ISSN - 03702693, Physics Letters, Section B: Nuclear, Elementary Particle and High-Energy Physics, 1998, vol. 438, p. 441-445
Evidence of the φ → ηπ0γ decay
Signal of the rare radiative decay φ → ηπ0γ 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 4pb-1, or 8 · 106 φ-mesons produced. The measured branching ratio of φ → ηπ0γ decay is equal to (0.83 ± 0.23) · 10-4. © 1998 Published by Elsevier Science B.V. All rights reserved.