Record link: 
http://hdl.handle.net/20.500.12708/164484
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Title: 
Measurement of the top-quark mass in tt̄ events with dilepton final states in pp collisions at √s = 7 TeV
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Citation: 
Bergauer, T., Fabjan, C., Friedl, M., Frühwirth, R., Jeitler, M., Krammer, M., Wulz, C.-E., & CMS Collaboration. (2012). Measurement of the top-quark mass in tt̄ events with dilepton final states in pp collisions at √s = 7 TeV. The European Physical Journal C, 72(10), Article 2202. https://doi.org/10.1140/epjc/s10052-012-2202-z
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Publisher DOI: 
10.1140/epjc/s10052-012-2202-z
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Publication Type: 
Article - Original Research Article
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Language: 
English
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Authors: 
Bergauer, Thomas 
Fabjan, Christian 
Friedl, Markus 
Frühwirth, Rudolf 
Jeitler, Manfred 
Krammer, Manfred 
Wulz, Claudia-Elisabeth 
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Author Collaboration: 
CMS Collaboration
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Organisational Unit: 
E141-03 - Forschungsbereich Nuclear and Particle Physics 
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Journal: 
The European Physical Journal C 
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ISSN: 
1434-6044
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Date (published): 
Oct-2012
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Number of Pages: 
21
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Publisher: 
SPRINGER
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Peer reviewed: 
Yes
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Keywords: 
Physics and Astronomy (miscellaneous); Engineering (miscellaneous); top-quark
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Abstract: 
The top-quark mass is measured in proton-proton collisions at √s = 7 TeV using a data sample corresponding to an integrated luminosity of 5.0 fb⁻¹ collected by the CMS experiment at the LHC. The measurement is performed in the dilepton decay channel tt̄ → (ℓ+νℓb)(ℓ−ν̅ ℓb̄), where ℓ = e,μ. Candidate top-quark decays are selected by requiring two leptons, at least two jets, and imbalance in trans verse momentum. The mass is reconstructed with an analytical matrix weighting technique using distributions derived from simulated samples. Using a maximum-likelihood fit, the top-quark mass is determined to be 172.5 ± 0.4 (stat.) ± 1.5 (syst.) GeV.
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Research Areas: 
Quantum Modelling and Simulation: 30%
außerhalb der gesamtuniversitären Forschungsschwerpunkte: 70%
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Science Branch: 
Physik, Mechanik, Astronomie
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