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Measurement of the charge asymmetry in dileptonic decays of top quark pairs in pp collisions at root s=7 TeV using the ATLAS detector
Stockholm University, Faculty of Science, Department of Physics. Stockholm University, Faculty of Science, The Oskar Klein Centre for Cosmo Particle Physics (OKC).
Stockholm University, Faculty of Science, Department of Physics. Stockholm University, Faculty of Science, The Oskar Klein Centre for Cosmo Particle Physics (OKC).
Stockholm University, Faculty of Science, Department of Physics. Stockholm University, Faculty of Science, The Oskar Klein Centre for Cosmo Particle Physics (OKC).
Stockholm University, Faculty of Science, Department of Physics. Stockholm University, Faculty of Science, The Oskar Klein Centre for Cosmo Particle Physics (OKC).
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Number of Authors: 2884
2015 (English)In: Journal of High Energy Physics (JHEP), ISSN 1126-6708, E-ISSN 1029-8479, no 5, 061Article in journal (Refereed) Published
Abstract [en]

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
Keyword [en]
Hadron-Hadron Scattering, Top physics
National Category
Physical Sciences
Identifiers
URN: urn:nbn:se:su:diva-119073DOI: 10.1007/JHEP05(2015)061ISI: 000356951100004OAI: oai:DiVA.org:su-119073DiVA: diva2:845756
Available from: 2015-08-13 Created: 2015-07-27 Last updated: 2017-12-04Bibliographically approved

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Abulaiti, YimingÅkerstedt, HenrikÅsman, BarbroBendtz, KatarinaBertoli, GabrieleBessidskaia Bylund, OlgaBohm, ChristianClement, ChristopheCribbs, Wayne A.Eriksson, DanielGellerstedt, KarlHellman, StenJohansson, K. ErikJon-And, KerstinKhandanyan, HovhannesKim, HeyonKlimek, PawelLundberg, OlofMilstead, David A.Moa, TorbjörnMolander, SimonPetridis, AndreasPlucinski, PawelRossetti, ValerioSilverstein, Samuel B.Sjölin, JörgenStrandberg, SaraTylmad, Maja
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Department of PhysicsThe Oskar Klein Centre for Cosmo Particle Physics (OKC)
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