Decays of eta and eta-prime within a chiral unitary approach

Abstract

Various decays of eta and eta-prime are investigated within the framework of U(3) chiral effective field theory in combination with a relativistic coupled-channels approach. Final state interactions are included by deriving s- and p-wave interaction kernels for meson-meson scattering from the chiral effective Lagrangian and iterating them in a Bethe-Salpeter equation. Very good agreement with experimental data is achieved.

Comments: 7 pages, 2 figures, 3 tables, presented at the Eta'05 Workshop