On Radiative $\varphi \to \eta \gamma$, $\varphi \to {\eta }^{\prime }\gamma$ Decays

Fulvia De Fazio, M. R. Pennington

We use QCD sum-rules to study the decays $\varphi \to \eta \gamma$ and $\varphi \to {\eta }^{\prime }\gamma$, obtaining $\mathcal{B}(\varphi \to \eta \gamma )=(1.15\pm 0.2)10^{-2}$ and ${\cal B}(ϕ\to η^\prime γ)=(1.18 \pm 0.4) 10^{-4}…