Measurements of the charge asymmetry in top-quark pair production in the dilepton final state at $\sqrt{s}=8$ TeV with the ATLAS detector - INSPIRE

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Measurements of the charge asymmetry in top-quark pair production in the dilepton final state at $\sqrt{s}=8$ TeV with the ATLAS detector

ATLAS

Collaboration

Apr 19, 2016

31 pages

Published in:

Phys.Rev.D 94 (2016) 3, 032006

Published: Aug 22, 2016

e-Print:

1604.05538 [hep-ex]

DOI:

10.1103/PhysRevD.94.032006

PDG:

{{\mathit t}}{{\overline{\mathit t}}}

Charge Asymmetry (A

_{C}

{{\mathit p}}{{\mathit p}}

\sqrt {s }

Report number:

CERN-EP-2016-051

Experiments:

CERN-LHC-ATLAS

View in:

reference search50 citations

Citations per year

Abstract: (APS)

Measurements of the top-antitop quark pair production charge asymmetry in the dilepton channel, characterized by two high-pT leptons (electrons or muons), are presented using data corresponding to an integrated luminosity of 20.3 fb-1 from pp collisions at a center-of-mass energy 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: ACℓℓ 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 ACℓℓ=0.008±0.006 and ACtt¯=0.021±0.016, which are in agreement with the Standard Model predictions of ACℓℓ=0.0064±0.0003 and ACtt¯=0.0111±0.0004.

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/

p p: scattering
p p: colliding beams
top: pair production
charge: asymmetry: measured
dilepton: final state
phase space
ATLAS
differential cross section: measured
transverse momentum: missing-energy
transverse momentum dependence

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Figures(17)

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