The light sigma meson

Abstract

In the framework of the dispersion relation N/D-approach, we restore the low-energy pi-pi (IJ^{PC}=00^{++})-wave amplitude sewing it with the previously obtained K-matrix solution for the region 450-1900 MeV. The restored N/D-amplitude has a pole on the second sheet of the complex-s plane near the pi-pi threshold, that is the light sigma meson.

5 pages, LaTeX, 3 EPS figures, epsfig.sty

Cited by in corpus (8)

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• Determination of hadronic partial widths for scalar-isoscalar resonances f0(980), f0(1300), f0(1500), f_0(1750) and the broad state f0(1530^{+90}_{-250})
• Second sheet $\sigma$ pole and the threshold enhancement of the spectral function in the scalar-isoscalar meson-sector
• Scalar mesons and low-mass sigma: Does the $\sigma$ reveal the confinement singularity?
• A New Decomposition of pion-pion S-wave Interaction
• Quark-gluonium content of the scalar-isoscalar states f_0(980), f_0(1300), f_0(1500), f_0(1750), f_0(1420 ^{+150}_{- 70}) from hadronic decays
• $\sigma (600)$ and background in $\pi \pi$ scattering