Measurement of the top quark mass in the tt¯→ lepton+jets and tt¯→ dilepton channels using s√=7 TeV ATLAS data
2015 | journal article. A publication with affiliation to the University of Göttingen.
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Measurement of the top quark mass in the tt¯→ lepton+jets and tt¯→ dilepton channels using s√=7 TeV ATLAS data
Aad, G.; Abbott, B.; Abdallah, J.; Abdinov, O.; Aben, R.; Abolins, M. & AbouZeid, O. S. et al. (2015)
The European Physical Journal C, 75 art. 330. DOI: https://doi.org/10.1140/epjc/s10052-015-3544-0
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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 top quark mass was measured in the channels t ¯t → lepton+jets and t ¯t → dilepton (lepton = e,μ) based on ATLAS data recorded in 2011. The data were taken at theLHCwith a proton–proton centre-of-mass energy of √ s = 7 TeV and correspond to an integrated luminosity of 4.6 fb−1. The t ¯t → lepton+jets analysis uses a three-dimensional template technique which determines the top quark mass together with a global jet energy scale factor (JSF), and a relative b-to-light-jet energy scale factor (bJSF), where the terms b-jets and light-jets refer to jets originating from b-quarks and u, d, c, s-quarks or gluons, respectively. The analysis of the t ¯t → dilepton channel exploits a one-dimensional template method using the m b observable, defined as the average invariant mass of the two lepton+b-jet pairs in each event. The top quark mass is measured to be 172.33±0.75(stat + JSF + bJSF)± 1.02(syst) GeV, and 173.79 ± 0.54(stat) ± 1.30(syst) GeV in the t ¯t → lepton+jets and t ¯t → dilepton channels, respectively. The combination of the two results yields mtop = 172.99 ± 0.48(stat) ± 0.78(syst) GeV, with a total uncertainty of 0.91 GeV.
- Issue Date
- 2015
- Journal
- The European Physical Journal C
- Project
- info:eu-repo/grantAgreement/EC/FP7/246806/EU/European Particle physics Latin American NETwork/EPLANET
- Organization
- Fakultät für Physik
- ISSN
- 1434-6052
- Language
- English