Updated measurement of the $e^+e^- \to \omega \pi^0 \to \pi^0\pi^0\gamma$ cross section with the SND detector

M. N. Achasov; A. Yu. Barnyakov; K. I. Beloborodov; A. V. Berdyugin; D. E. Berkaev; A. G. Bogdanchikov; A. A. Botov; T. V. Dimova; V. P. Druzhinin; V. B. Golubev; L. V. Kardapoltsev; A. S. Kasaev; A. G. Kharlamov; A. N. Kirpotin; D. P. Kovrizhin; I. A. Koop; A. A. Korol; S. V. Koshuba; K. A. Martin; A. E. Obrazovsky; E. V. Pakhtusova; Yu. A. Rogovsky; A. I. Senchenko; S. I. Serednyakov; Z. K. Silagadze; Yu. M. Shatunov; D. A. Shtol; D. B. Shwartz; A. N. Skrinsky; I. K. Surin; A. V. Vasiljev

doi:10.1103/physrevd.94.112001

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arXiv · 1610.00235

Updated measurement of the $e^+e^- \to \omega \pi^0 \to \pi^0\pi^0\gamma$ cross section with the SND detector

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Abstract

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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M. N. Achasov, A. Yu. Barnyakov, K. I. Beloborodov, A. V. Berdyugin, D. E. Berkaev, A. G. Bogdanchikov, A. A. Botov, T. V. Dimova, V. P. Druzhinin, V. B. Golubev, L. V. Kardapoltsev, A. S. Kasaev, A. G. Kharlamov, A. N. Kirpotin, D. P. Kovrizhin, I. A. Koop, A. A. Korol, S. V. Koshuba, K. A. Martin, A. E. Obrazovsky, E. V. Pakhtusova, Yu. A. Rogovsky, A. I. Senchenko, S. I. Serednyakov, Z. K. Silagadze, Yu. M. Shatunov, D. A. Shtol, D. B. Shwartz, A. N. Skrinsky, I. K. Surin, A. V. Vasiljev. 2016-10-02. Updated measurement of the $e^+e^- \to \omega \pi^0 \to \pi^0\pi^0\gamma$ cross section with the SND detector. https://doi.org/10.1103/physrevd.94.112001

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