Effects of S-wave thresholds

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 $\pi \pi$ 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.

17 pages, 2 figures. Two additional references; typographic correction. To be published in Phys. Rev. D

References in corpus (13)

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• A low-lying scalar meson nonet in a unitarized meson model
• Three dimensional image correlation from X-Ray computed tomography of solid foam
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