CERN Accelerating science

Article
Report number arXiv:1604.05538 ; CERN-EP-2016-051 ; CERN-EP-2016-051
Title Measurements of the charge asymmetry in top-quark pair production in the dilepton final state at s=8 TeV with the ATLAS detector
Related titleMeasurements of the charge asymmetry in top-quark pair production in the dilepton final state at s=8 TeV with the ATLAS detector
Author(s) ATLAS Collaboration  Zeige alle 2861 Autoren
Publication 2016-08-22
Imprint 19 Apr 2016
Number of pages 31
Note 29 pages plus author list + cover pages (45 pages total), 8 figures, 4 tables, published in Physical Review D, All figures including auxiliary figures are available at http://atlas.web.cern.ch/Atlas/GROUPS/PHYSICS/PAPERS/TOPQ-2015-08/
In: Phys. Rev. D 94 (2016) 032006
DOI 10.1103/PhysRevD.94.032006
Subject category Particle Physics - Experiment
Accelerator/Facility, Experiment CERN LHC ; ATLAS
Free keywords flavor physics ; QCD ; exotics ; top physics ; experimental results
Abstract Measurements of the top--antitop quark pair production charge asymmetry in the dilepton channel are presented using data corresponding to an integrated luminosity of 20.3 fb1 from pp collisions at a center-of-mass energy of s=8 TeV collected with the ATLAS detector at the Large Hadron Collider at CERN. Inclusive and differential measurements as a function of the invariant mass, transverse momentum, and longitudinal boost of the tt¯ system are performed both in the full phase space and in a fiducial phase space closely matching the detector acceptance. Two observables are studied: AC based on the selected leptons and ACtt¯ based on the reconstructed tt¯ final state. The inclusive asymmetries are measured in the full phase space to be AC=0.008±0.006 and ACtt¯=0.021±0.016, which are in agreement with the Standard Model predictions of AC=0.0064±0.0003 and ACtt¯=0.0111±0.0004.
Copyright/License preprint: © 2016-2025 CERN (License: CC-BY-4.0)
publication: © 2016-2025 CERN (License: CC-BY-3.0)



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Email contact: a_ciocio@lbl.gov


 Datensatz erzeugt am 2016-04-19, letzte Änderung am 2024-03-14


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