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

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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 VEPP-4M collider. The branching fraction is measured to be \(\mathcal{B}(J/\psi\rightarrow\rho\pi) = \big(2.072\pm 0.017 \pm 0.056 \big)\cdot 10^{-2}\) where the first uncertainty is statistical, the second one is systematic. This is the most precise single measurement of this quantity at the moment.

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          Journal
          24 November 2022
          Article
          2211.13520
          db1184e7-d524-453f-81f6-6619d7112a64

          http://creativecommons.org/licenses/by/4.0/

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          hep-ex

          High energy & Particle physics
          High energy & Particle physics

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