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Measurement of the tt̅ production cross section in pp collisions at 7 TeV in lepton+jets events using b-quark jet identification

Author(s)
Alver, Burak Han; Bauer, Gerry P.; Bendavid, Joshua L.; Busza, Wit; Butz, Erik M.; Cali, Ivan Amos; Chan, M.; Dutta, Valentina; Everaerts, Pieter Bruno Bart; Ceballos, Guillelmo Gomez; Goncharov, Maxim; Hahn, Kristian Allan; Harris, Philip Coleman; Kim, Y.; Klute, Markus; Lee, Y. J.; Li, W.; Loizides, Constantin; Luckey, P. David, Jr.; Ma, Teng; Nahn, Steven; Paus, Christoph; Ralph, D.; Roland, Christof E.; Roland, Gunther M.; Rudolph, Matthew; Stephans, George S. F.; Stockli, Fabian; Sumorok, Konstanty C.; Sung, Kevin Kai Hong; Velicanu, Dragos Alexandru; Wenger, Edward Allen; Wolf, R.; Wyslouch, Boleslaw; Xie, S.; Yang, M.; Yilmaz, Yetkin; Yoon, A. S.; Zanetti, Marco; ... Show more Show less
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Abstract
A new measurement of the inclusive production cross section for pp→[¯ over tt] is performed at a center-of-mass energy of 7 TeV using data collected by the CMS experiment at the LHC. The analysis uses a data sample corresponding to an integrated luminosity of 36  pb[superscript -1], and is based on the final state with one isolated, high transverse momentum muon or electron, missing transverse energy, and hadronic jets. The tt[over ¯] content of the selected events is enhanced by requiring the presence of at least one jet consistent with b-quark hadronization. The measured cross section is 150±9(stat)±17(syst)±6(lumi)  pb and is in agreement with higher-order QCD calculations. The combination of this measurement with a previous CMS result based on dileptons gives 154±17(stat+syst)±6(lumi)  pb.
Date issued
2011-11
URI
http://hdl.handle.net/1721.1/75025
Department
Massachusetts Institute of Technology. Department of Physics; Massachusetts Institute of Technology. Laboratory for Nuclear Science
Journal
Physical Review D
Publisher
American Physical Society
Citation
Chatrchyan, S. et al. “Measurement of the [¯ over tt] production cross section in pp collisions at 7 TeV in lepton+jets events using b-quark jet identification.” Physical Review D 84.9 (2011). © 2011 CERN
Version: Final published version
ISSN
1550-7998
1089-4918

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