Hadronic η and decays
Helmholtz-Institut für Strahlen- und Kernphysik (Theorie), Universität Bonn, Nußallee 14-16, D-53115, Bonn, Germany
Accepted: 20 December 2005
Published online: 23 January 2006
The hadronic decays η,↦3π and ↦ηππ 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 overall agreement with currently available data on decay widths and spectral shapes is achieved.
PACS: 12.39.Fe Chiral Lagrangians – / 13.25.Jx Decays of other mesons –
© Società Italiana di Fisica and Springer-Verlag, 2006