On the gluon content of the η and η′ mesons

A phenomenological analysis of radiative V -> P gamma and P -> V gamma decays is performed with the purpose of determining the gluonic content of the eta and eta' wave functions. Our results show that within our model there is no evidence for gluonium contribution in the eta, Z(eta)(2) - 0.00 +/- 0.12, or the eta', Z(eta')(2) = 0.04 +/- 0.09. In terms of a mixing angle description this corresponds to phi(P) = (41.1 +/- 1.3)degrees and vertical bar phi(eta'G)vertical bar = (12 +/- 13)degrees. In addition, the eta-eta' mixing angle is found to be phi(P) = (41.5 +/- 1.2)degrees if we dont allow for a gluonium component.