15 Ekim 2024 Dergi makalesi Açık Erişim

CERN İşbirliği

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{
  "@context": "https://schema.org/", 
  "@id": 274651, 
  "@type": "ScholarlyArticle", 
  "creator": [
    {
      "@type": "Person", 
      "affiliation": "CERN", 
      "name": "CERN \u0130\u015fbirli\u011fi"
    }
  ], 
  "datePublished": "2024-10-15", 
  "description": "<p>Using proton\u2013proton collision data corresponding to an integrated luminosity of     $140\\phantom{\\rule{0.333333em}{0ex}}{\\text{fb}}^{-1}$   collected by the CMS experiment at     $\\sqrt{s}=13\\phantom{\\rule{0.166667em}{0ex}}\\text{Te}\\phantom{\\rule{-0.80002pt}{0ex}}\\text{V}$  , the     ${\\Lambda }_{\\text{b}}^{0}\\to \\text{J}/\\psi {\\Xi }^{-}{\\text{K}}^{+}$   decay is observed for the first time, with a statistical significance exceeding 5 standard deviations. The relative branching fraction, with respect to the     ${\\Lambda }_{\\text{b}}^{0}\\to \\psi \\left(2\\text{S}\\right)\\Lambda $   decay, is measured to be     $B\\left({\\Lambda }_{\\text{b}}^{0}\\to \\text{J}/\\psi {\\Xi }^{-}{\\text{K}}^{+}\\right)/B\\left({\\Lambda }_{\\text{b}}^{0}\\to \\psi \\left(2\\text{S}\\right)\\Lambda \\right)=\\left[3.38\u00b11.02\u00b10.61\u00b10.03\\right]%$  , where the first uncertainty is statistical, the second is systematic, and the third is related to the uncertainties in     $B\\left(\\psi \\left(2\\text{S}\\right)\\to \\text{J}/\\psi {\\pi }^{+}{\\pi }^{-}\\right)$   and     $B\\left({\\Xi }^{-}\\to \\Lambda {\\pi }^{-}\\right)$  .</p>", 
  "headline": "Observation of the     ${\\Lambda }_{\\text{b}}^{0}\\to \\text{J}/\\psi {\\Xi }^{-}{\\text{K}}^{+}$   decay", 
  "identifier": 274651, 
  "image": "https://aperta.ulakbim.gov.tr/static/img/logo/aperta_logo_with_icon.svg", 
  "license": "http://www.opendefinition.org/licenses/cc-by", 
  "name": "Observation of the     ${\\Lambda }_{\\text{b}}^{0}\\to \\text{J}/\\psi {\\Xi }^{-}{\\text{K}}^{+}$   decay", 
  "url": "https://aperta.ulakbim.gov.tr/record/274651"
}