29 Ocak 2024 Dergi makalesi Açık Erişim

CERN İşbirliği

Citation Style Language JSON

{
  "DOI": "10.1103/PhysRevD.109.L011102", 
  "abstract": "<p>With a data sample corresponding to an integrated luminosity of $11.5\\text{}\\text{}{\\mathrm{fb}}^{-1}$ collected with the BESIII detector operating at the BEPCII storage ring, for the first time the light hadron decay ${\\chi }_{c1}\\left(3872\\right)\\to {\\pi }^{+}{\\pi }^{-}\\eta $ is searched for. While no significant signal is observed, the upper limits at the 90% confidence level for $\\sigma \\left[{e}^{+}{e}^{-}\\to \\gamma {\\chi }_{c1}\\left(3872\\right)\\right]B\\left[{\\chi }_{c1}\\left(3872\\right)\\to {\\pi }^{+}{\\pi }^{-}\\eta \\right]$ at center of mass energies from 4.13 GeV to 4.34 GeV are determined. By normalizing to the ${\\chi }_{c1}\\left(3872\\right)\\to {\\pi }^{+}{\\pi }^{-}J/\\psi $ decay channel, a 90% confidence level upper limit for the branching fraction ratio $R=B\\left[{\\chi }_{c1}\\left(3872\\right)\\to {\\pi }^{+}{\\pi }^{-}\\eta \\right]/B\\left[{\\chi }_{c1}\\left(3872\\right)\\to {\\pi }^{+}{\\pi }^{-}J/\\psi \\right]&lt;0.12$ is given. These measurements provide important inputs for understanding the internal structure of the ${\\chi }_{c1}\\left(3872\\right)$ resonance.</p>", 
  "author": [
    {
      "family": "CERN \u0130\u015fbirli\u011fi"
    }
  ], 
  "container_title": "Physical Review D", 
  "id": "275289", 
  "issue": "1", 
  "issued": {
    "date-parts": [
      [
        2024, 
        1, 
        29
      ]
    ]
  }, 
  "title": "Search for the light hadron decay ${\\chi }_{c1}\\left(3872\\right)\\to {\\pi }^{+}{\\pi }^{-}\\eta $", 
  "type": "article-journal", 
  "volume": "109"
}