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ISSN - 14346044, EISSN - 14346052, European Physical Journal C, 2000, vol. 12, p. 25-33

Experimental study of the processes e+e- → φ → ηγ, π0γ at VEPP-2M

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., Korol A. A., Koshuba S. V., Pakhtusova E. V., Salnikov A. A., Serednyakov S. I., Shary V. V., Shatunov Yu M., Sidorov V. A., Silagadze Z. K.

The processes e+e- → ηγ, π0γ → 3γ were studied in the SND experiment at the VEPP-2M collider in the energy region of the φ meson. The branching ratios obtained in this study are Br(φ → ηγ) = (1.338 ± 0.012 ± 0.052)% and Br(φ → π0γ) = (1.226 ± 0.036+0.096 -0.089) × 10-3. A comparison of the experimental data with different theoretical models was performed.