Peculiarities in multichannel interaction amplitudes for meson-meson scattering and scalar meson spectroscopy
R. Kaminski, L. Lesniak, B. Loiseau
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.
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