Measurement of the tt¯W and tt¯Z production cross sections in pp collisions at s√=8 TeV with the ATLAS detector
2015 | journal article. A publication with affiliation to the University of Göttingen.
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Measurement of the tt¯W and tt¯Z production cross sections in pp collisions at s√=8 TeV with the ATLAS detector
Aad, G.; Abbott, B.; Abdallah, J.; Abdinov, O.; Aben, R.; Abolins, M. & AbouZeid, O. S. et al. (2015)
Journal of High Energy Physics, 172. DOI: https://doi.org/10.1007/JHEP11(2015)172
Documents & Media
Details
- Authors Group
- ATLAS Collaboration
The authors list is uncomplete: - Authors
- Aad, G.; Abbott, B.; Abdallah, J.; Abdinov, O.; Aben, R.; Abolins, M.; AbouZeid, O. S.; Abramowicz, H.; Abreu, H.; Abreu, R.; Zwalinski, L.
- Abstract
- The production cross sections of top-quark pairs in association with massive vector bosons have been measured using data from pp collisions at s√=8 TeV. The dataset corresponds to an integrated luminosity of 20.3 fb−1 collected by the ATLAS detector in 2012 at the LHC. Final states with two, three or four leptons are considered. A fit to the data considering the tt¯W and tt¯Z processes simultaneously yields a significance of 5.0σ (4.2σ) over the background-only hypothesis for tt¯W (tt¯Z) production. The measured cross sections are σtt¯W=369+100−91 fb and σtt¯Z=176+58−52 fb. The background-only hypothesis with neither tt¯W nor tt¯Z production is excluded at 7.1σ. All measurements are consistent with next-to-leading-order calculations for the tt¯W and tt¯Z processes.
- Issue Date
- 2015
- Journal
- Journal of High Energy Physics
- Project
- info:eu-repo/grantAgreement/EC/FP7/246806/EU/European Particle physics Latin American NETwork/EPLANET
info:eu-repo/grantAgreement/EC/H2020//EU// - Organization
- Fakultät für Physik
- ISSN
- 1029-8479
- Language
- English
