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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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SYSNO ASEP 0499934 Document Type J - Journal Article R&D Document Type Journal Article Subsidiary J Článek ve WOS Title Direct top-quark decay width measurement in the tt¯ lepton + jets channel at √s =8 TeV with the ATLAS experiment Author(s) Aaboud, M. (MA)
Aad, G. (FR)
Abbott, B. (US)
Chudoba, Jiří (FZU-D) RID, ORCID
Hejbal, Jiří (FZU-D) RID, ORCID
Hladík, Ondřej (FZU-D) ORCID
Jakoubek, Tomáš (FZU-D) RID, ORCID
Kepka, Oldřich (FZU-D) RID, ORCID
Kroll, Jiří (FZU-D) ORCID
Kupčo, Alexander (FZU-D) RID, ORCID
Lokajíček, Miloš (FZU-D) RID, ORCID
Lysák, Roman (FZU-D) RID, ORCID
Marčišovský, Michal (FZU-D) RID, ORCID
Mikeštíková, Marcela (FZU-D) RID, ORCID
Němeček, Stanislav (FZU-D) RID, ORCID
Penc, Ondřej (FZU-D) ORCID
Šícho, Petr (FZU-D) RID, ORCID
Staroba, Pavel (FZU-D) RID, ORCID
Svatoš, Michal (FZU-D) RID, ORCID
Taševský, Marek (FZU-D) RID, ORCIDNumber of authors 2899 Article number 129 Source Title European Physical Journal C. - : Springer - ISSN 1434-6044
Roč. 78, č. 2 (2018), s. 1-30Number of pages 30 s. Publication form Print - P Language eng - English Country DE - Germany Keywords ATLAS ; CERN LHC Coll ; kinematics ; numerical calculations: Monte Carlo ; experimental results ; 8000 GeV-cms Subject RIV BF - Elementary Particles and High Energy Physics OECD category Particles and field physics R&D Projects LTT17018 GA MŠMT - Ministry of Education, Youth and Sports (MEYS) Institutional support FZU-D - RVO:68378271 UT WOS 000425393800001 EID SCOPUS 85042217176 DOI 10.1140/epjc/s10052-018-5595-5 Annotation 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.
Workplace Institute of Physics Contact Kristina Potocká, potocka@fzu.cz, Tel.: 220 318 579 Year of Publishing 2019
Number of the records: 1