Eta' gluonic content and J/psi->VP decays

Abstract

The $\eta$-${\eta }^{\prime }$ pseudoscalar mixing angle and the gluonium content of the ${\eta }^{\prime }$ meson are deduced from an updated phenomenological analysis of $J/\psi$ decays into a vector and a pseudoscalar meson. The values for the mixing angle and the gluonic content of the ${\eta }^{\prime }$ wave function are ${\varphi }_P=(44.5\pm 4.3{)}^{\circ }$ and $Z_{{\eta }^{\prime }}^2=0.28\pm 0.21$, respectively.

5 pages, uses espcrc2 style. 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

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Cited by in corpus (2)

• Boost operators in Coulomb-gauge QCD: the pion form factor and Fock expansions in phi radiative decays
• Pseudoscalar mixing in J/psi and psi(2S) decay