30 Eylül 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>2024-09-30</dc:date>
  <dc:description>Analyzing ${e}^{+}{e}^{-}$ collision data corresponding to an integrated luminosity of $7.33\text{}\text{}{\mathrm{fb}}^{-1}$ collected at center-of-mass energies between 4.128 and 4.226 GeV with the BESIII detector, we measure the branching fraction of the semileptonic decay ${D}_{s}^{+}\to {K}^{0}{e}^{+}{\nu }_{e}$ to be $\left(2.98±0.2{3}_{\mathrm{stat}}±0.1{2}_{\mathrm{syst}}\right)×{10}^{-3}$. Based on fit to the partial decay rates in various ${q}^{2}$ intervals, the product value of ${D}_{s}^{+}\to {K}^{0}$ hadronic form factor and Cabibbo-Kobayashi-Maskawa element is measured to be ${f}_{+}^{{K}^{0}}\left(0\right)|{V}_{cd}|=0.143±0.01{1}_{\mathrm{stat}}±0.00{3}_{\mathrm{syst}}$. With $|{V}_{cd}|=0.22486±0.00067$ as an input, the hadronic form factor is evaluated to be ${f}_{+}^{{K}^{0}}\left(0\right)=0.636±0.04{9}_{\mathrm{stat}}±0.01{3}_{\mathrm{syst}}$. The branching fraction and form factor measurements are factors of 1.6 and 1.7 more precise than the previous world averages, respectively.</dc:description>
  <dc:identifier>https://aperta.ulakbim.gov.trrecord/274673</dc:identifier>
  <dc:identifier>oai:aperta.ulakbim.gov.tr:274673</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 110(5)</dc:source>
  <dc:title>Improved measurement of the semileptonic decay ${D}_{s}^{+}\to {K}^{0}{e}^{+}{\nu }_{e}$</dc:title>
  <dc:type>info:eu-repo/semantics/article</dc:type>
  <dc:type>publication-article</dc:type>
</oai_dc:dc>