ar X iv : 0 71 2 . 42 46 v 1 [ he p - ph ] 2 7 D ec 2 00 7 Υ ( 1 s ) → γ ( η ′ , η ) Decays Bing
نویسنده
چکیده
The decays of Υ(1s) → γ(η, η) are studied by an approach which has successfully predicted the ratio Γ(J/ψ→γη ) Γ(J/ψ→γη) . Strong dependence on quark mass has been found in the decays (J/ψ,Υ(1s)) → γ(η, η). Very small decay rates of Υ(1s) → γ(η, η) are
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