TY - JOUR
T1 - Chiral SU(3) dynamics with coupled channels
T2 - Inclusion of p-wave multipoles
AU - Caro Ramon, J.
AU - Kaiser, N.
AU - Wetzel, S.
AU - Weise, W.
PY - 2000/6/5
Y1 - 2000/6/5
N2 - We extend our recent non-perturbative chiral SU(3) coupled channel approach to pion- and photon-induced η- and K-meson production off protons by including all strong and electromagnetic p-wave multipoles. We identify the p-wave amplitudes of the next-to-leading order SU(3) chiral meson-baryon Lagrangian with a coupled channel potential which is iterated to infinite orders in a separable Lippmann-Schwinger equation. Our approach to η- and K-photoproduction introduces no additional free parameters. By adjusting a few finite range parameters and the unknown parameters in the Lagrangian, we are able to simultaneously describe a very large amount of low-energy data. These include the total and differential cross sections of the π-induced reactions π-p→ηn,K0Λ,K0Σ 0,K+Σ- and π+p→K+Σ+ as well as those of photoproduction γp→ηp,K+Λ,K+Σ 0,K0Σ+. The polarization observables measured in η- and K-photoproduction are particularly sensitive to interference terms between the s- and p-wave multipoles. The total cross section data are remarkably well reproduced in all channels. There remain, however, some open questions concerning details of angular distributions and polarization observables.
AB - We extend our recent non-perturbative chiral SU(3) coupled channel approach to pion- and photon-induced η- and K-meson production off protons by including all strong and electromagnetic p-wave multipoles. We identify the p-wave amplitudes of the next-to-leading order SU(3) chiral meson-baryon Lagrangian with a coupled channel potential which is iterated to infinite orders in a separable Lippmann-Schwinger equation. Our approach to η- and K-photoproduction introduces no additional free parameters. By adjusting a few finite range parameters and the unknown parameters in the Lagrangian, we are able to simultaneously describe a very large amount of low-energy data. These include the total and differential cross sections of the π-induced reactions π-p→ηn,K0Λ,K0Σ 0,K+Σ- and π+p→K+Σ+ as well as those of photoproduction γp→ηp,K+Λ,K+Σ 0,K0Σ+. The polarization observables measured in η- and K-photoproduction are particularly sensitive to interference terms between the s- and p-wave multipoles. The total cross section data are remarkably well reproduced in all channels. There remain, however, some open questions concerning details of angular distributions and polarization observables.
UR - http://www.scopus.com/inward/record.url?scp=0001691042&partnerID=8YFLogxK
U2 - 10.1016/S0375-9474(99)00855-6
DO - 10.1016/S0375-9474(99)00855-6
M3 - Article
AN - SCOPUS:0001691042
SN - 0375-9474
VL - 672
SP - 249
EP - 269
JO - Nuclear Physics, Section A
JF - Nuclear Physics, Section A
IS - 1-4
ER -