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arXiv · hep-ph/9703313

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

A. Bramon·R. Escribano·M. D. Scadron
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Abstract

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

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A. Bramon, R. Escribano, M. D. Scadron. 1997-03-13. Mixing of eta-eta' Mesons in J/psi Decays into a Vector and a Pseudoscalar Meson. https://doi.org/10.1016/s0370-2693(97)00508-x

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