Measurement of Lepton Differential Distributions and the Top Quark Mass in tt̅ Production in pp Collisions at √s=8 TeV with the ATLAS Detector

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Measurement of Lepton Differential Distributions and the Top Quark Mass in tt̅ Production in pp Collisions at √s=8 TeV with the ATLAS Detector

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Title: Measurement of Lepton Differential Distributions and the Top Quark Mass in tt̅ Production in pp Collisions at √s=8 TeV with the ATLAS Detector
Author(s):
Aaboud, M.;
Aad, G.;
Abbott, B.;
Abdinov, O.;
Abeloos, B.;
Abidi, S. H.;
AbouZeid, O. S.;
Izen, Joseph M.;
Meirose, Bernhard;
Reeves, Kendall;
ATLAS Collaboration
Date Created: 2017-11
Item Type: article
Keywords: Show Keywords
Abstract: This paper presents single lepton and dilepton kinematic distributions measured in dileptonic tt̅ events produced in 20.2 fb⁻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 m(t)(pole) = 173.2 ± 0.9 ± 0.8 ± 1.2 GeV, where the three uncertainties arise from data statistics, experimental systematics, and theoretical sources.
Publisher: Springer
ISSN: 1434-6044
Source: European Physical Journal C
Link to Related Resource: http://dx.doi.org/10.1140/epjc/s10052-017-5349-9
Persistent Link: http://hdl.handle.net/10735.1/6158
Bibliographic Citation: Aaboud, M., G. Aad, B. Abbott, O. Abdinov, et al. 2017. "Measurement of lepton differential distributions and the top quark mass in tt̅ production in pp collisions at √s = 8 TeV with the ATLAS detector." European Physical Journal C 77(11), doi:10.1140/epjc/s10052-017-5349-9
Terms of Use: CC BY 4.0 (Attribution)
©2017 CERN, for the ATLAS Collaboration

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