Abstract <p>The cross section of the process <InlineEquation ID="IEq1"> <InlineMediaObject> <ImageObject Color="BlackWhite" FileRef="11496_2025_9077_Article_IEq1.gif" Format="GIF" Height="16" Rendition="HTML" Resolution="72" Type="Linedraw" Width="119" /> </InlineMediaObject> <EquationSource Format="TEX">\({{e}^{ + }}{{e}^{ - }} \to {{\pi }^{ + }}{{\pi }^{ - }}{{\pi }^{0}}\)</EquationSource> <!--PhysPart2470234Fedotovich-m1--> </InlineEquation> is measured in the center-of-mass energy region below 1 GeV at the integrated luminosity of 51.4 <InlineEquation ID="IEq2"> <InlineMediaObject> <ImageObject Color="BlackWhite" FileRef="11496_2025_9077_Article_IEq2.gif" Format="GIF" Height="20" Rendition="HTML" Resolution="72" Type="Linedraw" Width="35" /> </InlineMediaObject> <EquationSource Format="TEX">\({\text{p}}{{{\text{b}}}^{{ - 1}}}\)</EquationSource> <!--PhysPart2470234Fedotovich-m2--> </InlineEquation>. The systematic error of the measurement is estimated at ~2.4<InlineEquation ID="IEq3"> <InlineMediaObject> <ImageObject Color="BlackWhite" FileRef="11496_2025_9077_Article_IEq3.gif" Format="GIF" Height="16" Rendition="HTML" Resolution="72" Type="Linedraw" Width="15" /> </InlineMediaObject> <EquationSource Format="TEX">\(\% \)</EquationSource> <!--PhysPart2470234Fedotovich-m3--> </InlineEquation>. The measured cross section is analyzed within the vector dominance model with allowance for the interference of the resonances <InlineEquation ID="IEq4"> <InlineMediaObject> <ImageObject Color="BlackWhite" FileRef="11496_2025_9077_Article_IEq4.gif" Format="GIF" Height="21" Rendition="HTML" Resolution="72" Type="Linedraw" Width="97" /> </InlineMediaObject> <EquationSource Format="TEX">\(\rho ,\omega ,\phi ,\omega ^{ '},\omega {\kern 1pt}^ {''}\)</EquationSource> <!--PhysPart2470234Fedotovich-m4--> </InlineEquation>. The preliminary parameters of <InlineEquation ID="IEq5"> <InlineMediaObject> <ImageObject Color="BlackWhite" FileRef="11496_2025_9077_Article_IEq5.gif" Format="GIF" Height="12" Rendition="HTML" Resolution="72" Type="Linedraw" Width="13" /> </InlineMediaObject> <EquationSource Format="TEX">\(\rho \)</EquationSource> <!--PhysPart2470234Fedotovich-m5--> </InlineEquation> and <InlineEquation ID="IEq6"> <InlineMediaObject> <ImageObject Color="BlackWhite" FileRef="11496_2025_9077_Article_IEq6.gif" Format="GIF" Height="10" Rendition="HTML" Resolution="72" Type="Linedraw" Width="14" /> </InlineMediaObject> <EquationSource Format="TEX">\(\omega \)</EquationSource> <!--PhysPart2470234Fedotovich-m6--> </InlineEquation> mesons are obtained.</p>

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Study of the Process e+e → π+ππ0 with the CMD-3 Detector at the VEPP-2000

  • G. V. Fedotovich,
  • S. S. Tolmachev,
  • V. V. Kolzhetsov,
  • D. V. Shoukavy,
  • D. S. Vasileuskaya

摘要

Abstract

The cross section of the process \({{e}^{ + }}{{e}^{ - }} \to {{\pi }^{ + }}{{\pi }^{ - }}{{\pi }^{0}}\) is measured in the center-of-mass energy region below 1 GeV at the integrated luminosity of 51.4 \({\text{p}}{{{\text{b}}}^{{ - 1}}}\) . The systematic error of the measurement is estimated at ~2.4 \(\% \) . The measured cross section is analyzed within the vector dominance model with allowance for the interference of the resonances \(\rho ,\omega ,\phi ,\omega ^{ '},\omega {\kern 1pt}^ {''}\) . The preliminary parameters of \(\rho \) and \(\omega \) mesons are obtained.