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Type: Journal article
Title: Measurement of lepton differential distributions and the top quark mass in tt¯ production in pp collisions at √s=8 TeV with the ATLAS detector
Other Titles: Measurement of lepton differential distributions and the top quark mass in tt -bar production in pp collisions at root s=8 TeV with the ATLAS detector
Author: Aaboud, M.
Aad, G.
Abbott, B.
Abdinov, O.
Abeloos, B.
Abidi, S.
AbouZeid, O.
Abraham, N.
Abramowicz, H.
Abreu, H.
Abreu, R.
Abulaiti, Y.
Acharya, B.
Adachi, S.
Adamczyk, L.
Adelman, J.
Adersberger, M.
Adye, T.
Affolder, A.
Afik, Y.
et al.
Citation: European Physical Journal C: Particles and Fields, 2017; 77(11):804-1-804-66
Publisher: Springer
Issue Date: 2017
ISSN: 1434-6044
Statement of
M. Aaboud ... P. Jackson ... A. Petridis ... M.J. White ... [et al.] (The ATLAS Collaboration)
Abstract: This paper presents single lepton and dilepton kinematic distributions measured in dileptonic tt¯ events produced in 20.2fb−1 of s√=8 TeV pp collisions recorded by the ATLAS experiment at the LHC. Both absolute and normalised differential cross-sections are measured, using events with an opposite-charge eμ pair and one or two b-tagged jets. The cross-sections are measured in a fiducial region corresponding to the detector acceptance for leptons, and are compared to the predictions from a variety of Monte Carlo event generators, as well as fixed-order QCD calculations, exploring the sensitivity of the cross-sections to the gluon parton distribution function. Some of the distributions are also sensitive to the top quark pole mass; a combined fit of NLO fixed-order predictions to all the measured distributions yields a top quark mass value of mpolet=173.2±0.9±0.8±1.2 GeV, where the three uncertainties arise from data statistics, experimental systematics, and theoretical sources.
Keywords: ATLAS Collaboration
Rights: © CERN for the benefit of the ATLAS collaboration 2017. This article is an open access publication
DOI: 10.1140/epjc/s10052-017-5349-9
Grant ID: ARC
Published version:
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