Measurement of the tt̅ production cross section in pp collisions at √s=7 TeV in dilepton final states containing a τ
Author(s)
Bendavid, Joshua L.; Busza, Wit; Butz, Erik M.; Cali, Ivan Amos; Chan, M.; Dutta, Valentina; Gomez-Ceballos, Guillelmo; Goncharov, Maxim; Hahn, Kristian Allan; Kim, Y.; Klute, Markus; Li, W.; Ma, Teng; Nahn, Steven; Paus, Christoph M. E.; Ralph, Duncan Kelley; Stephans, George S. F.; Sung, Kevin Kai Hong; Velicanu, Dragos Alexandru; Wenger, Edward Allen; Wyslouch, Boleslaw; Yilmaz, Yetkin; Yoon, A. S.; Zanetti, Marco; Bauer, Gerry P; Lee, Yen-Jie; Luckey Jr, P David; Roland, Christof E; Roland, Gunther M; Rudolph, Matthew Scott; Stoeckli, Fabian; Sumorok, Konstanty C; Wolf, Roger; Xie, Si; Yang, Mingming; ... Show more Show less
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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 tt̅ →(ℓν[subscript ℓ])(τ[subscript h]ν[subscript τ])bb̅ , (ℓ=e,μ). The data sample corresponds to an integrated luminosity of 2.0 fb[superscript -1] for the electron channel and 2.2 fb[superscript -1] for the muon channel, collected by the CMS detector at the LHC. This is the first measurement of the tt̅ cross section explicitly including τ leptons in proton-proton collisions at √s=7 TeV. The measured value σ[subscript tt̅] =143±14(stat)±22(syst)±3(lumi) pb is consistent with the standard model predictions.
Date issued
2012-06Department
Massachusetts Institute of Technology. Department of Physics; Massachusetts Institute of Technology. Laboratory for Nuclear ScienceJournal
Physical Review D
Publisher
American Physical Society
Citation
Chatrchyan, S. et al. “Measurement of the Tt[over ¯] Production Cross Section in Pp Collisions at Sqrt[s]=7 TeV in Dilepton Final States Containing a τ.” Physical Review D 85.11 (2012). © 2012 CERN, for the CMS Collaboration
Version: Final published version
ISSN
1550-7998
1089-4918