1 Ocak 2023 Dergi makalesi Açık Erişim

CERN İşbirliği

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{
  "@context": "https://schema.org/", 
  "@id": 264890, 
  "@type": "ScholarlyArticle", 
  "creator": [
    {
      "@type": "Person", 
      "affiliation": "CERN", 
      "name": "CERN \u0130\u015fbirli\u011fi"
    }
  ], 
  "datePublished": "2023-01-01", 
  "description": "<p>We search for an axion-like particle (ALP) a through the process $\\psi \\left(3686\\right)\\to {\\pi }^{+}{\\pi }^{-}J/\\psi $, $J/\\psi \\to \\gamma a$, $a\\to \\gamma \\gamma $ in a data sample of $\\left(2.71\u00b10.01\\right)\u00d7{10}^{9}$ $\\psi \\left(3686\\right)$ events collected by the BESIII detector. No significant ALP signal is observed over the expected background, and the upper limits on the branching fraction of the decay $J/\\psi \\to \\gamma a$ and the ALP-photon coupling constant ${g}_{a\\gamma \\gamma }$ are set at 95% confidence level in the mass range of $0.165\\le {m}_{a}\\le 2.84\\phantom{\\rule{0.25em}{0ex}}\\text{GeV}/{c}^{2}$. The limits on $B\\left(J/\\psi \\to \\gamma a\\right)$ range from $8.3\u00d7{10}^{-8}$ to $1.8\u00d7{10}^{-6}$ over the search region, and the constraints on the ALP-photon coupling are the most stringent to date for $0.165\\le {m}_{a}\\le 1.468\\phantom{\\rule{0.25em}{0ex}}\\text{GeV}/{c}^{2}$.</p>", 
  "headline": "Search for an axion-like particle in radiative / Decays", 
  "identifier": 264890, 
  "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 an axion-like particle in radiative / Decays", 
  "url": "https://aperta.ulakbim.gov.tr/record/264890"
}