17 Ekim 2024 Dergi makalesi Açık Erişim

CERN İşbirliği

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    "description": "<p>The inclusive cross section for the production of a single top quark in association with a $W$ boson is measured using $140\\text{}\\text{}{\\mathrm{fb}}^{-1}$ of proton-proton collision data collected with the ATLAS detector at $\\sqrt{s}=13\\text{}\\text{}\\mathrm{TeV}$. Events containing two charged leptons and at least one jet identified as originating from a $b$-quark are selected. A multivariate discriminant is constructed to separate the $tW$ signal from the $t\\overline{t}$ background. The cross section is extracted using a profile likelihood fit to the signal and control regions and it is measured to be ${\\sigma }_{tW}=7{5}_{-14}^{+15}\\text{}\\text{}\\mathrm{pb}$, in good agreement with the Standard Model prediction. The measured cross section is used to extract a value for the left-handed form factor at the $Wtb$ vertex times the Cabibbo-Kobayashi-Maskawa matrix element $|{f}_{\\mathrm{LV}}{V}_{tb}|$ of $0.97\u00b10.10$.</p>", 
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      "title": "Physical Review D", 
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    "title": "Measurement of single top-quark production in association with a $W$ boson in $pp$ collisions at $\\sqrt{s}=13\\text{}\\text{}\\mathrm{TeV}$ with the ATLAS detector"
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