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Two schemes ofη?η′-mixing
Authors:A V Kisselev  V A Petrov
Institution:1. International Centre for Theoretical Physics, I-34100, Trieste, Italy
3. CERN, CH-1211, Geneva 23, Switzerland
Abstract:Proceeding from the expansion of composite operators in interpolating hadronic fields, the width of the decays η(η′)→γγ andJ/ψ→η(η′)γ have been calculated. Two mechanisms of pseudoscalar field mixing (“mass-mixing” and “current-mixing”) are considered. In the given schemes, the values of η?η′-mixing angle θ p are, respectively, (?15.0±1.8)o and (?19.7±2.2)o.
Keywords:
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