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Upsilon(1s)-->γ(η',η) decays
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Upsilon(1s)-->γ(η',η) decays
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The decays of $\Upsilon(1s)\to\gamma(\eta',\eta)$ are studied by an approach which has successfully predicted the ratio $\frac{\Gamma(J/\psi\to\gamma\eta')}{\Gamma(J/\psi\to\gamma\eta)}$. Strong dependence on quark mass has been found in the decays $(J/\psi, \Upsilon(1s))\to\gamma(\eta',\eta)$. Very small decay rates of $\Upsilon(1s)\to\gamma(\eta',\eta)$ are predicted.
Forward citations
Cited by 1 Pith paper
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Radiative decays $J/\psi,\,\psi(2S)\rightarrow\gamma\eta^{(\prime)}$ in perturbative QCD with relativistic corrections
Order-q² relativistic corrections in pQCD roughly double J/ψ→γη(') rates and favor a smaller mixing angle, while ψ(2S) rates overshoot data and may require coherent ηc mixing.
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