The ϕηπ0γ decay
M. N. Achasov, S. E. Baru, K. I. Beloborodov, A. V. Berdyugin, A. V. Bozhenok, A. D. Bukin, D. A. Bukin, S. V. Burdin, T. V. Dimova, S. I. Dolinsky, V. P. Druzhinin, M. S. Dubrovin, I. A. Gaponenko, V. B. Golubev, V. N. Ivanchenko, A. A. Korol, M. S. Korostelev, S. V. Koshuba, A. A. Mamutkin, E. V. Pakhtusova, E. E. Pyata, A. A. Salnikov, S. I. Serednyakov, V. V. Shary, Yu. M. Shatunov, V. A. Sidorov, Z. K. Silagadze, A. N. Skrinsky, A. V. Vasiljev
Abstract
Rare radiative decay ϕηπ0γ was studied with SND detector at VEPP-2M electron-positron collider and its branching ratio was measured: B(ϕηπ0γ)=(0.880.140.09)· 10-4. Significant contribution of the a0(980)γ intermediate state was observed in the decay. The result is based on total integrated luminosity corresponding to 2·107 produced ϕ mesons.
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