitude at $K \bar K$ threshold. Numerous other examples of this phenomenon in recent data are noted, and a unified description of the underlying dynamics is sought.

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Jonathan L. Rosner. 2006-10-06. Effects of S-wave thresholds. https://doi.org/10.1103/physrevd.74.076006

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