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arxiv: 2211.13520 · v4 · pith:2GDEP4FS · submitted 2022-11-24 · hep-ex

Measurement of the branching fraction of J/psirightarrowrhoπ at KEDR

V.V. Anashin , O.V. Anchugov , A.V. Andrianov , K.V. Astrelina , V.M. Aulchenko , E.M. Baldin , G.N. Baranov , A.K. Barladyan
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A.Yu. Barnyakov M.Yu. Barnyakov I.Yu. Basok A.M. Batrakov E.A. Bekhtenev O.V. Belikov D.E. Berkaev A.E. Blinov V.E. Blinov M.F. Blinov A.V. Bobrov V.S. Bobrovnikov A.V. Bogomyagkov D.Yu. Bolkhovityanov A.E. Bondar A.R. Buzykaev P.B. Cheblakov V.L. Dorohov F.A. Emanov V.V. Gambaryan D.N. Grigoriev V.V. Kaminskiy S.E. Karnaev G.V. Karpov S.V. Karpov K.Yu. Karukina D.P. Kashtankin P.V. Kasyanenko A.A. Katcin T.A. Kharlamova V.A. Kiselev S.A. Kononov A.A. Krasnov E.A. Kravchenko V.N. Kudryavtsev V.F. Kulikov I.A. Kuyanov E.B. Levichev P.V. Logachev D.A. Maksimov Yu.I. Maltseva V.M. Malyshev A.L. Maslennikov O.I. Meshkov S.I. Mishnev I.A. Morozov I.I. Morozov D.A. Nikiforov S.A. Nikitin I.B. Nikolaev I.N. Okunev S.B. Oreshkin A.A. Osipov I.V. Ovtin A.V. Pavlenko S.V. Peleganchuk P.A. Piminov N.A. Podgornov V.G. Prisekin O.L. Rezanova A.A. Ruban G.A. Savinov A.G. Shamov L.I. Shekhtman D.A. Shvedov B.A. Shwartz E.A. Simonov S.V. Sinyatkin A.N. Skrinsky A.V. Sokolov E.V. Starostina D.P. Sukhanov A.M. Sukharev A.A. Talyshev V.A. Tayursky V.I. Telnov Yu.A. Tikhonov K.Yu. Todyshev A.G. Tribendis G.M. Tumaikin Yu.V. Usov A.I. Vorobiov V.N. Zhilich A.A. Zhukov V.V. Zhulanov A.N. Zhuravlev (KEDR Collaboration)
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keywords rightarrowbranchingcdotkedrresultscollectedcolliderdecay
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We present the study of the decay $J/\psi \rightarrow \rho\pi$. The results are based on of 5.2~million $J/\psi$ events collected by the KEDR detector at the VEPP-4M collider. The branching fractions are measured to be $\B(J/\psi \rightarrow \rho\pi) = \big(2.072\pm 0.017 \pm 0.062 \big)\cdot 10^{-2}$ and $\B(J/\psi \rightarrow \pi^+\pi^-\pi^0) = \big(1.878 \pm 0.013 \pm 0.051 \big)\cdot 10^{-2}$, where the first uncertainties are statistical and the second systematic. Our results are more precise than the previous relative measurements.

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