8 Nisan 2024 Dergi makalesi Açık Erişim

CERN İşbirliği

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{
  "@context": "https://schema.org/", 
  "@id": 275155, 
  "@type": "ScholarlyArticle", 
  "creator": [
    {
      "@type": "Person", 
      "affiliation": "CERN", 
      "name": "CERN \u0130\u015fbirli\u011fi"
    }
  ], 
  "datePublished": "2024-04-08", 
  "description": "<p>Using a data sample corresponding to an integrated luminosity of $10.9\\text{}\\text{}{\\mathrm{fb}}^{-1}$ collected at center-of-mass energies from 4.16 to 4.34 GeV with the BESIII detector, we search for the decay ${\\chi }_{c1}\\left(3872\\right)\\to {\\pi }^{+}{\\pi }^{-}{\\chi }_{c1}$ in the radiative production ${e}^{+}{e}^{-}\\to \\gamma {\\chi }_{c1}\\left(3872\\right)$. No significant signal is observed, and the ratio for the branching fraction of ${\\chi }_{c1}\\left(3872\\right)\\to {\\pi }^{+}{\\pi }^{-}{\\chi }_{c1}$ to ${\\chi }_{c1}\\left(3872\\right)\\to {\\pi }^{+}{\\pi }^{-}J/\\psi $ is measured as $R\\equiv \\frac{B\\left[{\\chi }_{c1}\\left(3872\\right)\\to {\\pi }^{+}{\\pi }^{-}{\\chi }_{c1}\\right]}{B\\left[{\\chi }_{c1}\\left(3872\\right)\\to {\\pi }^{+}{\\pi }^{-}J/\\psi \\right]}&lt;0.18$ at 90% confidence level. An upper limit on the product of the cross section $\\sigma \\left[{e}^{+}{e}^{-}\\to \\gamma {\\chi }_{c1}\\left(3872\\right)\\right]$ and the branching fraction $B\\left[{\\chi }_{c1}\\left(3872\\right)\\to {\\pi }^{+}{\\pi }^{-}{\\chi }_{c1}\\right]$ at each center-of-mass energy is also given. These measurements favor the nonconventional charmonium nature of the ${\\chi }_{c1}\\left(3872\\right)$ state.</p>", 
  "headline": "Search for the decay ${\\chi }_{c1}\\left(3872\\right)\\to {\\pi }^{+}{\\pi }^{-}{\\chi }_{c1}$", 
  "identifier": 275155, 
  "image": "https://aperta.ulakbim.gov.tr/static/img/logo/aperta_logo_with_icon.svg", 
  "license": "http://www.opendefinition.org/licenses/cc-by", 
  "name": "Search for the decay ${\\chi }_{c1}\\left(3872\\right)\\to {\\pi }^{+}{\\pi }^{-}{\\chi }_{c1}$", 
  "url": "https://aperta.ulakbim.gov.tr/record/275155"
}