2023 Impact factor 4.2
Particles and Fields
Eur. Phys. J. C 7, 271-278
DOI 10.1007/s100529801009

The $\eta$-$\eta\prime$ mixing angle revisited

A. Bramon1 - R. Escribano2 - M.D. Scadron3

1 Departament de Física, Universitat Autònoma de Barcelona, E-08193 Bellaterra (Barcelona), Spain
2 Service de Physique Théorique, Université Libre de Bruxelles, CP 225, B-1050 Bruxelles, Belgium
3 Physics Department, University of Arizona, Tucson, AZ 85721, USA

Received: 14 May 1998 / Published online: 6 November 1998

The value of the $\eta$-$\eta\prime$ 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 the present experimental evidence and the average $\theta_P=-15.5^\circ\pm 1.3^\circ$ seems to be favoured.

Copyright Springer-Verlag