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Akhmetshin, R.R.; Amirkhanov, A.N.; 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.; Gribanov, S.S.; Grigoriev, D.N.; Ignatov, F.V.; Ivanov, V.L.; Karpov, S.V.; Kasaev, A.S.; Kazanin, V.F.; Koop, I.A.; Kovalenko, O.A.; Korobov, A.A.; Kozyrev, A.N.; Kozyrev, E.A.; Krokovny, P.P.; Kuzmenko, A.E.; Kuzmin, A.S.; Logashenko, I.B.; Lysenko, A.P.; Lukin, P.A.; Mikhailov, K.Yu; Okhapkin, V.S.; Pestov, Yu.N.; Perevedentsev, E.A.; Popov, A.S.; Razuvaev, G.P.; Rogovsky, Yu.A.; 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, Yu.M.; Solodov, E.P.; Titov, V.M.; Talyshev, A.A.; Vorobiov, A.I.; Yudin, Yu.V.
Physics letters. B, 05/2017, Volume: 768, Issue: CJournal Article
A cross section of the process e+e−→π+π−π+π− has been measured using 6798±93 signal events from a data sample corresponding to an integrated luminosity of 9.8 pb−1 collected with the CMD-3 detector in the center-of-mass energy range 920–1060 MeV. The measured cross section exhibits a pattern of interference of the ϕ(1020)→π+π−π+π− decay with a non-resonant process e+e−→π+π−π+π−, from which we obtain the branching fraction of the doubly suppressed decays (by G-parity and OZI rule): B(ϕ→π+π−π+π−)=(6.5±2.7±1.6)×10−6.
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