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Akhmetshin, R.R.; Anashkin, E.V.; Arpagaus, M.; Aulchenko, V.M.; Banzarov, V.Sh; Barkov, L.M.; 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.; Ivanov, P.M.; Karpov, S.V.; Kazanin, V.F.; Khazin, B.I.; Koop, I.A.; Krokovny, P.P.; Kurdadze, L.M.; Kuzmin, A.S.; Lechner, M.; Logashenko, I.B.; Lukin, P.A.; Mikhailov, K.Yu; Nesterenko, I.N.; Okhapkin, V.S.; Otboev, A.V.; Perevedentsev, E.A.; Popov, A.S.; Purlatz, T.A.; 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.; Titov, V.M.; Valishev, A.A.; Yudin, Yu.V.; Zverev, S.G.
Physics letters. B, 03/2001, Letnik: 501, Številka: 3Journal Article
Using 15.1 pb −1 of data collected by CMD-2 in the φ-meson energy range, the branching ratios of the following conversion decays have been measured: B( φ→ ηe + e −)=(1.14±0.10±0.06)×10 −4, B( η→ e + e − γ)=(7.10±0.64±0.46)×10 −3, B( η→ π + π − e + e −)=(3.7 +2.5 −1.8±0.3)×10 −4. The upper limits for the following rare conversion decays have been obtained at the 90% confidence level: B( φ→ ημ + μ −)<9.4×10 −6, B( η→ e + e − e + e −)<6.9×10 −5.
