6 papers
The antinucleon-nucleon quasi-bound states: J/psi and atomic evidence
S. Wycech, B. Loiseau
The measurements of J/psi decays into photon, proton and antiproton show a strong enhancement at the proton-antiproton threshold not seen in the decays into neutral pion, proton an…
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…
Two-Pion Exchange in proton-proton Scattering
W. R. Gibbs, Benoit Loiseau
We present calculations of the two-pion-exchange contribution to proton-proton scattering at 90 degrees using form factors appropriate for representing the distribution of the cons…
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…
Multichannel Interaction Analysis of Scalar Mesons Below 1800 MeV
R. Kamiński, L. Leśniak, B. Loiseau
Properties of scalar--isoscalar mesons in a mass range from pi-pi threshold up to 1800 MeV are analysed using an unitary model with separable interactions in three decay channels:…
The Pion-Nucleon coupling constant from np charge exchange scattering
B. Loiseau, T. E. O. Ericson, J. Rahm +2
A novel extrapolation method has been used to deduce the charged Pion-Nucleon coupling constant from backward differential scattering cross sections. We applied it to new meas…