The box anomaly and radiative decays of η(η')-mesons

Details The box anomaly and radiative decays of η(η')-mesons The box anomaly and radiative decays of η(η')-mesons

1997-10-28

arxiv.org/abs/hep-ph/9710514v1

Physics

High Energy Physics

High Energy Physics - Phenomenology

22 pages, Latex, 10 PS figures

Scientific paper

We report on a confined quark model calculation of the transition form factors for the radiative decays of \eta(\eta')->\gamma l^+l^- and \eta(\eta')->\gamma\pi^+\pi^-. The \eta-\eta' mixing angle \theta_P is determined from the set of data on the electromagnetic \eta(\eta') decays. It is found that \theta_P\sim -16.5. The analysis of the dipionic mass distribution in the decay \eta'->\gamma\pi^+\pi^- confirms the existence of a non-resonant contribution which is the box anomaly.

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