15 Ekim 2024 Dergi makalesi Açık Erişim

CERN İşbirliği

Citation Style Language JSON

{
  "DOI": "10.1140/epjc/s10052-024-13114-9", 
  "abstract": "<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>", 
  "author": [
    {
      "family": "CERN \u0130\u015fbirli\u011fi"
    }
  ], 
  "container_title": "European Physical Journal C", 
  "id": "274651", 
  "issue": "10", 
  "issued": {
    "date-parts": [
      [
        2024, 
        10, 
        15
      ]
    ]
  }, 
  "title": "Observation of the     ${\\Lambda }_{\\text{b}}^{0}\\to \\text{J}/\\psi {\\Xi }^{-}{\\text{K}}^{+}$   decay", 
  "type": "article-journal", 
  "volume": "84"
}