Study of the $\rho$, $\omega$, $\phi\to\eta\gamma\to 7\gamma$ Decays   with an SND Detector on a VEPP-2M Collider
  The $e^+e^-\to\eta\gamma\to 7\gamma$ process was studied in the energy range $2E=600\div 1060$ MeV with an SND detector on a VEPP-2M $e^+e^-$ collider. The decay branching ratios $B(\phi\to\eta\gamma)=(1.343\pm 0.012\pm 0.055)\cdot 10^{-2}$, $B(\omega\to\eta\gamma)=(4.60\pm 0.72\pm 0.19)\cdot 10^{-4}$, and $B(\rho\to\eta\gamma)=(2.69\pm 0.32\pm 0.16)\cdot 10^{-4}$ were measured. 
M.N.Achasov, S.E.Baru, K.I.Beloborodov, A.V.Berdyugin, A.V.Bozhenok,   A.G.Bogdanchikov, D.A.Bukin, S.V.Burdin, A.V.Vasiljev...