The $\varphi \to \eta {\pi }^0\gamma$ decay

M. N. Achasov, S. E. Baru, K. I. Beloborodov +26

Rare radiative decay $\varphi \to \eta {\pi }^0\gamma$ was studied with SND detector at {VEPP-2M} electron-positron collider and its branching ratio was measured: $B(ϕ\toηπ^0γ)=(0.88\pm0.14\pm0.09)\cdot…