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Eta' gluonic content and J/psi->VP decays Escribano, Rafel Institut de Física d'Altes Energies Talk presented at the International Workshop on e+e- collisions from Phi to Psi (PHIPSI08), Laboratori Nazionali di Frascati (Rome), Italy, 7-10 April 2008 Altres ajuts: this work has been supported in part under the EU Contract No. MRTN-CT-2006-035482 "FLAVIAnet" The η- pseudoscalar mixing angle and the gluonium content of the meson are deduced from an updated phenomenological analysis of decays into a vector and a pseudoscalar meson. In absence of gluonium, the value of the mixing angle in the quark-flavour basis is found to be. In presence of gluonium, the values for the mixing angle and the gluonic content of the wave function are and, respectively. Corrections due to non-ideal ω-ϕ mixing are shown to be negligible. The newly reported values of by the BABAR and BES Collaborations are crucial to get a consistent description of data 2008 Article Ministerio de Educación y Ciencia FPA2005-02211 Ministerio de Educación y Ciencia CSD2007-00042 Agència de Gestió d'Ajuts Universitaris i de Recerca 2005/SGR-00994 Nuclear Physics B - Proceedings Supplements ; Vol. 181-182 (Sep. 2008), p. 226-230 open access Aquest document està subjecte a una llicència d'ús Creative Commons. Es permet la reproducció total o parcial, la distribució, i la comunicació pública de l'obra, sempre que no sigui amb finalitats comercials, i sempre que es reconegui l'autoria de l'obra original. No es permet la creació d'obres derivades. https://creativecommons.org/licenses/by-nc-nd/4.0/