Abstract
A phenomenological analysis of radiative V → Pγ and P→Vγ decays is performed with the purpose of determining the gluonic content of the η and η' wave functions. Our results show that within our model there is no evidence for a gluonium contribution in the η, Zη2 = 0.00 ± 0.12, or the η', Zη'2 = 0.04 ± 0.09. In terms of a mixing angle description this corresponds to ϕP = (41.4 ± 1.3)° and |ϕη'G| = (12 ± 13)°. In addition, the η-η' mixing angle is found to be ϕP = (41.5 ± 1.2)° if we don't allow for a gluonium component.
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