The $η- η'$ Mixing Angle Revisited

Details The $η- η'$ Mixing Angle Revisited The $η- η'$ Mixing Angle Revisited

1997-11-04

arxiv.org/abs/hep-ph/9711229v2

Eur.Phys.J.C7:271-278,1999

Physics

High Energy Physics

High Energy Physics - Phenomenology

17 pages, LaTeX. 2 references added, some comments on Chiral Perturbation Theory

Scientific paper

10.1007/s100529801009

The value of the $\eta - \eta'$ mixing angle $\theta_P$ is phenomenologically deduced from a rather exhaustive and up-to-date analysis of data including strong decays of tensor and higher-spin mesons, electromagnetic decays of vector and pseudoscalar mesons, $J/\psi$ decays into a vector and a pseudoscalar meson, and other transitions. A value of $\theta_P$ between $-17^\circ$ and $-13^\circ$ is consistent with all the present experimental evidence and the average $\theta_P=-15.5^\circ\pm 1.3^\circ$ seems to be favoured.

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