Measurement of the branching fraction of $J/\psi\rightarrow\rho\pi$ at KEDR

• Main Authors: 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
• Format: Journal Article
• Language: English
• Published: 24.11.2022
• Subjects: Physics - High Energy Physics - Experiment
• DOI: 10.48550/arxiv.2211.13520

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.