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Abstract: The $\eta$-$\eta^\prime$ mixing angle is deduced from an updatedphenomenological analysis of $J-\psi$ decays into a vector and a pseudoscalarmeson. Corrections due to non-ideal $\omega$-$\phi$ mixing are confirmed to becrucial to find $\theta P=-16.9\pm 1.7^\circ$, in agreement with most recentanalyses. The newly reported values of $BJ-\psi\to ho\pi$ by the BABAR andBES Collaborations make more difficult a reasonable description of data.



Autor: Rafel Escribano UAB and IFAE, Barcelona

Fuente: https://arxiv.org/







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