Mixing of eta-eta' Mesons in J/psi Decays into a Vector and a Pseudoscalar Meson

Research paper by A. Bramon, R. Escribano, M. D. Scadron

Indexed on: 13 Mar '97Published on: 13 Mar '97Published in: High Energy Physics - Phenomenology


The octet-singlet mixing angle $\theta_P$ in the pseudoscalar meson nonet is deduced from the rich set of accurate data on $J/\psi$ decays into a vector and a pseudoscalar meson. Corrections due to non-ideal $\omega$-$\phi$ mixing have been included for the first time and turn out to be crucial to find $\theta_P = -16.9 \pm 1.7$ degrees, which is appreciably less negative than previous results coming from similar analyses.