%0 Journal Article
%T On Radiative $¦Õ\to ¦Ç¦Ã$, $¦Õ\to ¦Ç^\prime ¦Ã$ Decays
%A Fulvia De Fazio
%A M. R. Pennington
%J Physics
%D 2000
%I arXiv
%X We use QCD sum-rules to study the decays $\phi \to \eta \gamma$ and $\phi \to \eta^\prime \gamma$, obtaining ${\cal B}(\phi \to \eta \gamma)=(1.15 \pm 0.2) 10^{-2}$ and ${\cal B}(\phi \to \eta^\prime \gamma)=(1.18 \pm 0.4) 10^{-4}$, in very good agreement with existing experimental data. We also discuss the issue of $\eta-\eta^\prime$ mixing, predicting the $\eta$ and $\eta^\prime$ decay constants in a mixing scheme in the quark-flavour basis.
%U http://arxiv.org/abs/hep-ph/0007260v2