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  • Measurement of the branching fraction of $J/\psi\rightarrow\rho\pi$ at KEDR
    Anashin, V. V; Anchugov, O. V; Andrianov, A. V; Astrelina, K. V; Aulchenko, V. M; Baldin, E. M; Baranov, G. N; Barladyan, A. K; Barnyakov, A. Yu; Barnyakov, M. Yu; Basok, I. Yu; Batrakov, A. M; Bekhtenev, E. A; Belikov, O. V; Berkaev, D. E; Blinov, A. E; Blinov, V. E; Blinov, M. F; Bobrov, A. V; Bobrovnikov, V. S; Bogomyagkov, A. V; Bolkhovityanov, D. Yu; Bondar, A. E; Buzykaev, A. R; Cheblakov, P. B; Dorohov, V. L; Emanov, F. A; Gambaryan, V. V; Grigoriev, D. N; Kaminskiy, V. V; Karnaev, S. E; Karpov, G. V; Karpov, S. V; Karukina, K. Yu; Kashtankin, D. P; Kasyanenko, P. V; Katcin, A. A; Kharlamova, T. A; Kiselev, V. A; Kononov, S. A; Krasnov, A. A; Kravchenko, E. A; Kudryavtsev, V. N; Kulikov, V. F; Kuyanov, I. A; Levichev, E. B; Logachev, P. V; Maksimov, D. A; Maltseva, Yu. I; Malyshev, V. M; Maslennikov, A. L; Meshkov, O. I; Mishnev, S. I; Morozov, I. A; Morozov, I. I; Nikiforov, D. A; Nikitin, S. A; Nikolaev, I. B; Okunev, I. N; Oreshkin, S. B; Osipov, A. A; Ovtin, I. V; Pavlenko, A. V; Peleganchuk, S. V; Piminov, P. A; Podgornov, N. A; Prisekin, V. G; Rezanova, O. L; Ruban, A. A; Savinov, G. A; Shamov, A. G; Shekhtman, L. I; Shvedov, D. A; Shwartz, B. A; Simonov, E. A; Sinyatkin, S. V; Skrinsky, A. N; Sokolov, A. V; Starostina, E. V; Sukhanov, D. P; Sukharev, A. M; Talyshev, A. A; Tayursky, V. A; Telnov, V. I; Tikhonov, Yu. A; Todyshev, K. Yu; Tribendis, A. G; Tumaikin, G. M; Usov, Yu. V; Vorobiov, A. I; Zhilich, V. N; Zhukov, A. A; Zhulanov, V. V; Zhuravlev, A. N

    arXiv (Cornell University), 11/2022
    Journal Article

    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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