η, → πl+l- in a chiral unitary approach

B. Borasoy; R. Nißler

doi:10.1140/epja/i2007-10396-3

EPJ

η, $\eta{^\prime}$ → πl⁺l^- in a chiral unitary approach

B. Borasoy and R. Nißler

Universität Bonn, Helmholtz-Institut für Strahlen- und Kernphysik (Theorie), Nussallee 14-16, D-53115, Bonn, Germany

Received: 8 June 2007
Accepted: 8 June 2007
Published online: 2 July 2007

Abstract

The decays η, $\eta{^\prime}$ → π⁺π^- l ⁺ l ^- (with l = e,μ are investigated within a chiral unitary approach which combines the chiral effective Lagrangian with a coupled-channels Bethe-Salpeter equation. Predictions for the decay widths and spectra are given.

PACS: 13.20.Jf Decays of other mesons – / 12.39.Fe Chiral Lagrangians –

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η, → πl+l- in a chiral unitary approach

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η, $\eta{^\prime}$ → πl⁺l^- in a chiral unitary approach