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ISSN - 10637761, EISSN - 10906509, Journal of Experimental and Theoretical Physics, 2000, vol. 90, p. 927-938

The process e+e- → ωπ0 near the φ resonance

Aulchenko V. M., Achasov M. N., Beloborodov K. I., Berdyugin A. V., Bogdanchikov A. G., Bozhenok A. V., Bukin A. D., Bukin D. A., Burdin S. V., Vasiljev A. V., Gaponenko I. A., Golubev V. B., Dimova T. V., Drozdetsky A. A., Druzhinin V. P., Dubrovin M. S., Ivanov P. M., Ivanchenko V. N., Koop I. A., Korol A. A., Koshuba S. V., Kukartsev G. A., Lysenko A. P., Otboev A. V., Pakhtusova E. V., Salnikov A. A., Serednyakov S. I., Sidorov V. A., Silagadze Z. K., Skrinsky A. N., Shary V. V., Shatunov Yu M.

The reaction e+e- → ωπ0 near a φ resonance was studied with a spherical neutral detector at VEPP-2M e+e- collider. Both main modes of decay of a ω meson were investigated: ω → π+π-π0 and ω → π0γ. The probability of decay φ → ωπ0 was obtained from the magnitude of the interference wave in the cross section for the reaction e+e- → ωπ0 → π+π-π0π0: B(φ → ωπ0) = (5.5-1.4 +1.6 ± 0.3) × 10-5. The ratio of the partial widths of the ω meson was obtained from the ratio of the cross sections for the two modes: Γ(ω → π0γ)/Γ(ω → π+π-π0) = 0.0994 ± 0.0036 ± 0.0038. © 2000 MAIK "Nauka/Interperiodica".