Measurement of the charge asymmetry in top quark pair production in pp collisions at sqrt(s) = 7 TeV using the ATLAS detector

G. Aad; Nele Maria Philomena Boelaert; Mogens Dam; Jørgen Beck Hansen; Peter Henrik Hansen; Jørn Dines Hansen; John Renner Hansen; Simon Johann Franz Heisterkamp; Esben Bryndt Klinkby; Morten Dam Jørgensen; Sascha Mehlhase; Björn Stefan Nilsson; Troels Christian Petersen; Ask Emil Løvschall-Jensen; Stefania Xella

doi:10.1140/epjc/s10052-012-2039-5

Measurement of the charge asymmetry in top quark pair production in pp collisions at sqrt(s) = 7 TeV using the ATLAS detector

G. Aad, Nele Maria Philomena Boelaert, Mogens Dam, Jørgen Beck Hansen, Peter Henrik Hansen, Jørn Dines Hansen, John Renner Hansen, Simon Johann Franz Heisterkamp, Esben Bryndt Klinkby, Morten Dam Jørgensen, Sascha Mehlhase, Björn Stefan Nilsson, Troels Christian Petersen, Ask Emil Løvschall-Jensen, Stefania Xella

108 Citations (Scopus)

Abstract

A measurement of the top-antitop production charge asymmetry AC is presented using data corresponding to an integrated luminosity of 1.04 fb⁻¹ of pp collisions at √s = 7 TeV collected by the ATLAS detector at the LHC. Events are selected with a single lepton (electron or muon), missing transverse momentum and at least four jets of which at least one jet is identified as coming from a b-quark. A kinematic fit is used to reconstruct the tt event topology. After background subtraction, a Bayesian unfolding procedure is performed to correct for acceptance and detector effects. The measured value of AC is AC =−0.019±0.028 (stat.)±0.024 (syst.), consistent with the prediction from the MC@NLO Monte Carlo generator of AC = 0.006±0.002. Measurements of AC in two ranges of invariant mass of the top-antitop pair are also shown.

Original language	English
Journal	European Physical Journal C
Volume	72
Pages (from-to)	2039
ISSN	1434-6044
DOIs	https://doi.org/10.1140/epjc/s10052-012-2039-5
Publication status	Published - 15 Jun 2012

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Aad, G., Boelaert, N. M. P., Dam, M., Hansen, J. B., Hansen, P. H., Hansen, J. D., Hansen, J. R., Heisterkamp, S. J. F., Klinkby, E. B., Jørgensen, M. D., Mehlhase, S., Nilsson, B. S., Petersen, T. C., Løvschall-Jensen, A. E., & Xella, S. (2012). Measurement of the charge asymmetry in top quark pair production in pp collisions at sqrt(s) = 7 TeV using the ATLAS detector. European Physical Journal C, 72, 2039. https://doi.org/10.1140/epjc/s10052-012-2039-5

Aad, G, Boelaert, NMP, Dam, M , Hansen, JB , Hansen, PH , Hansen, JD , Hansen, JR, Heisterkamp, SJF, Klinkby, EB, Jørgensen, MD, Mehlhase, S, Nilsson, BS, Petersen, TC, Løvschall-Jensen, AE & Xella, S 2012, 'Measurement of the charge asymmetry in top quark pair production in pp collisions at sqrt(s) = 7 TeV using the ATLAS detector', European Physical Journal C, vol. 72, pp. 2039. https://doi.org/10.1140/epjc/s10052-012-2039-5

@article{914517200b40464ab39848b9325a5358,

title = "Measurement of the charge asymmetry in top quark pair production in pp collisions at sqrt(s) = 7 TeV using the ATLAS detector",

abstract = "A measurement of the top-antitop production charge asymmetry AC is presented using data corresponding to an integrated luminosity of 1.04 fb−1 of pp collisions at √s = 7 TeV collected by the ATLAS detector at the LHC. Events are selected with a single lepton (electron or muon), missing transverse momentum and at least four jets of which at least one jet is identified as coming from a b-quark. A kinematic fit is used to reconstruct the tt event topology. After background subtraction, a Bayesian unfolding procedure is performed to correct for acceptance and detector effects. The measured value of AC is AC =−0.019±0.028 (stat.)±0.024 (syst.), consistent with the prediction from the MC@NLO Monte Carlo generator of AC = 0.006±0.002. Measurements of AC in two ranges of invariant mass of the top-antitop pair are also shown.",

author = "G. Aad and Boelaert, {Nele Maria Philomena} and Mogens Dam and Hansen, {J{\o}rgen Beck} and Hansen, {Peter Henrik} and Hansen, {J{\o}rn Dines} and Hansen, {John Renner} and Heisterkamp, {Simon Johann Franz} and Klinkby, {Esben Bryndt} and J{\o}rgensen, {Morten Dam} and Sascha Mehlhase and Nilsson, {Bj{\"o}rn Stefan} and Petersen, {Troels Christian} and L{\o}vschall-Jensen, {Ask Emil} and Stefania Xella",

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doi = "10.1140/epjc/s10052-012-2039-5",

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T1 - Measurement of the charge asymmetry in top quark pair production in pp collisions at sqrt(s) = 7 TeV using the ATLAS detector

AU - Aad, G.

AU - Boelaert, Nele Maria Philomena

AU - Dam, Mogens

AU - Hansen, Jørgen Beck

AU - Hansen, Peter Henrik

AU - Hansen, Jørn Dines

AU - Hansen, John Renner

AU - Heisterkamp, Simon Johann Franz

AU - Klinkby, Esben Bryndt

AU - Jørgensen, Morten Dam

AU - Mehlhase, Sascha

AU - Nilsson, Björn Stefan

AU - Petersen, Troels Christian

AU - Løvschall-Jensen, Ask Emil

AU - Xella, Stefania

PY - 2012/6/15

Y1 - 2012/6/15

N2 - A measurement of the top-antitop production charge asymmetry AC is presented using data corresponding to an integrated luminosity of 1.04 fb−1 of pp collisions at √s = 7 TeV collected by the ATLAS detector at the LHC. Events are selected with a single lepton (electron or muon), missing transverse momentum and at least four jets of which at least one jet is identified as coming from a b-quark. A kinematic fit is used to reconstruct the tt event topology. After background subtraction, a Bayesian unfolding procedure is performed to correct for acceptance and detector effects. The measured value of AC is AC =−0.019±0.028 (stat.)±0.024 (syst.), consistent with the prediction from the MC@NLO Monte Carlo generator of AC = 0.006±0.002. Measurements of AC in two ranges of invariant mass of the top-antitop pair are also shown.

AB - A measurement of the top-antitop production charge asymmetry AC is presented using data corresponding to an integrated luminosity of 1.04 fb−1 of pp collisions at √s = 7 TeV collected by the ATLAS detector at the LHC. Events are selected with a single lepton (electron or muon), missing transverse momentum and at least four jets of which at least one jet is identified as coming from a b-quark. A kinematic fit is used to reconstruct the tt event topology. After background subtraction, a Bayesian unfolding procedure is performed to correct for acceptance and detector effects. The measured value of AC is AC =−0.019±0.028 (stat.)±0.024 (syst.), consistent with the prediction from the MC@NLO Monte Carlo generator of AC = 0.006±0.002. Measurements of AC in two ranges of invariant mass of the top-antitop pair are also shown.

U2 - 10.1140/epjc/s10052-012-2039-5

DO - 10.1140/epjc/s10052-012-2039-5

M3 - Journal article

C2 - 25814837

SN - 1434-6044

VL - 72

SP - 2039

JO - The European Physical Journal C: Particles and Fields

JF - The European Physical Journal C: Particles and Fields

ER -

Measurement of the charge asymmetry in top quark pair production in pp collisions at sqrt(s) = 7 TeV using the ATLAS detector

Abstract

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