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

M. Aaboud; G. Aad; B. Abbott; O. Abdinov; B Abeloos; S.H. Abidi; Ossama Sherif Alexander Abouzeid; NL Abraham; H. Abramowicz; H. Abreu; R. Abreu; Y. Abulaiti; B.S. Acharya; Shin-ichi Adachi; L. Adamczyk; J. Adelman; M. Adersberger; T. Adye; A. A. Affolder; Y.  Afik; T. Agatonovic-Jovin; C. Agheorghiesei; J. A. Aguilar-Saavedra; S. P. Ahlen; Alejandro Alonso Diaz; Mogens Dam; Milena Bajic; Geert-Jan Besjes; Peter Henrik Hansen; Stefania Xella; James William Monk; Fabian Alexander Jürgen Thiele; Troels Christian Petersen; Jørn Dines Hansen; Simon Holm Stark; Gorm Aske Gram Krohn Galster; Graig Wiglesworth; Flavia de Almeida Dias; Jørgen Beck Hansen

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

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

M. Aaboud, G. Aad, B. Abbott, O. Abdinov, B Abeloos, S.H. Abidi, Ossama Sherif Alexander Abouzeid, NL Abraham, H. Abramowicz, H. Abreu, R. Abreu, Y. Abulaiti, B.S. Acharya, Shin-ichi Adachi, L. Adamczyk, J. Adelman, M. Adersberger, T. Adye, A. A. Affolder, Y. AfikT. Agatonovic-Jovin, C. Agheorghiesei, J. A. Aguilar-Saavedra, S. P. Ahlen, Alejandro Alonso Diaz, Mogens Dam, Milena Bajic, Geert-Jan Besjes, Peter Henrik Hansen, Stefania Xella, James William Monk, Fabian Alexander Jürgen Thiele, Troels Christian Petersen, Jørn Dines Hansen, Simon Holm Stark, Gorm Aske Gram Krohn Galster, Graig Wiglesworth, Flavia de Almeida Dias, Jørgen Beck Hansen

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

Originalsprog	Engelsk
Artikelnummer	129
Tidsskrift	European Physical Journal C
Vol/bind	78
Udgave nummer	2
Antal sider	30
ISSN	1434-6044
DOI	https://doi.org/10.1140/epjc/s10052-018-5595-5
Status	Udgivet - 1 feb. 2018

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10.1140/epjc/s10052-018-5595-5Licens: CC BY

Aaboud2018_Article_DirectTop-quarkDecayWidthMeasuForlagets udgivne version, 1,8 MBLicens: CC BY

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Aaboud, M., Aad, G., Abbott, B., Abdinov, O., Abeloos, B., Abidi, S. H., Abouzeid, O. S. A., Abraham, NL., Abramowicz, H., Abreu, H., Abreu, R., Abulaiti, Y., Acharya, B. S., Adachi, S., Adamczyk, L., Adelman, J., Adersberger, M., Adye, T., Affolder, A. A., ... Hansen, J. B. (2018). 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. European Physical Journal C, 78(2), Artikel 129. https://doi.org/10.1140/epjc/s10052-018-5595-5

Aaboud, M, Aad, G, Abbott, B, Abdinov, O, Abeloos, B, Abidi, SH, Abouzeid, OSA, Abraham, NL, Abramowicz, H, Abreu, H, Abreu, R, Abulaiti, Y, Acharya, BS, Adachi, S, Adamczyk, L, Adelman, J, Adersberger, M, Adye, T, Affolder, AA, Afik, Y, Agatonovic-Jovin, T, Agheorghiesei, C, Aguilar-Saavedra, JA, Ahlen, SP, Alonso Diaz, A, Dam, M, Bajic, M, Besjes, G-J, Hansen, PH , Xella, S, Monk, JW, Thiele, FAJ, Petersen, TC , Hansen, JD, Stark, SH, Galster, GAGK, Wiglesworth, G, de Almeida Dias, F & Hansen, JB 2018, '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', European Physical Journal C, bind 78, nr. 2, 129. https://doi.org/10.1140/epjc/s10052-018-5595-5

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title = "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",

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.",

author = "M. Aaboud and G. Aad and B. Abbott and O. Abdinov and B Abeloos and S.H. Abidi and Abouzeid, {Ossama Sherif Alexander} and NL Abraham and H. Abramowicz and H. Abreu and R. Abreu and Y. Abulaiti and B.S. Acharya and Shin-ichi Adachi and L. Adamczyk and J. Adelman and M. Adersberger and T. Adye and Affolder, {A. A.} and Y. Afik and T. Agatonovic-Jovin and C. Agheorghiesei and Aguilar-Saavedra, {J. A.} and Ahlen, {S. P.} and {Alonso Diaz}, Alejandro and Mogens Dam and Milena Bajic and Geert-Jan Besjes and Hansen, {Peter Henrik} and Stefania Xella and Monk, {James William} and Thiele, {Fabian Alexander J{\"u}rgen} and Petersen, {Troels Christian} and Hansen, {J{\o}rn Dines} and Stark, {Simon Holm} and Galster, {Gorm Aske Gram Krohn} and Graig Wiglesworth and {de Almeida Dias}, Flavia and Hansen, {J{\o}rgen Beck}",

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AU - Aaboud, M.

AU - Aad, G.

AU - Abbott, B.

AU - Abdinov, O.

AU - Abeloos, B

AU - Abidi, S.H.

AU - Abouzeid, Ossama Sherif Alexander

AU - Abraham, NL

AU - Abramowicz, H.

AU - Abreu, H.

AU - Abreu, R.

AU - Abulaiti, Y.

AU - Acharya, B.S.

AU - Adachi, Shin-ichi

AU - Adamczyk, L.

AU - Adelman, J.

AU - Adersberger, M.

AU - Adye, T.

AU - Affolder, A. A.

AU - Afik, Y.

AU - Agatonovic-Jovin, T.

AU - Agheorghiesei, C.

AU - Aguilar-Saavedra, J. A.

AU - Ahlen, S. P.

AU - Alonso Diaz, Alejandro

AU - Dam, Mogens

AU - Bajic, Milena

AU - Besjes, Geert-Jan

AU - Hansen, Peter Henrik

AU - Xella, Stefania

AU - Monk, James William

AU - Thiele, Fabian Alexander Jürgen

AU - Petersen, Troels Christian

AU - Hansen, Jørn Dines

AU - Stark, Simon Holm

AU - Galster, Gorm Aske Gram Krohn

AU - Wiglesworth, Graig

AU - de Almeida Dias, Flavia

AU - Hansen, Jørgen Beck

PY - 2018/2/1

Y1 - 2018/2/1

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

U2 - 10.1140/epjc/s10052-018-5595-5

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

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VL - 78

JO - European Physical Journal C

JF - European Physical Journal C

IS - 2

M1 - 129

ER -

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

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