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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
KTH, School of Engineering Sciences (SCI), Physics, Particle and Astroparticle Physics.
KTH, School of Engineering Sciences (SCI), Physics, Particle and Astroparticle Physics.
KTH, School of Engineering Sciences (SCI), Physics, Particle and Astroparticle Physics.
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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 (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 beA 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.

Place, publisher, year, edition, pages
Springer-Verlag New York, 2015. no 5, 061
Keyword [en]
Hadron-Hadron Scattering, Top physics
National Category
Physical Sciences
Identifiers
URN: urn:nbn:se:kth:diva-171205DOI: 10.1007/JHEP05(2015)061ISI: 000356951100004Scopus ID: 2-s2.0-84929461885OAI: oai:DiVA.org:kth-171205DiVA: diva2:842557
Note

Qc 20150721

Available from: 2015-07-21 Created: 2015-07-21 Last updated: 2017-12-04Bibliographically approved

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Strandberg, Jonas

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