Signal of the rare radiative decay PHI--->ETA+PI0+GAMMA 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 8x10^6 PHI mesons produced. The measured branching ratio of PHI--->ETA+PI0+GAMMA decay is equal to (0.83+-0.23)x10^{-4}.
Cite
@article{arxiv.hep-ex/9809010,
title = {Evidence of the PHI(1020)--->ETA+PI0+GAMMA Decay},
author = {M. N. Achasov and V. M. Aulchenko and S. E. Baru and A. V. Berdyugin and A. V. Bozhenok A. D. Bukin and D. A. Bukin and S. V. Burdin and T. V. Dimova and S. I. Dolinski and V. P. Druzhinin and M. S. Dubrovin and I. A. Gaponenko and V. B. Golubev and V. N. Ivanchenko and P. M. Ivanov and A. A. Korol and S. V. Koshuba and A. P. Lysenko and E. V. Pakhtusova and A. A. Salnikov and S. I. Serednyakov and V. V. Shary and Yu. M. Shatunov and V. A. Sidorov and Z. K. Silagadze and A. N. Skrinsky and Yu. V. Usov},
journal= {arXiv preprint arXiv:hep-ex/9809010},
year = {2008}
}