Record link: 
http://hdl.handle.net/20.500.12708/164529
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Title: 
Measurement of the tt̄ production cross section in pp collisions at √s = 7 TeV in dilepton final states containing a 𝜏
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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 tt̄ production cross section in pp collisions at √s = 7 TeV in dilepton final states containing a 𝜏. Physical Review D, 85(11), Article 112007. https://doi.org/10.1103/physrevd.85.112007
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Publisher DOI: 
10.1103/physrevd.85.112007
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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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Journal: 
Physical Review D 
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ISSN: 
2470-0010
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Date (published): 
1-Jun-2012
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Number of Pages: 
18
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Publisher: 
AMER PHYSICAL SOC
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Peer reviewed: 
Yes
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Keywords: 
Nuclear and High Energy Physics; pp collisions; cross section
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Abstract: 
The top quark pair production cross section is measured in dilepton events with one electron or muon, and one hadronically decaying τ lepton from the decay tt̄ → (ℓν_ℓ), (τ_h ν_τ)bb̄, (ℓ = e, μ). The data sample corresponds to an integrated luminosity of 2.0 fb⁻¹ for the electron channel and 2.2 fb⁻¹ for the muon channel, collected by the CMS detector at the LHC. This is the first measurement of the tt̄ cross section explicitly including τ leptons in proton-proton collisions at √s = 7 TeV. The measured value σ_tt̄ = 143 ± 14(stat) ± 22(syst) ± 3(lumi) pb is consistent with the standard model predictions.
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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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