arXiv · hep-ex/0309055
Experimental study of the e^+e^-\toπ^+π^-π^0 reaction by SND detector in the energy range sqrt{s}=0.42--1.38 GeV
Abstract
The review of the SND results of the $e^+e^-\toπ^+π^-π^0$ process study in the energy range $\sqrt[]{s}=0.42$ -- 1.38 GeV at VEPP-2M collider, based on about $2\times 10^6$ selected events, is presented. The total cross section, parameters of the $ρ$, $ω$, $ϕ$ resonances, and $ω^\prime$, $ω^{\prime\prime}$ states were obtained. It was found that $ρπ$ and $ωπ^0$ intermediate states describe the reaction dynamics. The experimental data cannot be described by a sum of only $ω$, $ϕ$, $ω^\prime$ and $ω^{\prime\prime}$ resonances contributions. This can be interpreted as a manifestation of the $ρ\to 3π$ decay, suppressed by $G$-parity, with relative probability $B(ρ\to 3π) = (1.01\pm^{0.54}_{0.36}\pm 0.034) \times 10^{-4}$.
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M. N. Achasov, K. I. Beloborodov, A. V. Berdyugin, A. G. Bogdanchikov, A. V. Bozhenok, A. D. Bukin, D. A. Bukin, T. V. Dimova, V. P. Druzhinin, V. B. Golubev, A. A. Korol, S. V. Koshuba, E. V. Pakhtusova, E. A. Perevedentsev, E. E. Pyata, S. I. Serednyakov, Yu. M. Shatunov, V. A. Sidorov, Z. K. Silagadze, A. A. Valishev, A. V. Vasiljev. 2003-09-18. Experimental study of the e^+e^-\toπ^+π^-π^0 reaction by SND detector in the energy range sqrt{s}=0.42--1.38 GeV. https://doi.org/10.1063/1.1799678
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