ATLAS, Collaboration; Agustoni, Marco; Ancu, Lucian; Beck, Hans Peter; Borer, Claudia; Cervelli, Alberto; Ereditato, Antonio; Gallo, Valentina; Haug, Sigve; Kruker, Tobias; Schneider, Basil; Sciacca, Gianfranco; Weber, Michael (2014). Measurement of the top quark pair production charge asymmetry in proton-proton collisions at s√ = 7 TeV using the ATLAS detector. Journal of High Energy Physics, 2014(2) Springer 10.1007/JHEP02(2014)107
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This paper presents a measurement of the top quark pair () production charge asymmetry A (C) using 4.7 fb(-1) of proton-proton collisions at a centre-of-mass energy root s = 7 TeV collected by the ATLAS detector at the LHC. A -enriched sample of events with a single lepton (electron or muon), missing transverse momentum and at least four high transverse momentum jets, of which at least one is tagged as coming from a b-quark, is selected. A likelihood fit is used to reconstruct the event kinematics. A Bayesian unfolding procedure is employed to estimate A (C) at the parton-level. The measured value of the production charge asymmetry is A (C) = 0.006 +/- 0.010, where the uncertainty includes both the statistical and the systematic components. Differential A (C) measurements as a function of the invariant mass, the rapidity and the transverse momentum of the system are also presented. In addition, A (C) is measured for a subset of events with large velocity, where physics beyond the Standard Model could contribute. All measurements are consistent with the Standard Model predictions.
Item Type: |
Journal Article (Original Article) |
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Division/Institute: |
08 Faculty of Science > Physics Institute > Laboratory for High Energy Physics (LHEP) 10 Strategic Research Centers > Albert Einstein Center for Fundamental Physics (AEC) |
UniBE Contributor: |
Agustoni, Marco, Ancu, Lucian, Beck, Hans Peter, Borer, Claudia, Cervelli, Alberto, Ereditato, Antonio, Gallo, Valentina, Haug, Sigve, Kruker, Tobias, Schneider, Basil, Sciacca, Gianfranco, Weber, Michele |
Subjects: |
500 Science > 530 Physics |
ISSN: |
1029-8479 |
Publisher: |
Springer |
Language: |
English |
Submitter: |
Andrea Stettler |
Date Deposited: |
01 Oct 2014 08:14 |
Last Modified: |
05 Dec 2022 14:37 |
Publisher DOI: |
10.1007/JHEP02(2014)107 |
Web of Science ID: |
000332491600001 |
ArXiv ID: |
1311.6724v2 |
Additional Information: |
Kollaboration - Es sind nur die Berner Autoren namentlich erwähnt. |
BORIS DOI: |
10.7892/boris.58965 |
URI: |
https://boris.unibe.ch/id/eprint/58965 |
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