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ISSN - 03702693, Physics Letters, Section B: Nuclear, Elementary Particle and High-Energy Physics, 2001, vol. 509, p. 217-226

Study of the process e+e- → ηγ in c.m. energy range 600-1380 MeV at CMD-2

Akhmetshin R. R., Anashkin E. V., Aulchenko V. M., Banzarov V. Sh, Baratt A., Barkov L. M., Baru S. E., Bashtovoy N. S., Bondar A. E., Bondarev D. V., Bragin A. V., Chernyak D. V., Eidelman S. I., Fedotovitch G. V., Gabyshev N. I., Grebeniuk A. A., Grigoriev D. N., Hughes V. W., Ignatov F. V., Karpov S. V., Kazanin V. F., Khazin B. I., Koop I. A., Krokovny P. P., Kurdadze L. M., Kuzmin A. S., Logashenko I. B., Lukin P. A., Lysenko A. P., Mikhailov K. Yu, Milstein A. I., Nesterenko I. N., Okhapkin V. S., Otboev A. V., Perevedentsev E. A., Popov A. S., Root N. I., Ruban A. A., Ryskulov N. M., Shamov A. G., Shatunov Yu M., Shwartz B. A., Sibidanov A. L., Sidorov V. A., Skrinsky A. N., Smakhtin V. P., Snopkov I. G., Solodov E. P., Stepanov P. Yu, Sukhanov A. I., Thompson J. A., Valishev A. A., Yudin Yu V., Zverev S. G.

The cross section of the process e+e- → ηγ has been measured in the 600-1380 MeV c.m. energy range with the CMD-2 detector. The following branching ratios have been determined: B(ρ → ηγ) = (3.28 ± 0.37 ± 0.23) × 10-4, B(ω → ηγ) = (5.10 ± 0.72 ± 0.34) × 10-4, B(φ → ηγ) = (1.287 ± 0.013 ± 0.063) × 10-2. Evidence for the ρ (1450) → ηγ decay has been obtained for the first time. © 2001 Elsevier Science B.V.