The φ→ ηπ0γ decay

• Published in: Physics letters. B Vol. 479; no. 1; pp. 53 - 58
• Main Authors: Achasov, M.N., Baru, S.E., Beloborodov, K.I., Berdyugin, A.V., Bozhenok, A.V., Bukin, A.D., Bukin, D.A., Burdin, S.V., Dimova, T.V., Dolinsky, S.I., Druzhinin, V.P., Dubrovin, M.S., Gaponenko, I.A., Golubev, V.B., Ivanchenko, V.N., Korol, A.A., Korostelev, M.S., Koshuba, S.V., Mamutkin, A.A., Pakhtusova, E.V., Pyata, E.E., Salnikov, A.A., Serednyakov, S.I., Shary, V.V., Shatunov, Yu.M., Sidorov, V.A., Silagadze, Z.K., Skrinsky, A.N., Vasiljev, A.V.
• Format: Journal Article
• Language: English
• Published: Elsevier B.V 01.04.2000
• Subjects: Detector; e+e− collisions; Vector meson; 13.65.+i; Vector meson; 13.25.-k; e + e − collisions; Detector; 14.40.-n
• ISSN: 0370-2693; 1873-2445
• DOI: 10.1016/S0370-2693(00)00334-8

Rare radiative decay φ→ ηπ 0 γ was studied with SND detector at VEPP-2M electron-positron collider and its branching ratio was measured: B( φ→ ηπ 0 γ)=(0.88±0.14±0.09)·10 −4. Significant contribution of the a 0(980) γ intermediate state was observed in the decay. The result is based on total integrated luminosity corresponding to 2·10 7 produced φ mesons.