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Anashin, V.V.; Barladyan, A.K.; Barnyakov, A.Yu.; Barnyakov, M.Yu.; Bedny, I.V.; Blinov, A.E.; Bobrov, A.V.; Boborvnikov, V.S.; Buzykaev, A.R.; Glukhovchenko, Yu.M.; Gulevich, V.V.; Gusev, D.V.; Karnaev, S.E.; Karpov, G.V.; Karpov, S.V.; Kiselev, V.A.; Kotov, K.Yu.; Maksimov, D.A.; Malyshev, V.M.; Maslennikov, A.L.; Milstein, A.I.; Mishnev, S.I.; Neufeld, V.V.; Nikitin, S.A.; Okunev, I.N.; Oreshkin, S.B.; Osipov, A.A.; Peleganchuk, S.V.; Piminov, P.A.; Petrov, V.V.; Poluektov, A.O.; Popkov, I.N.; Pospelov, G.E.; Prisekin, V.G.; Ruban, A.A.; Sandyrev, V.K.; Savinov, G.A.; Shamov, A.G.; Shatilov, D.N.; Simonov, E.A.; Sinyatkin, S.V.; Skrinsky, A.N.; Sokolov, A.V.; Sukharev, A.M.; Tayursky, V.A.; Tumaikin, G.M.; Usov, Yu.V.; Vorobiov, A.I.; Yushkov, A.N.; Zhilich, V.N.; Aulchenko, V.M.; Baldin, E.M.; Baru, S.E.; Beloborodova, O.L.; Bogomyagkov, A.V.; Bondar, A.E.; Eidelman, S.I.; Kharlamova, T.A.; Kononov, S.A.; Kravchenko, E.A.; Kulikov, V.F.; Kuper, E.A.; Medvedko, A.S.; Meshkov, O.I.; Morozov, I.I.; Muchnoi, N.Yu.; Nikolaev, I.B.; Orlov, I.O.; Shwartz, B.A.; Skovpen, Yu.I.; Smaluk, V.V.; Starostina, E.V.; Talyshev, A.A.; Telnov, V.I.; Tikhonov, Yu.A.; Todyshev, K.Yu.; Zhulanov, V.V.; Zhuravlev, A.N.; Blinov, V.E.; Kurkin, G.Ya.; Levichev, E.B.; Onuchin, A.P.; Pivovarov, S.G.2010
AbstractAbstract
[en] We present a study of the inclusive photon spectra from 5.9 million J/ψ decays collected with the KEDR detector at the VEPP-4M e+ e- collider. We measure the branching fraction of radiative decay J/ψ → ηc γ, ηc width and mass. Our preliminary results are: M(ηc)=2979.4 ± 1.5 ± 1.9 MeV/c2, Γ(ηc)=27.8±5.1±3.3 MeV, Β(J/ψ → ηc γ)=(2.34 ± 0.15 ± 0.40)%. (authors)
Primary Subject
Source
7 figs., 3 tabs., 8 refs.
Record Type
Journal Article
Journal
Chinese Physics. C, High Energy Physics and Nuclear Physics; ISSN 1674-1137; ; v. 34(6); p. 831-835
Country of publication
Reference NumberReference Number
INIS VolumeINIS Volume
INIS IssueINIS Issue