29 Nisan 2024 Dergi makalesi Açık Erişim

CERN İşbirliği

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  <identifier identifierType="URL">https://aperta.ulakbim.gov.tr/record/275113</identifier>
  <creators>
    <creator>
      <creatorName>CERN İşbirliği</creatorName>
      <affiliation>CERN</affiliation>
    </creator>
  </creators>
  <titles>
    <title>Search For ${\Eta }_{C}\Left(2S\Right)\To {\Pi }^{+}{\Pi }^{-}{\Eta }_{C}$ And ${\Eta }_{C}\Left(2S\Right)\To {\Pi }^{+}{\Pi }^{-}{K}_{S}^{0}{K}^{±}{\Pi }^{\Mp }$ Decays</title>
  </titles>
  <publisher>Aperta</publisher>
  <publicationYear>2024</publicationYear>
  <dates>
    <date dateType="Issued">2024-04-29</date>
  </dates>
  <resourceType resourceTypeGeneral="Text">Journal article</resourceType>
  <alternateIdentifiers>
    <alternateIdentifier alternateIdentifierType="url">https://aperta.ulakbim.gov.tr/record/275113</alternateIdentifier>
  </alternateIdentifiers>
  <relatedIdentifiers>
    <relatedIdentifier relatedIdentifierType="DOI" relationType="IsIdenticalTo">10.1103/PhysRevD.109.072017</relatedIdentifier>
  </relatedIdentifiers>
  <rightsList>
    <rights rightsURI="http://www.opendefinition.org/licenses/cc-by">Creative Commons Attribution</rights>
    <rights rightsURI="info:eu-repo/semantics/openAccess">Open Access</rights>
  </rightsList>
  <descriptions>
    <description descriptionType="Abstract">&lt;p&gt;Based on $\left(27.12±0.14\right)×{10}^{8}\text{}\text{}\psi \left(2S\right)$ events collected by the BESIII detector, we search for the decay ${\eta }_{c}\left(2S\right)\to {\pi }^{+}{\pi }^{-}{\eta }_{c}$ via $\psi \left(2S\right)\to \gamma {\eta }_{c}\left(2S\right)$. No significant signal is observed, and the upper limit on the product branching fraction $B\left(\psi \left(2S\right)\to \gamma {\eta }_{c}\left(2S\right)\right)×B\left({\eta }_{c}\left(2S\right)\to {\pi }^{+}{\pi }^{-}{\eta }_{c}$) is determined to be $2.21×{10}^{-5}$ at the 90% confidence level. In addition, the ${\eta }_{c}\left(2S\right)\to {\pi }^{+}{\pi }^{-}{K}_{S}^{0}{K}^{±}{\pi }^{\mp }$ decay is studied via $\psi \left(2S\right)\to \gamma {\eta }_{c}\left(2S\right)$ and is observed with a statistical significance of $10\sigma $ for the first time. The branching fraction of ${\eta }_{c}\left(2S\right)\to {\pi }^{+}{\pi }^{-}{K}_{S}^{0}{K}^{±}{\pi }^{\mp }$ is determined to be ($1.33±0.11±0.40±0.95$)$×{10}^{-2}$, where the first uncertainty is statistical, the second is systematic, and the third uncertainty is due to the quoted $B\left(\psi \left(2S\right)\to \gamma {\eta }_{c}\left(2S\right)\right)$.&lt;/p&gt;</description>
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