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Direct top-quark decay width measurement in the t(t)over-bar lepton plus jets channel at root s=8 TeV with the ATLAS experiment
Uppsala University, Disciplinary Domain of Science and Technology, Physics, Department of Physics and Astronomy, High Energy Physics.
Uppsala University, Disciplinary Domain of Science and Technology, Physics, Department of Physics and Astronomy, High Energy Physics. Georg August Univ, Phys Inst 2, Gottingen, Germany.
Uppsala University, Disciplinary Domain of Science and Technology, Physics, Department of Physics and Astronomy, High Energy Physics.
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Number of Authors: 29012018 (English)In: European Physical Journal C, ISSN 1434-6044, E-ISSN 1434-6052, Vol. 78, article id 129Article in journal (Refereed) Published
Abstract [en]

This paper presents a direct measurement of the decay width of the top quark using t (t) over bar 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, Gamma(t) = 1.76 +/- 0.33 (stat.) (+0.79)(-0.68) (syst.) GeV for a top-quark mass of 172.5 GeV, is consistent with the prediction of the Standard Model.

Place, publisher, year, edition, pages
2018. Vol. 78, article id 129
National Category
Subatomic Physics
Identifiers
URN: urn:nbn:se:uu:diva-349823DOI: 10.1140/epjc/s10052-018-5595-5ISI: 000425393800001OAI: oai:DiVA.org:uu-349823DiVA, id: diva2:1202949
Funder
Swedish Research CouncilWallenberg FoundationsGerman Research Foundation (DFG)EU, European Research CouncilEU, Horizon 2020EU, FP7, Seventh Framework Programme
Note

ATLAS Collaboration. For a complete list of authors see: http://dx.doi.org/10.1140/epjc/s10052-018-5595-5

Available from: 2018-05-02 Created: 2018-05-02 Last updated: 2018-05-02Bibliographically approved

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Bergeås, Elin KuutmannBokan, PetarBrenner, RichardEkelöf, TordEllert, MattiasFerrari, ArnaudGradin, P.O. JoakimIsacson, MaxMårtensson, MikaelÖhman, HenrikRangel-Smith, CamillaSales De Bruin, Pedro

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Bergeås, Elin KuutmannBokan, PetarBrenner, RichardEkelöf, TordEllert, MattiasFerrari, ArnaudGradin, P.O. JoakimIsacson, MaxMårtensson, MikaelÖhman, HenrikRangel-Smith, CamillaSales De Bruin, Pedro
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High Energy Physics
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European Physical Journal C
Subatomic Physics

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