ATLAS, Collaboration; Beck, Hans Peter; Cervelli, Alberto; Ereditato, Antonio; Haug, Sigve; Kabana, Sonja; Meloni, Federico; Pretzl, Klaus-Peter; Stramaglia, Maria Elena; Stucci, Stefania; Weber, Michael (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), p. 61. Springer 10.1007/JHEP05(2015)061
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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 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 ℓℓ C 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 (Original Article) |
|---|---|
Division/Institute: |
10 Strategic Research Centers > Albert Einstein Center for Fundamental Physics (AEC) 08 Faculty of Science > Physics Institute > Laboratory for High Energy Physics (LHEP) |
UniBE Contributor: |
Beck, Hans Peter, Cervelli, Alberto, Ereditato, Antonio, Haug, Sigve, Meloni, Federico, Pretzl, Klaus-Peter, Stramaglia, Maria Elena, Stucci, Stefania, Weber, Michele |
Subjects: |
500 Science > 530 Physics |
ISSN: |
1029-8479 |
Publisher: |
Springer |
Language: |
English |
Submitter: |
Annette Krebs-Wegenast |
Date Deposited: |
06 Sep 2016 15:25 |
Last Modified: |
05 Dec 2022 14:58 |
Publisher DOI: |
10.1007/JHEP05(2015)061 |
ArXiv ID: |
1501.07383 |
Additional Information: |
Kollaboration - Es sind nur die Berner Autoren namentlich erwähnt |
BORIS DOI: |
10.7892/boris.87660 |
URI: |
https://boris.unibe.ch/id/eprint/87660 |
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