15 Ekim 2024 Dergi makalesi Açık Erişim

CERN İşbirliği

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{
  "@context": "https://schema.org/", 
  "@id": 274653, 
  "@type": "ScholarlyArticle", 
  "creator": [
    {
      "@type": "Person", 
      "affiliation": "CERN", 
      "name": "CERN \u0130\u015fbirli\u011fi"
    }
  ], 
  "datePublished": "2024-10-15", 
  "description": "<p>We search for the hadronic decay ${\\eta }_{c}\\left(2S\\right)\\to 2\\left({\\pi }^{+}{\\pi }^{-}\\right)$ in the $\\psi \\left(3686\\right)\\to \\gamma {\\eta }_{c}\\left(2S\\right)$ radiative decay using $\\left(27.12\u00b10.14\\right)\u00d7{10}^{8}$ $\\psi \\left(3686\\right)$ events collected by the BESIII detector at the BEPCII collider. No significant signal is found, and the upper limit of $B\\left[\\psi \\left(3686\\right)\\to \\gamma {\\eta }_{c}\\left(2S\\right)\\right]B\\left[{\\eta }_{c}\\left(2S\\right)\\to 2\\left({\\pi }^{+}{\\pi }^{-}\\right)\\right]$ is determined to be $1.43\u00d7{10}^{-6}$ at the 90% confidence level. Using $\\psi \\left(3686\\right)\\to \\gamma {\\chi }_{cJ}$ transitions, we also measure the branching fractions of $B\\left[{\\chi }_{cJ\\left(J=0,1,2\\right)}\\to 2\\left({\\pi }^{+}{\\pi }^{-}\\right)\\right]$, which are $B\\left[{\\chi }_{c0}\\to 2\\left({\\pi }^{+}{\\pi }^{-}\\right)\\right]=\\phantom{\\rule{0ex}{0ex}}\\left(2.127\u00b10.002\\left(\\mathrm{stat}\\right)\u00b10.101\\left(\\mathrm{syst}\\right)\\right)%$, $B\\left[{\\chi }_{c1}\\to 2\\left({\\pi }^{+}{\\pi }^{-}\\right)\\right]=\\left(0.685\u00b10.001\\left(\\mathrm{stat}\\right)\u00b10.031\\left(\\mathrm{syst}\\right)\\right)%$, and $B\\left[{\\chi }_{c2}\\to 2\\left({\\pi }^{+}{\\pi }^{-}\\right)\\right]=\\left(1.153\u00b10.001\\left(\\mathrm{stat}\\right)\u00b10.063\\left(\\mathrm{syst}\\right)\\right)%$.</p>", 
  "headline": "Search for ${\\eta }_{c}\\left(2S\\right)\\to 2\\left({\\pi }^{+}{\\pi }^{-}\\right)$ and improved measurement of ${\\chi }_{cJ}\\to 2\\left({\\pi }^{+}{\\pi }^{-}\\right)$", 
  "identifier": 274653, 
  "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 ${\\eta }_{c}\\left(2S\\right)\\to 2\\left({\\pi }^{+}{\\pi }^{-}\\right)$ and improved measurement of ${\\chi }_{cJ}\\to 2\\left({\\pi }^{+}{\\pi }^{-}\\right)$", 
  "url": "https://aperta.ulakbim.gov.tr/record/274653"
}