Measurement of the charge asymmetry in dileptonic decays of top quark pairs in pp collisions at root s=7 TeV using the ATLAS detector
Number of Authors: 2885
2015 (English)In: Journal of High Energy Physics (JHEP), ISSN 1029-8479, E-ISSN 1126-6708, no 5, 061Article in journal (Refereed) Published
A measurement of the top-antitop (t (t) over bar) charge asymmetry is presented using data corresponding to an integrated luminosity of 4.6 fb(-1) of LHC pp collisions at a centre-of-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(C)(t (t) over bar), based on the reconstructed t (t) over bar final state. The asymmetries are measured to be A(C)(ll) =0.024 +/- 0.015 (stat.) +/- 0.009 (syst.), A(C)(t (t) over bar) = 0.021 +/- 0.025 (stat.) +/- 0.017 (syst.). The measured values are in agreement with the Standard Model predictions.
Place, publisher, year, edition, pages
2015. no 5, 061
IdentifiersURN: urn:nbn:se:uu:diva-258907DOI: 10.1007/JHEP05(2015)061ISI: 000356951100004OAI: oai:DiVA.org:uu-258907DiVA: diva2:842644
ATLAS Collaboration, for complete list of authors see http://dx.doi.org/10.1007/JHEP05(2015)0612015-07-212015-07-212015-07-21Bibliographically approved