Study of the process $e^+e^- \to π^+π^-π^0$ in the energy region $\sqrt[]{s}$ from 0.98 to 1.38 GeV.}

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dc.creatorAchasov, M. N.
dc.creatorAulchenko, V. M.
dc.creatorBeloborodov, K. I.
dc.creatorBerdyugin, A. V.
dc.creatorBogdanchikov, A. G.
dc.creatorBozhenok, A. V.
dc.creatorBukin, A. D.
dc.creatorBukin, D. A.
dc.creatorBurdin, S. V.
dc.creatorDimova, T. V.
dc.creatorDruzhinin, V. P.
dc.creatorGolubev, V. B.
dc.creatorIvanchenko, V. N.
dc.creatorKorol, A. A.
dc.creatorKoshuba, S. V.
dc.creatorNesterenko, I. N.
dc.creatorPakhtusova, E. V.
dc.creatorPolunin, A. A.
dc.creatorSalnikov, A. A.
dc.creatorSerednyakov, S. I.
dc.creatorShary, V. V.
dc.creatorShatunov, Yu. M.
dc.creatorSidorov, V. A.
dc.creatorSilagadze, Z. K.
dc.creatorSkrinsky, A. N.
dc.creatorSkripkin, A. G.
dc.creatorUsov, Yu. V.
dc.creatorVasiljev, A. V.
dc.date2002-01-26
dc.date2002-08-12
dc.date.accessioned2026-07-07T10:32:08Z
dc.date.available2026-07-07T10:32:08Z
dc.descriptionThe cross section of the process $e^+e^-\to π^+π^-π^0$ was measured in the Spherical Neutral Detector experiment at the VEPP-2M collider in the energy region $\sqrt[]{s} = 980 ÷1380$ MeV. The measured cross section, together with the $e^+e^-\to π^+π^-π^0$ and $ωπ^+π^-$ cross sections obtained in other experiments, was analyzed in the framework of the generalized vector meson dominance model. It was found that the experimental data can be described by a sum of $ω$, $ϕ$ mesons and two $ω^\prime$ and $ω^{\prime\prime}$ resonances contributions, with masses $m_{ω^\prime}\sim 1490$,$m_{ω^{\prime\prime}}\sim 1790$ MeV and widths $Γ_{ω^\prime}\sim 1210$, $Γ_{ω^{\prime\prime}}\sim 560$ MeV. The analysis of the $π^+π^-$ invariant mass spectra in the energy region $\sqrt[]{s}$ from 1100 to 1380 MeV has shown that for their descriptionone should take into account the $e^+e^-\toωπ^0\toπ^+π^-π^0$ mechanism also. The phase between the amplitudes corresponding to the $e^+e^-\toωπ$ and $e^+e^-\toρπ$ intermediate states was measured for the first time. The value of the phase is close to zero and depends on energy.
dc.description29 pages REVTEX and 17 figures, accepted for publication in Physical Review D
dc.identifierhttps://arxiv.org/abs/hep-ex/0201040
dc.identifierhttp://arxiv.org/abs/hep-ex/0201040
dc.identifierPhys.Rev.D66:032001,2002
dc.identifierdoi:10.1103/PhysRevD.66.032001
dc.identifier.urihttp://salesiana.dossiersoluciones.com/handle/123456789/178655
dc.subjectHigh Energy Physics - Experiment
dc.titleStudy of the process $e^+e^- \to π^+π^-π^0$ in the energy region $\sqrt[]{s}$ from 0.98 to 1.38 GeV.}
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