η, η′ mixing angle and η′ gluonium content extraction from the KLOE Rφ measurement

In this report the extraction of the eta, eta' mixing angle and of the eta' gluonium content from the R(phi) = Br(phi(1020) -> eta'gamma)/Br(phi(1020) -> eta gamma) is updated. The eta' gluonium content is estimated by fitting R(phi), together, with other decay branching ratios. The extracted parameters are: Z(G)(2) = 0.12 +/- 0.04 and phi(P) = (40.4 +/- 0.9).