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ISSN - 03702693, Physics Letters, Section B: Nuclear, Elementary Particle and High-Energy Physics, 1998, vol. 436, p. 199-203

Search for the decay φ → ηπ0π0γ

Aulchenko V. M., Achasov M. N., Berdyugin A. V., Bozhenok A. V., Bukin D. A., Burdin S. V., Dimova T. V., Druzhinin V. P., Dubrovin M. S., Gaponenko I. A., Golubev V. B., Ivanchenko V. N., Ivanov P. M., Korol A. A., Koshuba S. V., Pakhtusova E. V., Pyata E. E., Shary V. V., Serednyakov S. I., Shatunov Yu M., Sidorov V. A., Silagadze Z. K., Usov Yu V., Mamutkin A. A.

In the experiment with the SND detector at the e+e- collider VEPP-2M the search was performed for the decay φ → ηπ0π0γ. The following upper limits at 90% confidence level were placed: Br(φ → η′(958)γ) < 1.1 · 10-4, Br(φ → ηπ0π0γ) < 2 · 10-5 (incl. η′γ). © 1998 Published by Elsevier Science B.V. All rights reserved.