Please use this identifier to cite or link to this item: http://hdl.handle.net/2440/102634
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Type: Journal article
Title: Measurement of the top quark mass in the tt → lepton+jets and tt⁻ → dilepton channels using √s = 7 TeV ATLAS data
Other Titles: Measurement of the top quark mass in the tt -> lepton+jets and tt(-) -> dilepton channels using root s = 7 TeV ATLAS data
Author: Aad, G.
Abbott, B.
Abdallah, J.
Abdinov, O.
Aben, R.
Abolins, M.
Abouzeid, O.
Abramowicz, H.
Abreu, H.
Abreu, R.
Abulaiti, Y.
Acharya, B.
Adamczyk, L.
Adams, D.
Adelman, J.
Adomeit, S.
Adye, T.
Affolder, A.
Agatonovic-Jovin, T.
Aguilar-Saavedra, J.
et al.
Citation: European Physical Journal C, 2015; 75(7):330-1-330-36
Publisher: Springer
Issue Date: 2015
ISSN: 1434-6044
1434-6052
Statement of
Responsibility: 
G. Aad ... P. Jackson ... L. Lee ... A. Petridis ... N. Soni ... M.J. White ... et al. (ATLAS Collaboration)
Abstract: The top quark mass was measured in the channels tt⁻ → lepton+jets and tt⁻→ dilepton (lepton = e,μ) based on ATLAS data recorded in 2011. The data were taken at theLHCwith a proton–proton centre-of-mass energy of √ s = 7 TeV and correspond to an integrated luminosity of 4.6 fb⁻¹. The tt⁻ → lepton+jets analysis uses a three-dimensional template technique which determines the top quark mass together with a global jet energy scale factor (JSF), and a relative b-to-light-jet energy scale factor (bJSF), where the terms b-jets and light-jets refer to jets originating from b-quarks and u, d, c, s-quarks or gluons, respectively. The analysis of the tt⁻ → dilepton channel exploits a one-dimensional template method using the mlb observable, defined as the average invariant mass of the two lepton+b-jet pairs in each event. The top quark mass is measured to be 172.33±0.75(stat + JSF + bJSF)± 1.02(syst) GeV, and 173.79 ± 0.54(stat) ± 1.30(syst) GeV in the tt⁻ → lepton+jets and tt⁻ → dilepton channels, respectively. The combination of the two results yields mtop = 172.99 ± 0.48(stat) ± 0.78(syst) GeV, with a total uncertainty of 0.91 GeV.
Keywords: ATLAS Collaboration; ATLAS Collaboration; ATLAS Collaboration
Rights: © CERN for the benefit of the ATLAS collaboration 2015. This article is published with open access at Springerlink.com. This article is distributed under the terms of the Creative Commons Attribution 4.0 International License (http://creativecommons.org/licenses/by/4.0/), which permits unrestricted use, distribution, and reproduction in any medium, provided you give appropriate credit to the original author(s) and the source, provide a link to the Creative Commons license, and indicate if changes were made. Funded by SCOAP3.
RMID: 0030032717
DOI: 10.1140/epjc/s10052-015-3544-0
Appears in Collections:Physics publications

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