1 Ocak 2023 Dergi makalesi Açık Erişim

CERN İşbirliği

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{
  "@context": "https://schema.org/", 
  "@id": 264120, 
  "@type": "ScholarlyArticle", 
  "creator": [
    {
      "@type": "Person", 
      "affiliation": "CERN", 
      "name": "CERN \u0130\u015fbirli\u011fi"
    }
  ], 
  "datePublished": "2023-01-01", 
  "description": "<p>Using data samples collected at center-of-mass energies between 2.000 and 3.080 GeV with the BESIII detector operating at the BEPCII collider, a partial-wave analysis is performed on the process ${e}^{+}{e}^{-}\\to \\eta {\\pi }^{+}{\\pi }^{-}$. In addition to the dominant ${e}^{+}{e}^{-}\\to \\rho \\eta $ component, the ${e}^{+}{e}^{-}\\to {a}_{2}\\left(1320\\right)\\pi $ process is also sizable, contributing up to 24% of the total reaction. The measured cross sections of the process ${e}^{+}{e}^{-}\\to \\eta {\\pi }^{+}{\\pi }^{-}$ are systematically higher than those of BABAR by more than $3\\sigma $ at center-of-mass energies between 2.000 and 2.300 GeV. In the cross section line shape for ${e}^{+}{e}^{-}\\to {a}_{2}\\left(1320\\right)\\pi $, a resonant structure is observed with a significance of $5.5\\sigma $, with $M=\\left(2044\u00b131\u00b14\\right)\\text{}\\text{}\\mathrm{MeV}/{c}^{2}$, $\\Gamma =\\left(163\u00b169\u00b124\\right)\\text{}\\text{}\\mathrm{MeV}$, and ${B}_{R}\u00b7{\\Gamma }_{{e}^{+}{e}^{-}}^{R}=\\left(34.6\u00b117.1\u00b16.0\\right)\\text{}\\text{}\\mathrm{eV}$ or $\\left(137.1\u00b173.3\u00b12.1\\right)\\text{}\\text{}\\mathrm{eV}$. In the cross section line shape for ${e}^{+}{e}^{-}\\to \\rho \\eta $, an evidence of a dip structure around $2180\\text{}\\text{}\\mathrm{MeV}/{c}^{2}$ is observed with statistical significance of $3.0\\sigma $.</p>", 
  "headline": "Measurement of the cross sections for ${e}^{+}{e}^{-}\\to \\eta {\\pi }^{+}{\\pi }^{-}$ at center-of-mass energies between 2.00 and 3.08 GeV", 
  "identifier": 264120, 
  "image": "https://aperta.ulakbim.gov.tr/static/img/logo/aperta_logo_with_icon.svg", 
  "license": "http://www.opendefinition.org/licenses/cc-by", 
  "name": "Measurement of the cross sections for ${e}^{+}{e}^{-}\\to \\eta {\\pi }^{+}{\\pi }^{-}$ at center-of-mass energies between 2.00 and 3.08 GeV", 
  "url": "https://aperta.ulakbim.gov.tr/record/264120"
}