4 papers
S-P wave interference in the K+K- photoproduction on hydrogen
L. Bibrzycki, L. Lesniak, A. P. Szczepaniak
We have studied the partial wave interference effects to obtain a new information about the contribution of the S-wave to the cross section of the K+K- photoproduction on hydrogen.…
Application of Roy's equations to analysis of pion-pion experimental data
B. Loiseau, R. Kaminski, L. Lesniak
The scalar-isoscalar, scalar-isotensor and vector-isovector pion-pion partial wave amplitudes are analyzed. Preliminary results indicate that only the scalar-isoscalar amplitude fi…
Peculiarities in multichannel interaction amplitudes for meson-meson scattering and scalar meson spectroscopy
R. Kaminski, L. Lesniak, B. Loiseau
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 mul…
Theoretical constraints on interaction amplitudes of light mesons
R. Kaminski, L. Lesniak, K. Rybicki
We impose unitarity constraints on the S-wave isoscalar pion-pion amplitudes extracted from the analysis of the pi- p ---> pi+ pi- n data which have been measured by the CERN-Craco…