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  • Updated measurement of the \(e^+e^- \to \omega \pi^0 \to \pi^0\pi^0\gamma\) cross section with the SND detector
    Achasov, M N; A Yu Barnyakov; Beloborodov, K I; Berdyugin, A V; Berkaev, D E; Bogdanchikov, A G; Botov, A A; Dimova, T V; Druzhinin, V P; Golubev, V B; Kardapoltsev, L V; Kasaev, A S; Kharlamov, A G; Kirpotin, A N; Kovrizhin, D P; Koop, I A; Korol, A A; Koshuba, S V; Martin, K A; Obrazovsky, A E; Pakhtusova, E V; Rogovsky, Yu A; Senchenko, A I; Serednyakov, S I; Silagadze, Z K; Shatunov, Yu M; Shtol, D A; Shwartz, D B; Skrinsky, A N; Surin, I K; Vasiljev, A V

    arXiv.org, 10/2016
    Paper

    We analyze a 37 pb\(^{-1}\) data sample collected with the SND detector at the VEPP-2000 \(e^+e^-\) collider in the center-of-mass energy range 1.05--2.00 GeV and present an updated measurement of the \(e^+e^- \to \omega \pi^0 \to \pi^0\pi^0\gamma\) cross section. In particular, we correct the mistake in radiative correction calculation made in our previous measurement based on a part of the data. The measured cross section is fitted with the vector meson dominance model with three \(\rho\)-like states and used to test the conserved vector current hypothesis in the \(\tau^-\to\omega\pi^-\nu_{\tau}\) decay.

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