Study of the $\rho$, $\omega$, $\varphi \to \eta \gamma \to 7\gamma$ Decays with an SND Detector on a VEPP-2M Collider

Abstract

The $e^{+}{e}^{-}\to \eta \gamma \to 7\gamma$ process was studied in the energy range $2E=600÷1060$ MeV with an SND detector on a VEPP-2M $e^{+}{e}^{-}$ collider. The decay branching ratios $B(\varphi \to \eta \gamma )=(1.343\pm 0.012\pm 0.055)\cdot 10^{-2}$, $B(\omega \to \eta \gamma )=(4.60\pm 0.72\pm 0.19)\cdot 10^{-4}$, and $B(\rho \to \eta \gamma )=(2.69\pm 0.32\pm 0.16)\cdot 10^{-4}$ were measured.

5 pages, 4 figures