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

M. Aaboud; Paul Newman; ATLAS Collaboration; Chris Hawkes

doi:10.1140/epjc/s10052-018-5595-5

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

M. Aaboud, Paul Newman, ATLAS Collaboration, Chris Hawkes

Physics and Astronomy

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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.) +0.79−0.68 (syst.) GeV for a top-quark mass of 172.5 GeV, is consistent with the prediction of the Standard Model.

Original language	English
Article number	129
Journal	European Physical Journal C
Volume	78
DOIs	https://doi.org/10.1140/epjc/s10052-018-5595-5
Publication status	Published - 15 Feb 2018

Bibliographical note

44 pages in total, author list starting page 28, 6 figures, 3 tables, published in EPJC, All figures including auxiliary figures are available at https://atlas.web.cern.ch/Atlas/GROUPS/PHYSICS/PAPERS/TOPQ-2017-02/

Keywords

hep-ex

Access to Document

10.1140/epjc/s10052-018-5595-5Licence: Creative Commons: Attribution (CC BY)

Aaboud_et_al_Direct_top-quark_decay_EPJC_2018Final published version, 2.42 MBLicence: Creative Commons: Attribution (CC BY)

https://doi.org/10.1140/epjc/s10052-018-5595-5Licence: Creative Commons: Attribution (CC BY)

Cite this

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

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.) +0.79−0.68 (syst.) GeV for a top-quark mass of 172.5 GeV, is consistent with the prediction of the Standard Model.",

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author = "M. Aaboud and Paul Newman and {ATLAS Collaboration} and Chris Hawkes",

note = "44 pages in total, author list starting page 28, 6 figures, 3 tables, published in EPJC, All figures including auxiliary figures are available at https://atlas.web.cern.ch/Atlas/GROUPS/PHYSICS/PAPERS/TOPQ-2017-02/",

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T1 - Direct top-quark decay width measurement in the tt¯tt¯ lepton+jets channel at s√=8 TeV with the ATLAS experiment

AU - Aaboud, M.

AU - Newman, Paul

AU - ATLAS Collaboration

AU - Hawkes, Chris

N1 - 44 pages in total, author list starting page 28, 6 figures, 3 tables, published in EPJC, All figures including auxiliary figures are available at https://atlas.web.cern.ch/Atlas/GROUPS/PHYSICS/PAPERS/TOPQ-2017-02/

PY - 2018/2/15

Y1 - 2018/2/15

N2 - 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.) +0.79−0.68 (syst.) GeV for a top-quark mass of 172.5 GeV, is consistent with the prediction of the Standard Model.

AB - 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.) +0.79−0.68 (syst.) GeV for a top-quark mass of 172.5 GeV, is consistent with the prediction of the Standard Model.

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DO - 10.1140/epjc/s10052-018-5595-5

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