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

ATLAS Collaboration

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

Scientific article

Open access

English

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

ContributorsATLAS Collaboration

Published inThe European Physical Journal. C, Particles and Fields, vol. 78, no. 2, 129

Collection

Open Access - SCOAP3

Publication date2018

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.

Affiliation

Faculté des sciences / Section de physique / Département de physique nucléaire et corpusculaire

Citation (ISO format)

ATLAS Collaboration. Direct top-quark decay width measurement in the tt¯ lepton+jets channel at √s = 8 TeV with the ATLAS experiment. In: The European Physical Journal. C, Particles and Fields, 2018, vol. 78, n° 2, p. 129. doi: 10.1140/epjc/s10052-018-5595-5

Article (Published version)

CC BY

Identifiers

PID : unige:102645
DOI : 10.1140/epjc/s10052-018-5595-5

ISSN of the journal1434-6044

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Creation02/03/2018 14:32:14

First validation02/03/2018 14:32:14

Update time15/03/2023 07:55:35

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

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