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ISSN - 03702693, Physics Letters, Section B: Nuclear, Elementary Particle and High-Energy Physics, 2000, vol. 485, p. 349-356

The φ(1020) → π0π0γ decay

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., Drozdetsky A. A., Druzhinin V. P., Dubrovin M. S., Gaponenko I. A., Golubev V. B., Ivanchenko V. N., Korol A. A., Koop I. A., Koshuba S. V., Kukartsev G. A., Mamutkin A. A., Pakhtusova E. V., Salnikov A. A., Serednyakov S. I., Shary V. V., Shatunov Yu M., Sidorov V. A., Silagadze Z. K., Skrinsky A. N., Valishev A. A., Vasiljev A. V.

In the SND experiment at VEPP-2M e+e- collider the φ(1020) →π0π0γ decay was studied and its branching ratio was measured: B(φ → π0π0γ) = (1.221 ± 0.098 ± 0.061) · 10-4. It was shown, that f0(980)γ intermediate state dominates in this decay and the f0(980)-meson parameters were obtained. (C) 2000 Elsevier Science B.V.