Measurement of the charge asymmetry in top-quark pair production in the lepton-plus-jets final state in pp collision data at $\sqrt{s}=8\,\mathrm TeV{}$ with the ATLAS detector - INSPIRE

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Measurement of the charge asymmetry in top-quark pair production in the lepton-plus-jets final state in pp collision data at $\sqrt{s}=8\,\mathrm TeV{}$ with the ATLAS detector

ATLAS

Collaboration

Sep 8, 2015

45 pages

Published in:

Eur.Phys.J.C 76 (2016) 2, 87,
Eur.Phys.J.C 77 (2017) 564 (erratum)

Published: Feb 19, 2016

e-Print:

1509.02358 [hep-ex]

DOI:

10.1140/epjc/s10052-016-3910-6,
10.1140/epjc/s10052-017-5089-x (erratum)

PDG:

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

Charge Asymmetry (A

_{C}

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

\sqrt {s }

Report number:

CERN-PH-EP-2015-217

Experiments:

CERN-LHC-ATLAS

View in:

reference search75 citations

Citations per year

Abstract: (Springer)

This paper reports inclusive and differential measurements of the

t\bar{t}

charge asymmetry

A_{\text {C}}

in

20.3~{\mathrm{fb}^{-1}}

of

\sqrt{s} = 8~\mathrm TeV{}

pp

collisions recorded by the ATLAS experiment at the Large Hadron Collider at CERN. Three differential measurements are performed as a function of the invariant mass, transverse momentum and longitudinal boost of the

t\bar{t}

system. The

t\bar{t}

pairs are selected in the single-lepton channels (e or

\mu

) with at least four jets, and a likelihood fit is used to reconstruct the

t\bar{t}

event kinematics. A Bayesian unfolding procedure is performed to infer the asymmetry at parton level from the observed data distribution. The inclusive

t\bar{t}

charge asymmetry is measured to be

A_{\text {C}}{} = 0.009 \pm 0.005

(stat.

+

syst.). The inclusive and differential measurements are compatible with the values predicted by the Standard Model.

Note:

29 pages plus author list (45 pages total), 4 figures, 5 tables, published version including corrections from erratum, all figures including auxiliary figures are available at https://atlas.web.cern.ch/Atlas/GROUPS/PHYSICS/PAPERS/TOPQ-2014-16/

p p: scattering
p p: colliding beams
top: pair production
charge: asymmetry: measured
ATLAS
transverse momentum dependence
mass spectrum: (2top)
mass dependence
CERN LHC Coll
longitudinal

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