Sigma-Meson and Confinement Singularity

A. V. Anisovich, V. V. Anisovich, M. A. Matveev +5

We describe the meson-meson data for the ($I{J}^{PC}=00^{++}$) wave at $280\le \sqrt{s}\le 1900$ MeV in two approaches: (i) the K-matrix approach and (ii) the dispersion relation D-m…