Can one see the number of colors in eta, eta-prime --> pi^+ pi^- gamma?

Details Can one see the number of colors in eta, eta-prime --> pi^+ pi^- gamma? Can one see the number of colors in eta, eta-prime --> pi^+ pi^- gamma?

2004-10-10

arxiv.org/abs/hep-ph/0410141v1

Phys.Rev. D71 (2005) 014027

Physics

High Energy Physics

High Energy Physics - Phenomenology

8 pages, 2 figures

Scientific paper

10.1103/PhysRevD.71.014027

We investigate the decays eta, eta-prime --> pi^+ pi^- gamma up to next-to-leading order in the framework of the combined 1/N_c and chiral expansions. Counter terms of unnatural parity at next-to-leading order with unknown couplings are important to acommodate the results both to the experimental decay width and the photon spectrum. The presence of these coefficients does not allow for a determination of the number of colors from these decays.

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