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Study of the \(\boldsymbol{e^{+}e^{-}\rightarrow}{\pi}^{\boldsymbol{+}}{\pi}^{\boldsymbol{-}}{\pi}^{\mathbf{0}}\) with the CMD-3 Detector at the VEPP-2000

  • S. S. Tolmachev

摘要

Abstract

We present preliminary results of the cross-section measurement of the \(e^{+}e^{-}\rightarrow\pi^{+}\pi^{-}\pi^{0}\) process based on an integrated luminosity of about 51.4 pb \({}^{-1}\) collected with the CMD-3 detector at the VEPP-2000 collider in the center-of-mass energy region below 1 GeV. A systematic uncertainty of the measurement is estimated as \(\sim 2.4\%\) . The measured cross-section is analyzed in the framework of the vector meson dominance model taking into account an interference of the \(\rho,\omega,\phi,\omega^{\prime},\omega^{\prime\prime}\) resonances. The preliminary parameters for the \(\omega\) and \(\rho\) resonances are obtained.