Measurement of the charge asymmetry in dileptonic decays of top quark pairs in $pp$ collisions at $\sqrt{s}=7$ TeV using the ATLAS detector

Philip James Clark; Christos Leonidopoulos; Victoria Jane Martin; Corrinne Mills; Atlas Collaboration

doi:10.1007/JHEP05(2015)061

Measurement of the charge asymmetry in dileptonic decays of top quark pairs in $pp$ collisions at $\sqrt{s}=7$ TeV using the ATLAS detector

Philip James Clark, Christos Leonidopoulos, Victoria Jane Martin, Corrinne Mills, Atlas Collaboration

School of Physics and Astronomy

Research output: Contribution to journal › Article › peer-review

Abstract

A measurement of the top-antitop $ \left(t\overline{t}\right) $ charge asymmetry is presented using data corresponding to an integrated luminosity of 4.6 fb$^{−1}$ of LHC pp collisions at a centreof-mass energy of 7 TeV collected by the ATLAS detector. Events with two charged leptons, at least two jets and large missing transverse momentum are selected. Two observables are studied: A$_{C}^{ℓℓ}$ based on the identified charged leptons, and $ {A}_{\mathrm{C}}^{t\overline{t}} $ , based on the reconstructed tt final state. The asymmetries are measured to be $ {A}_{\mathrm{C}}^{\ell \ell }=0.024\pm 0.015\left(\mathrm{stat}.\right)\pm 0.009\left(\mathrm{syst}.\right), $ $ {A}_{\mathrm{C}}^{t\overline{t}}=0.021\pm 0.025\left(\mathrm{stat}.\right)\pm 0.017\left(\mathrm{syst}.\right). $

Original language	English
Article number	Aad:2015jfa
Pages (from-to)	061
Journal	Journal of High Energy Physics
Volume	1505
DOIs	https://doi.org/10.1007/JHEP05(2015)061
Publication status	Published - 12 May 2015

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@article{3b3fd18968c5489d90bd28297fd01df5,

title = "Measurement of the charge asymmetry in dileptonic decays of top quark pairs in $pp$ collisions at $\sqrt{s}=7$ TeV using the ATLAS detector",

abstract = "A measurement of the top-antitop $ \left(t\overline{t}\right) $ charge asymmetry is presented using data corresponding to an integrated luminosity of 4.6 fb$^{−1}$ of LHC pp collisions at a centreof-mass energy of 7 TeV collected by the ATLAS detector. Events with two charged leptons, at least two jets and large missing transverse momentum are selected. Two observables are studied: A$_{C}^{ℓℓ}$ based on the identified charged leptons, and $ {A}_{\mathrm{C}}^{t\overline{t}} $ , based on the reconstructed tt final state. The asymmetries are measured to be $ {A}_{\mathrm{C}}^{\ell \ell }=0.024\pm 0.015\left(\mathrm{stat}.\right)\pm 0.009\left(\mathrm{syst}.\right), $ $ {A}_{\mathrm{C}}^{t\overline{t}}=0.021\pm 0.025\left(\mathrm{stat}.\right)\pm 0.017\left(\mathrm{syst}.\right). $",

author = "Clark, {Philip James} and Christos Leonidopoulos and Martin, {Victoria Jane} and Corrinne Mills and Atlas Collaboration",

year = "2015",

month = may,

day = "12",

doi = "10.1007/JHEP05(2015)061",

language = "English",

volume = "1505",

pages = "061",

journal = " Journal of High Energy Physics",

issn = "1029-8479",

publisher = "Springer",

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TY - JOUR

T1 - Measurement of the charge asymmetry in dileptonic decays of top quark pairs in $pp$ collisions at $\sqrt{s}=7$ TeV using the ATLAS detector

AU - Clark, Philip James

AU - Leonidopoulos, Christos

AU - Martin, Victoria Jane

AU - Mills, Corrinne

AU - Collaboration, Atlas

PY - 2015/5/12

Y1 - 2015/5/12

N2 - A measurement of the top-antitop $ \left(t\overline{t}\right) $ charge asymmetry is presented using data corresponding to an integrated luminosity of 4.6 fb$^{−1}$ of LHC pp collisions at a centreof-mass energy of 7 TeV collected by the ATLAS detector. Events with two charged leptons, at least two jets and large missing transverse momentum are selected. Two observables are studied: A$_{C}^{ℓℓ}$ based on the identified charged leptons, and $ {A}_{\mathrm{C}}^{t\overline{t}} $ , based on the reconstructed tt final state. The asymmetries are measured to be $ {A}_{\mathrm{C}}^{\ell \ell }=0.024\pm 0.015\left(\mathrm{stat}.\right)\pm 0.009\left(\mathrm{syst}.\right), $ $ {A}_{\mathrm{C}}^{t\overline{t}}=0.021\pm 0.025\left(\mathrm{stat}.\right)\pm 0.017\left(\mathrm{syst}.\right). $

AB - A measurement of the top-antitop $ \left(t\overline{t}\right) $ charge asymmetry is presented using data corresponding to an integrated luminosity of 4.6 fb$^{−1}$ of LHC pp collisions at a centreof-mass energy of 7 TeV collected by the ATLAS detector. Events with two charged leptons, at least two jets and large missing transverse momentum are selected. Two observables are studied: A$_{C}^{ℓℓ}$ based on the identified charged leptons, and $ {A}_{\mathrm{C}}^{t\overline{t}} $ , based on the reconstructed tt final state. The asymmetries are measured to be $ {A}_{\mathrm{C}}^{\ell \ell }=0.024\pm 0.015\left(\mathrm{stat}.\right)\pm 0.009\left(\mathrm{syst}.\right), $ $ {A}_{\mathrm{C}}^{t\overline{t}}=0.021\pm 0.025\left(\mathrm{stat}.\right)\pm 0.017\left(\mathrm{syst}.\right). $

U2 - 10.1007/JHEP05(2015)061

DO - 10.1007/JHEP05(2015)061

M3 - Article

SN - 1029-8479

VL - 1505

SP - 061

JO - Journal of High Energy Physics

JF - Journal of High Energy Physics

M1 - Aad:2015jfa

ER -

Measurement of the charge asymmetry in dileptonic decays of top quark pairs in $pp$ collisions at $\sqrt{s}=7$ TeV using the ATLAS detector

Abstract

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