Two schemes ofη?η′-mixing |
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Authors: | A V Kisselev V A Petrov |
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Institution: | 1. International Centre for Theoretical Physics, I-34100, Trieste, Italy 3. CERN, CH-1211, Geneva 23, Switzerland
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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. |
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