8 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>2024-04-08</dc:date>
  <dc:description>Using a data sample corresponding to an integrated luminosity of $10.9\text{}\text{}{\mathrm{fb}}^{-1}$ collected at center-of-mass energies from 4.16 to 4.34 GeV with the BESIII detector, we search for the decay ${\chi }_{c1}\left(3872\right)\to {\pi }^{+}{\pi }^{-}{\chi }_{c1}$ in the radiative production ${e}^{+}{e}^{-}\to \gamma {\chi }_{c1}\left(3872\right)$. No significant signal is observed, and the ratio for the branching fraction of ${\chi }_{c1}\left(3872\right)\to {\pi }^{+}{\pi }^{-}{\chi }_{c1}$ to ${\chi }_{c1}\left(3872\right)\to {\pi }^{+}{\pi }^{-}J/\psi $ is measured as $R\equiv \frac{B\left[{\chi }_{c1}\left(3872\right)\to {\pi }^{+}{\pi }^{-}{\chi }_{c1}\right]}{B\left[{\chi }_{c1}\left(3872\right)\to {\pi }^{+}{\pi }^{-}J/\psi \right]}&lt;0.18$ at 90% confidence level. An upper limit on the product of the cross section $\sigma \left[{e}^{+}{e}^{-}\to \gamma {\chi }_{c1}\left(3872\right)\right]$ and the branching fraction $B\left[{\chi }_{c1}\left(3872\right)\to {\pi }^{+}{\pi }^{-}{\chi }_{c1}\right]$ at each center-of-mass energy is also given. These measurements favor the nonconventional charmonium nature of the ${\chi }_{c1}\left(3872\right)$ state.</dc:description>
  <dc:identifier>https://aperta.ulakbim.gov.trrecord/275155</dc:identifier>
  <dc:identifier>oai:aperta.ulakbim.gov.tr:275155</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>Search for the decay ${\chi }_{c1}\left(3872\right)\to {\pi }^{+}{\pi }^{-}{\chi }_{c1}$</dc:title>
  <dc:type>info:eu-repo/semantics/article</dc:type>
  <dc:type>publication-article</dc:type>
</oai_dc:dc>