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arXiv · 1903.09307

Measurement of the $e^+e^- \to \pi^+\pi^-\pi^0\eta$ cross section below $\sqrt{s}=2$ GeV

M. N. Achasov·A. Yu. Barnyakov·K. I. Beloborodov·A. V. Berdyugin·A. G. Bogdanchikov·A. A. Botov·T. V. Dimova·V. P. Druzhinin·V. B. Golubev·L. V. Kardapoltsev·A. G. Kharlamov·A. A. Korol·S. V. Koshuba·D. P. Kovrizhin·A. S. Kupich·R. A. Litvinov·A. P. Lysenko·K. A. Martin·N. A. Melnikova·N. Yu. Muchnoy·A. E. Obrazovsky·E. V. Pakhtusova·E. A. Perevedentsev·K. V. Pugachev·S. I. Serednyakov·P. Yu. Shatunov·Yu. M. Shatunov·D. A. Shtol·Z. K. Silagadze·A. N. Skrinsky·I. K. Surin·Yu. A. Tikhonov·A. V. Vasiljev·I. M. Zemlyansky
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Abstract

The process $e^+e^- \to \pi^+\pi^-\pi^0\eta$ is studied in the center-of-mass energy region below 2 GeV with the SND detector at the VEPP-2000 $e^+e^-$ collider. The four intermediate states contribute to this process: $\omega\eta$, $\phi\eta$, $a_0(980)\rho$, and a structureless $\pi^+\pi^-\pi^0\eta$ state. We measure the total $e^+e^- \to \pi^+\pi^-\pi^0\eta$ cross section and the cross sections for its components: $\omega\eta$, $\phi\eta$, and a sum of $a_0(980)\rho$ and the structureless state. Our results are in agreement with previous measurements and have comparable or better accuracies.

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M. N. Achasov, A. Yu. Barnyakov, K. I. Beloborodov, A. V. Berdyugin, A. G. Bogdanchikov, A. A. Botov, T. V. Dimova, V. P. Druzhinin, V. B. Golubev, L. V. Kardapoltsev, A. G. Kharlamov, A. A. Korol, S. V. Koshuba, D. P. Kovrizhin, A. S. Kupich, R. A. Litvinov, A. P. Lysenko, K. A. Martin, N. A. Melnikova, N. Yu. Muchnoy, A. E. Obrazovsky, E. V. Pakhtusova, E. A. Perevedentsev, K. V. Pugachev, S. I. Serednyakov, P. Yu. Shatunov, Yu. M. Shatunov, D. A. Shtol, Z. K. Silagadze, A. N. Skrinsky, I. K. Surin, Yu. A. Tikhonov, A. V. Vasiljev, I. M. Zemlyansky. 2019-03-21. Measurement of the $e^+e^- \to \pi^+\pi^-\pi^0\eta$ cross section below $\sqrt{s}=2$ GeV. https://doi.org/10.1103/physrevd.99.112004

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