O ct 2 00 5 Hadronic η and η ′ decays
نویسندگان
چکیده
The hadronic decays η, η ′ → 3π and η ′ → 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 sand 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.
منابع مشابه
X iv : h ep - p h / 03 01 05 8 v 1 9 J an 2 00 3 Hadronic decays of η and η ′ with coupled channels 1
The hadronic decays η → πππ, η ′ → πππ and η ′ → ηππ are investigated within a U (3) chiral unitary approach. Final state interactions are included by deriving the effective s-wave potentials for meson meson scattering from the chiral effective Lagrangian and iterating them in a Bethe-Salpeter equation. With only a small set of parameters we are able to explain both rates and spectral shapes of...
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