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|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|
|Citation:||European Physical Journal C, 2017; 77(11):804-1-804-66|
|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.|
|Rights:||© CERN for the benefit of the ATLAS collaboration 2017. This article is an open access publication|
|Appears in Collections:||Physics publications|
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