Publication: Direct top-quark decay width measurement in the t t ̄ lepton+jets channel at √s = 8 TeV with the ATLAS experiment
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2018-02
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Springer Science and Business Media LLC
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ATLAS Collaboration. Direct top-quark decay width measurement in the t t ̄ lepton+jets channel at √s = 8 TeV with the ATLAS experiment. Eur. Phys. J. C , 2018.
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Abstract
This paper presents a direct measurement of the decay width of the top quark using tt ̄ events in the lepton+jets final state. The data sample was collected by the ATLAS detector at the LHC in proton–proton collisions at a centre-of-mass energy of 8 TeV and corresponds to an integrated luminosity of 20.2 fb−1. The decay width of the top quark is measured using a template fit to distributions of kinematic observables associated with the hadronically and semileptonically decaying top quarks. The result, Γt = 1.76 ± 0.33 (stat.) +0.79 (syst.) GeV −0.68 for a top-quark mass of 172.5 GeV, is consistent with the prediction of the Standard Model.
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Physics and Astronomy (miscellaneous), Engineering (miscellaneous)