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arXiv · 2211.13520

Measurement of the branching fraction of $J/\psi\rightarrow\rho\pi$ 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·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
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Abstract

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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V. V. Anashin, O. V. Anchugov, A. V. Andrianov, K. V. Astrelina, V. M. Aulchenko, E. M. Baldin, G. N. Baranov, A. K. Barladyan, 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. 2022-11-24. Measurement of the branching fraction of $J/\psi\rightarrow\rho\pi$ at KEDR. https://doi.org/10.1007/jhep06(2023)196

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