5 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>2024-04-05</dc:date>
  <dc:description>Using ${e}^{+}{e}^{-}$ collision data corresponding to an integrated luminosity of $7.33\text{}\text{}{\mathrm{fb}}^{-1}$ recorded by the BESIII detector at center-of-mass energies between 4.128 and 4.226 GeV, we present an analysis of the decay ${D}_{s}^{+}\to {\pi }^{+}{\pi }^{-}{e}^{+}{\nu }_{e}$, where the ${D}_{s}^{+}$ is produced via the process ${e}^{+}{e}^{-}\to {D}_{s}^{*±}{D}_{s}^{\mp }$. We observe the ${f}_{0}\left(980\right)$ in the ${\pi }^{+}{\pi }^{-}$ system and the branching fraction of the decay ${D}_{s}^{+}\to {f}_{0}\left(980\right){e}^{+}{\nu }_{e}$ with ${f}_{0}\left(980\right)\to {\pi }^{+}{\pi }^{-}$ measured to be $\left(1.72±0.1{3}_{\mathrm{stat}}±0.1{0}_{\mathrm{syst}}\right)×{10}^{-3}$, where the uncertainties are statistical and systematic, respectively. The dynamics of the ${D}_{s}^{+}\to {f}_{0}\left(980\right){e}^{+}{\nu }_{e}$ decay are studied with the simple pole parametrization of the hadronic form factor and the Flatté formula describing the ${f}_{0}\left(980\right)$ in the differential decay rate, and the product of the form factor ${f}_{+}^{{f}_{0}}\left(0\right)$ and the $c\to s$ Cabibbo-Kobayashi-Maskawa matrix element $|{V}_{cs}|$ is determined for the first time to be ${f}_{+}^{{f}_{0}}\left(0\right)|{V}_{cs}|=0.504±0.01{7}_{\mathrm{stat}}±0.03{5}_{\mathrm{syst}}$. Furthermore, the decay ${D}_{s}^{+}\to {f}_{0}\left(500\right){e}^{+}{\nu }_{e}$ is searched for the first time but no signal is found. The upper limit on the branching fraction of ${D}_{s}^{+}\to {f}_{0}\left(500\right){e}^{+}{\nu }_{e}$, ${f}_{0}\left(500\right)\to {\pi }^{+}{\pi }^{-}$ decay is set to be $3.3×{10}^{-4}$ at 90% confidence level.</dc:description>
  <dc:identifier>https://aperta.ulakbim.gov.trrecord/275157</dc:identifier>
  <dc:identifier>oai:aperta.ulakbim.gov.tr:275157</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 Letters 132(14)</dc:source>
  <dc:title>Study of the ${f}_{0}\left(980\right)$ and ${f}_{0}\left(500\right)$ Scalar Mesons through the Decay ${D}_{s}^{+}\to {\pi }^{+}{\pi }^{-}{e}^{+}{\nu }_{e}$</dc:title>
  <dc:type>info:eu-repo/semantics/article</dc:type>
  <dc:type>publication-article</dc:type>
</oai_dc:dc>