Aaboud, M;
Aad, G;
Abbott, B;
Abdinov, O;
Abeloos, B;
Abidi, SH;
AbouZeid, OS;
... Zwalinski, L; + view all
(2017)
Measurement of lepton differential distributions and the top quark mass in tt¯ production in pp collisions at s√=8 TeV with the ATLAS detector.
The European Physical Journal C
, 77
(11)
, Article 804. 10.1140/epjc/s10052-017-5349-9.
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Abstract
This paper presents single lepton and dilepton kinematic distributions measured in dileptonic tt¯tt¯ events produced in 20.2 fb−1fb−1 of s√=8s=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 eμeμ 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±1.2mtpole=173.2±0.9±0.8±1.2 GeV, where the three uncertainties arise from data statistics, experimental systematics, and theoretical sources.
| Type: | 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 |
| Open access status: | An open access version is available from UCL Discovery |
| DOI: | 10.1140/epjc/s10052-017-5349-9 |
| Publisher version: | http://dx.doi.org/10.1140/epjc/s10052-017-5349-9 |
| Language: | English |
| Keywords: | Science & Technology, Physical Sciences, Physics, Particles & Fields, Physics, CARLO EVENT GENERATOR, PARTON DISTRIBUTIONS, HADRON COLLIDERS, CROSS-SECTION, PLUS PLUS, LHC, PAIR, T(T)OVER-BAR, TEVATRON, PHYSICS |
| UCL classification: | UCL UCL > Provost and Vice Provost Offices > UCL BEAMS UCL > Provost and Vice Provost Offices > UCL BEAMS > Faculty of Maths and Physical Sciences UCL > Provost and Vice Provost Offices > UCL BEAMS > Faculty of Maths and Physical Sciences > Dept of Physics and Astronomy |
| URI: | https://discovery-pp.ucl.ac.uk/id/eprint/10040053 |
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