Effects ofS-wave thresholds

2006/08/31 by Jonathan L. Rosner · 10 citations
Physics and Astronomy · #Particle physics theoretical and experimental studies #Quantum Chromodynamics and Particle Interactions #Quantum chaos and dynamical systems #hep-ex #hep-ph

paper · pdf · doi:10.1103/physrevd.74.076006

published as Phys.Rev.D74:076006,2006 · 17 pages, 2 figures. Two additional references; typographic correction. To be published in Phys. Rev. D

arxiv created 2006/10/06 · openalex publication_date 2006/10/23 · arxiv updated 2009/12/01 · openalex created_date 2016/06/24 · openalex updated_date 2026/07/29

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 \ensuremathπ\ensuremathπ scattering amplitude at KK threshold. Numerous other examples of this phenomenon in recent data are noted, and a unified description of the underlying dynamics is sought.

Citations

• Behaviour of S-Wave poles Near Threshold and the Scalar Meson Nonet Below 1 GeV
• Sigma, Kappa, fo(980) and a0(980)
• Effects of Configuration Interaction on Intensities and Phase Shifts
• On the narrow dip structure at 1.9 GeV/c² in diffractive photoproduction

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