Measurement of the top-quark mass in tt 1-jet events collected with the ATLAS detector in pp collisions at=8 TeV



Aaboud, M, Aad, G, Abbott, B, Abdinov, O, Abud, A Abed, Abeling, K, Abhayasinghe, DK, Abidi, SH, AbouZeid, OS, Abraham, NL
et al (show 2912 more authors) (2019) Measurement of the top-quark mass in tt 1-jet events collected with the ATLAS detector in pp collisions at=8 TeV JOURNAL OF HIGH ENERGY PHYSICS, 2019 (11). 150-. ISSN 1029-8479, 1029-8479

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Abstract

A determination of the top-quark mass is presented using 20.2 fb−1 of 8 TeV proton-proton collision data produced by the Large Hadron Collider and collected by the ATLAS experiment. The normalised differential cross section of top-quark pair production in association with an energetic jet is measured in the lepton+jets final state and unfolded to parton and particle levels. The unfolded distribution at parton level can be described using next-to-leading-order QCD predictions in terms of either the top-quark pole mass or the running mass as defined in the (modified) minimal subtraction scheme. A comparison between the experimental distribution and the theoretical prediction allows the top-quark mass to be extracted in the two schemes. The value obtained for the pole-mass scheme is: mtpole=171.1±0.4(stat)±0.9(syst)−0.3+0.7(theo)GeV The extracted value in the running-mass scheme is: mt(mt)=162.9±0.5(stat)±1.0(syst)−1.2+2.1(theo)GeV. The results for the top-quark mass using the two schemes are consistent, when translated from one scheme to the other. [Figure not available: see fulltext.]

Item Type: Article
Additional Information: 39 pages in total, author list starting page 23, 4 figures, 2 tables, published in JHEP. All figures including auxiliary figures are available at http://atlas.web.cern.ch/Atlas/GROUPS/PHYSICS/PAPERS/TOPQ-2017-09
Uncontrolled Keywords: Hadron-Hadron scattering (experiments), Top physics
Depositing User: Symplectic Admin
Date Deposited: 02 Jan 2020 17:03
Last Modified: 22 May 2026 17:11
DOI: 10.1007/JHEP11(2019)150
Open Access URL: https://link.springer.com/article/10.1007%2FJHEP11...
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URI: https://livrepository.liverpool.ac.uk/id/eprint/3068219
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