Study of the process $e^{+}{e}^{-}\to \eta \gamma \to 7\gamma$ in the energy range $\sqrt{s}$ = 1.07 -- 2 GeV

SND Collaboration, M. N. Achasov, A. Yu. Barnyakov +35

The $e^{+}{e}^{-}\to \eta \gamma$ cross section is measured in the center-of-mass energy range from 1.07 to 2.00 GeV in the decay channel $\eta \to 3{\pi }^0$, ${\pi }^0\to \gamma \gamma$. The data set with an integrated l…