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ISSN - 03702693, Physics Letters, Section B: Nuclear, Elementary Particle and High-Energy Physics, 2000, vol. 476, p. 33-39

Measurement of ω meson parameters in π+ π- π0 decay mode with CMD-2

Akhmetshin R. R., Anashkin E. V., Aulchenko V. M., Banzarov V. Sh, Barkov L. M., Baru S. E., Bashtovoy N. S., Bondar A. E., Bondarev D. V., Chernyak D. V., Eidelman S. I., Fedotovich G. V., Gabyshev N. I., Grebeniuk A. A., Grigoriev D. N., Khazin B. I., Koop I. A., Kurdadze L. M., Kuzmin A. S., Logashenko I. B., Lukin P. A., Lysenko A. P., Nesterenko I. N., Okhapkin V. S., Perevedentsev E. A., Polunin A. A., Purlatz T. A., Root N. I., Ruban A. A., Ryskulov N. M., Shamov A. G., Shatunov Yu M., Shekhtman A. I., Sher A. E., Shwartz B. A., Sidorov V. A., Skrinsky A. N., Smakhtin V. P., Snopkov I. G., Solodov E. P., Stepanov P. Yu, Sukhanov A. I., Titov V. M., Valishev A. A., Yudin Yu V., Zverev S. G., Thompson J. A., Dhawan S. K., Hughes V. W.

About 11 200 e+ e- → ω → π+ π- π0 events selected in the center of mass energy range from 760 to 810 MeV were used for the measurement of the ω meson parameters. The following results have been obtained: σ0 = (1457 ± 23 ± 19) nb, m(ω) = (782.71 ± 0.07 ± 0.04) MeV/c2, Γ(ω) = (8.68 ± 0.23 ± 0.10) MeV, Γ(e)+((e)- · Br(ω → π+ π- π0) = (0.528 ± 0.012 ± 0.007) · 10-3 MeV. (C) 2000 Published by Elsevier Science B.V.