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Title

Direct top-quark decay width measurement in the tt¯ lepton+jets channel at √s = 8 TeV with the ATLAS experiment

CollaborationWith : Akilli, Ece / Ancu, Lucian Stefan / Benoit, Mathieu / Calace, Noemi / Clark, Allan Geoffrey / Coccaro, Andrea / Della Volpe, Domenico / Di Bello, Francesco / Dubreuil, Arnaud / Ferrere, Didier / Golling, Tobias / Gonzalez Sevilla, Sergio / Iacobucci, Giuseppe / Jansky, Roland / Katre, Akshay / Khoo, Teng Jian / Lanfermann, Marie Christine / Lionti, Anthony Eric / March Ruiz, Luis / Mermod, Philippe / Nackenhorst, Olaf / Pandini, Carlo / Paolozzi, Lorenzo / Schramm, Steven / Sfyrla, Anna / Valente, Marco / Wu, Xin
Published in European Physical Journal. C. 2018, vol. 78, no. 2, p. 129
Collection Open Access - SCOAP3
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.)-0.68+0.79(syst.)GeV for a top-quark mass of 172.5 GeV, is consistent with the prediction of the Standard Model.
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ATLAS COLLABORATION. Direct top-quark decay width measurement in the tt¯ lepton+jets channel at √s = 8 TeV with the ATLAS experiment. In: European Physical Journal. C, 2018, vol. 78, n° 2, p. 129. https://archive-ouverte.unige.ch/unige:102645

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Deposited on : 2018-03-02

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