eta, eta ' mixing angle and eta ' gluonium content extraction from the KLOE R(phi) 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)