eta, eta-prime -> pi^+ pi^- gamma with coupled channels

Details eta, eta-prime -> pi^+ pi^- gamma with coupled channels eta, eta-prime -> pi^+ pi^- gamma with coupled channels

2004-05-05

arxiv.org/abs/hep-ph/0405039v1

Nucl.Phys. A740 (2004) 362-382

Physics

High Energy Physics

High Energy Physics - Phenomenology

21 pages, 11 figures

Scientific paper

10.1016/j.nuclphysa.2004.05.006

The decays eta, eta-prime -> pi^+ pi^- gamma are investigated within an approach that combines one-loop chiral perturbation theory with a coupled channel Bethe-Salpeter equation which satisfies unitarity constraints and generates vector mesons dynamically from composite states of two pseudoscalar mesons. It is furthermore shown that the inclusion of the eta-prime as a dynamical degree of freedom does not renormalize the Wess-Zumino-Witten term.

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