The Use of Dispersion Relations in the $ππ$ and $K\bar K$ Coupled-Channel System

Details The Use of Dispersion Relations in the $ππ$ and $K\bar K$ Coupled-Channel System The Use of Dispersion Relations in the $ππ$ and $K\bar K$ Coupled-Channel System

2001-03-04

arxiv.org/abs/hep-ph/0103042v3

Commun.Theor.Phys.48:685-694,2007

Physics

High Energy Physics

High Energy Physics - Phenomenology

22 pages with 5 eps figures. A numerical bug in previous version is fixed, discussions slightly expanded. No major conclusion

Scientific paper

10.1088/0253-6102/48/4/024

Systematic and careful studies are made on the properties of the IJ=00
$\pi\pi$ and $K\bar K$ coupled-channel system, using newly derived dispersion
relations between the phase shifts and poles and cuts. The effects of nearby
branch point singularities to the determination of the $f_0(980)$ resonance are
estimated and and discussed.

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