Abstract : Interactions in coupled channels pipi, KKbar and an effective 2pi2pi in scalar-isoscalar wave have been analysed. Influence of interchannel couplings on analytical structure of multichannel interaction amplitudes has been studied. Interplay of S-matrix zeroes and poles and their relation with parameters of scalar resonances has been investigated.
R. Kaminski, L. Lesniak, B. Loiseau. Peculiarities in multichannel interaction amplitudes for meson-meson scattering and scalar meson spectroscopy. Meson 2000 Workshop, May 2000, Cracow, Poland. 31. <in2p3-00193689>