Issue ofψ→γη,γη’ decays andη-η’ mixing
- 1 March 1989
- journal article
- research article
- Published by American Physical Society (APS) in Physical Review D
- Vol. 39 (5) , 1353-1356
- https://doi.org/10.1103/physrevd.39.1353
Abstract
The issue of the ratio R=Γ(ψ→γη’)/Γ(ψ→γη) and the η-η’ mixing angle θ is discussed in an approach on the basis of chiral and large- arguments. Gluonic matrix elements 〈0‖GG̃‖η(η’)〉 are estimated. θ≃-20° is found to be strongly favored over θ≃-10°, and is in agreement with the experimental value of R.
Keywords
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