ATLAS, Collaboration; Beck, Hans Peter; Cervelli, Alberto; Ereditato, Antonio; Haug, Sigve; Kabana, Sonja; Meloni, Federico; Mullier, Geoffrey André Adrien; Pretzl, Klaus-Peter; Stramaglia, Maria Elena; Stucci, Stefania; Weber, Michael (2015). Measurement of the top quark mass in the t ¯t → lepton+jets and t ¯t → dilepton channels using √s = 7 TeV ATLAS data. European physical journal. C - particles and fields, C75(7), p. 330. EDP Sciences 10.1140/epjc/s10052-015-3544-0
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The top quark mass was measured in the channels tt ¯ →lepton+jets and tt ¯ →dilepton (lepton=e,μ ) based on ATLAS data recorded in 2011. The data were taken at the LHC with a proton--proton centre-of-mass energy of √s=7 TeV and correspond to an integrated luminosity of 4.6fb −1 . The tt ¯ →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 tt ¯ →dilepton channel exploits a one-dimensional template method using the m ℓb 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)±1.02(syst) GeV, and 173.79±0.54(stat)±1.30(syst) GeV in the tt ¯ →lepton+jets and tt ¯ →dilepton channels, respectively. The combination of the two results yields m top =172.99±0.48(stat)±0.78(syst) GeV, with a total uncertainty of 0.91 GeV.
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.
Item Type: |
Journal Article (Original Article) |
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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) 08 Faculty of Science > Other Institutions > Emeriti, Faculty of Science |
UniBE Contributor: |
Beck, Hans Peter, Cervelli, Alberto, Ereditato, Antonio, Haug, Sigve, Meloni, Federico, Mullier, Geoffrey André Adrien, Pretzl, Klaus-Peter, Stramaglia, Maria Elena, Stucci, Stefania, Weber, Michele |
Subjects: |
500 Science > 530 Physics |
ISSN: |
1434-6044 |
Publisher: |
EDP Sciences |
Language: |
English |
Submitter: |
Annette Krebs-Wegenast |
Date Deposited: |
07 Sep 2016 15:22 |
Last Modified: |
05 Dec 2022 14:58 |
Publisher DOI: |
10.1140/epjc/s10052-015-3544-0 |
ArXiv ID: |
1503.05427v2 |
Additional Information: |
Kollaboration - Es sind nur die Berner Autoren namentlich erwähnt |
BORIS DOI: |
10.7892/boris.87642 |
URI: |
https://boris.unibe.ch/id/eprint/87642 |
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