30 Eylül 2024 Dergi makalesi Açık Erişim

CERN İşbirliği

Citation Style Language JSON

{
  "DOI": "10.1103/PhysRevD.110.052012", 
  "abstract": "<p>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 $\\left(2.98\u00b10.2{3}_{\\mathrm{stat}}\u00b10.1{2}_{\\mathrm{syst}}\\right)\u00d7{10}^{-3}$. 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 ${f}_{+}^{{K}^{0}}\\left(0\\right)|{V}_{cd}|=0.143\u00b10.01{1}_{\\mathrm{stat}}\u00b10.00{3}_{\\mathrm{syst}}$. With $|{V}_{cd}|=0.22486\u00b10.00067$ as an input, the hadronic form factor is evaluated to be ${f}_{+}^{{K}^{0}}\\left(0\\right)=0.636\u00b10.04{9}_{\\mathrm{stat}}\u00b10.01{3}_{\\mathrm{syst}}$. The branching fraction and form factor measurements are factors of 1.6 and 1.7 more precise than the previous world averages, respectively.</p>", 
  "author": [
    {
      "family": "CERN \u0130\u015fbirli\u011fi"
    }
  ], 
  "container_title": "Physical Review D", 
  "id": "274673", 
  "issue": "5", 
  "issued": {
    "date-parts": [
      [
        2024, 
        9, 
        30
      ]
    ]
  }, 
  "title": "Improved measurement of the semileptonic decay ${D}_{s}^{+}\\to {K}^{0}{e}^{+}{\\nu }_{e}$", 
  "type": "article-journal", 
  "volume": "110"
}