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ISSN - 03702693, Physics Letters, Section B: Nuclear, Elementary Particle and High-Energy Physics, 2011, vol. 695, p. 412-418

Measurement of Φ(1020) meson leptonic width with CMD-2 detector at VEPP-2M collider

Akhmetshin R. R., Aulchenko V. M., Banzarov V. Sh, Barkov L. M., Baru S. E., Bashtovoy N. S., Bondar A. E., Bragin A. V., Eidelman S. I., Epifanov D. A., Fedotovich G. V., Gabyshev N. I., Grebenuk A. A., Grigoriev D. N., Ignatov F. V., Karpov S. V., Kazanin V. F., Khazin B. I., Koop I. A., Krokovny P. P., Kuzmin A. S., Logashenko I. B., Lukin P. A., Lysenko A. P., Mikhailov K. Yu, Okhapkin V. S., Perevedentsev E. A., Popov A. S., Redin S. I., Ruban A. A., Ryskulov N. M., Shatunov Yu M., Shwartz B. A., Sibidanov A. L., Snopkov I. G., Solodov E. P., Yudin Yu V., Zaitsev A. S.

The Φ(1020) meson leptonic width has been determined from the combined analysis of 4 major decay modes of the resonance (Φ→K+K-,KL 0KS 0,+π+π-π0,ηγs) studied with the CMD-2 detector at the VEPP-2M e+e+e- collider. The following value has been obtained: -(Φ→e+e+e-)=1.235±0.006±0.022 keV. The Φ(1020) meson parameters in four main decay channels have been also recalculated: B(Φ→K+K+K-)=0.493±0.003±0.007, B(Φ→KLKS)=0.336±0.002±0.006, B(Φ→π+π-π0)=0.155±0.002±0.005, B(Φ→ηγ)=0.0138±0.0002±0.0002. © 2010 Elsevier B.V.