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

, The ATLAS collaboration (2015) Measurement of the charge asymmetry in dileptonic decays of top quark pairs in pp collisions at s √ =7 TeV using the ATLAS detector. Journal of High Energy Physics, 2015 (5). ISSN 1029-8479

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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.

Item Type:
Journal Article
Journal or Publication Title:
Journal of High Energy Physics
Additional Information:
Open Access, Copyright CERN, for the benefit of the ATLAS Collaboration. Article funded by SCOAP3.
Uncontrolled Keywords:
/dk/atira/pure/subjectarea/asjc/3100/3106
Subjects:
ID Code:
75468
Deposited By:
Deposited On:
09 Sep 2015 06:34
Refereed?:
Yes
Published?:
Published
Last Modified:
04 Dec 2020 02:13