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Akhmetshin, R.R.; Anisenkov, A.V.; Aulchenko, V.M.; Banzarov, V.Sh; Bashtovoy, N.S.; Berkaev, D.E.; Bondar, A.E.; Bragin, A.V.; Eidelman, S.I.; Epifanov, D.A.; Epshteyn, L.B.; Erofeev, A.L.; Fedotovich, G.V.; Gayazov, S.E.; Grebenuk, A.A.; Grigoriev, D.N.; Gromov, E.N.; Ignatov, F.V.; Karpov, S.V.; Kazanin, V.F.; Khazin, B.I.; Koop, I.A.; Kovalenko, O.A.; Kozyrev, A.N.; Kozyrev, E.A.; Krokovny, P.P.; Kuzmenko, A.E.; Kuzmin, A.S.; Logashenko, I.B.; Lukin, P.A.; Mikhailov, K.Yu; Muchnoi, N.Yu; Okhapkin, V.S.; Pestov, Yu.N.; Perevedentsev, E.A.; Popov, A.S.; Razuvaev, G.P.; Rogovsky, Yu.A.; Romanov, A.L.; Ruban, A.A.; Ryskulov, N.M.; Ryzhenenkov, A.E.; Shebalin, V.E.; Shemyakin, D.N.; Shwartz, B.A.; Shwartz, D.B.; Sibidanov, A.L.; Shatunov, P.Yu; Shatunov, Yu.M.; Solodov, E.P.; Titov, V.M.; Talyshev, A.A.; Vorobiov, A.I.; Yudin, Yu.V.
Physics letters. B, 01/2015, Volume: 740Journal Article
A search for the process e+e−→η′(958) in the π+π−η→π+π−γγ final state has been performed with the CMD-3 detector at the VEPP-2000 e+e− collider. Using an integrated luminosity of 2.69 pb−1 collected at the center-of-mass energy Ec.m.=957.68 MeV we set an upper limit for the product of electronic width and branching fractions Γη′(958)→e+e−⋅Bη′(958)→π+π−η⋅Bη→γγ<0.00041 eV at 90% C.L.
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