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

Abstract

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.

8 pages, 2 figures

References in corpus (2)

• eta, eta-prime -> pi^+ pi^- gamma with coupled channels
• The number of colors in the decays pi^0, eta, eta-prime -> gamma gamma

Cited by in corpus (2)

• A new determination of the $\gamma \pi \to \pi \pi$ anomalous amplitude via ${\pi }^{-}{e}^{-}\to {\pi }^{-}{e}^{-}{\pi }^0$ data
• Properties of the vector meson nonet at large N_c beyond the chiral limit