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

Rimoldi, Marco; Mullier, Geoffrey; Miucci, Antonio; Merlassino, Claudia; Haug, Sigve; Weber, Michael; Meloni, Federico; Beck, Hans Peter; Ereditato, Antonio (2018). Direct top-quark decay width measurement in the tt̅ lepton+jets channel at √s = 8 TeV with the ATLAS experiment. European physical journal. C - particles and fields, 78(2) EDP Sciences 10.1140/epjc/s10052-018-5595-5

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This paper presents a direct measurement of the decay width of the top quark using tt̅ 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.

Item Type:

Journal Article (Original Article)

Division/Institute:

08 Faculty of Science > Physics Institute > Laboratory for High Energy Physics (LHEP)

UniBE Contributor:

Haug, Sigve; Weber, Michael and Beck, Hans Peter

Subjects:

500 Science > 530 Physics

ISSN:

1434-6044

Publisher:

EDP Sciences

Language:

English

Submitter:

BORIS Import LHEP

Date Deposited:

27 Jun 2019 16:23

Last Modified:

10 Mar 2021 05:09

Publisher DOI:

10.1140/epjc/s10052-018-5595-5

Additional Information:

Kollaboration - Es sind nur die Berner Autoren erwaehnt

BORIS DOI:

10.7892/boris.129112

URI:

https://boris.unibe.ch/id/eprint/129112

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