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  • art%3A10.1007%2FJHEP05%282015%29061

    Rights statement: Open Access, Copyright CERN, for the benefit of the ATLAS Collaboration. Article funded by SCOAP3.

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Measurement of the charge asymmetry in dileptonic decays of top quark pairs in pp collisions at s √ =7 TeV using the ATLAS detector

Research output: Contribution to Journal/Magazine › Journal article › peer-review

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Article number61
<mark>Journal publication date</mark>12/05/2015
<mark>Journal</mark>Journal of High Energy Physics
Issue number5
Volume2015
Number of pages50
Publication StatusPublished
<mark>Original language</mark>English

Abstract

A measurement of the top-antitop (tt ¯ ) 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 tt ¯ C , based on the reconstructed tt final state. The asymmetries are measured to be


A ℓℓ C =0.024±0.015(stat.)±0.009(syst.),



A tt ¯ C =0.021±0.025(stat.)±0.017(syst.).

The measured values are in agreement with the Standard Model predictions.

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Open Access, Copyright CERN, for the benefit of the ATLAS Collaboration. Article funded by SCOAP3.