Two photon decay of the pseudoscalars, the extrapolation to the mass-shell

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  • 29 June 2001
Abstract
The extrapolation of the decay amplitude of the pseudoscalar mesons into two photons from the soft meson limit where it is obtained from the axial anomaly to the mass-shell involves the contribution of the O ^ - continuum. The corrections to the soft-meson limit are estimated. Despite the large values of the eta and eta prime masses the results for f_8 / f_pi and f_0 / f_pi remain consistent with those obtained from chiral perturbation theory.

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