30 Nisan 2024 Dergi makalesi Açık Erişim

CERN İşbirliği

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<oai_dc:dc xmlns:dc="http://purl.org/dc/elements/1.1/" xmlns:oai_dc="http://www.openarchives.org/OAI/2.0/oai_dc/" xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance" xsi:schemaLocation="http://www.openarchives.org/OAI/2.0/oai_dc/ http://www.openarchives.org/OAI/2.0/oai_dc.xsd">
  <dc:creator>CERN İşbirliği</dc:creator>
  <dc:date>2024-04-30</dc:date>
  <dc:description>The singly Cabibbo-suppressed decay ${\Lambda }_{c}^{+}\to {\Sigma }^{-}{K}^{+}{\pi }^{+}$ is observed for the first time with a statistical significance of $5.4\sigma $ by using $4.5\text{}\text{}{\mathrm{fb}}^{-1}$ of ${e}^{+}{e}^{-}$ collision data collected at center-of-mass energies between 4.600 and 4.699 GeV with the BESIII detector at BEPCII. The absolute branching fraction of ${\Lambda }_{c}^{+}\to {\Sigma }^{-}{K}^{+}{\pi }^{+}$ is measured to be $\left(3.8±{1.2}_{\mathrm{stat}}±{0.2}_{\mathrm{syst}}\right)×{10}^{-4}$ in a model-independent approach. This is the first observation of a Cabibbo-suppressed ${\Lambda }_{c}^{+}$ decay involving ${\Sigma }^{-}$ in the final state. The ratio of branching fractions between ${\Lambda }_{c}^{+}\to {\Sigma }^{-}{K}^{+}{\pi }^{+}$ and the Cabibbo-favored decay ${\Lambda }_{c}^{+}\to {\Sigma }^{-}{\pi }^{+}{\pi }^{+}$ is observed to be $\left(0.4±0.1\right){s}_{c}^{2}$, where ${s}_{c}\equiv \mathrm{sin}{\theta }_{c}=0.2248$ with ${\theta }_{c}$ the Cabibbo mixing angle.</dc:description>
  <dc:identifier>https://aperta.ulakbim.gov.trrecord/275107</dc:identifier>
  <dc:identifier>oai:aperta.ulakbim.gov.tr:275107</dc:identifier>
  <dc:rights>info:eu-repo/semantics/openAccess</dc:rights>
  <dc:rights>http://www.opendefinition.org/licenses/cc-by</dc:rights>
  <dc:source>Physical Review D 109(7)</dc:source>
  <dc:title>Observation of the singly Cabibbo-suppressed decay ${\Lambda }_{c}^{+}\to {\Sigma }^{-}{K}^{+}{\pi }^{+}$</dc:title>
  <dc:type>info:eu-repo/semantics/article</dc:type>
  <dc:type>publication-article</dc:type>
</oai_dc:dc>