Evidence of the φ→ηπ0γ decay
/ Authors
M. Achasov, V. Aulchenko, S. Baru, A. Berdyugin, A. Bozhenok, A. Bukin, D. Bukin, S. Burdin, T. Dimova, S. Dolinski
and 18 more authors
V. Druzhinin, M. Dubrovin, I. Gaponenko, V. Golubev, V. Ivanchenko, P. Ivanov, A. Korol, S. Koshuba, A. Lysenko, E. Pakhtusova, A. Salnikov, S. Serednyakov, V. Shary, Y. Shatunov, V. A. Sidorov, Z. Silagadze, A. Skrinsky, Y. Usov
/ Abstract
Abstract Signal of the rare radiative decay φ → ηπ 0 γ was observed in the SND experiment at VEPP-2M electron-positron collider. The result is based on the analysis of data, corresponding to a total integrated luminosity of 4 pb −1 , or 8·10 6 φ -mesons produced. The measured branching ratio of φ → ηπ 0 γ decay is equal to (0.83±0.23)·10 −4 .
Journal: Physics Letters B